阅读说明：本技术 一种内窥镜光源和内窥镜系统 (Endoscope light source and endoscope system ) 是由 邱建军 王森豪 陈云亮 于 2020-06-12 设计创作，主要内容包括：本申请提供一种内窥镜光源,包括：至少两个发光部件,用于发射不同颜色的照明光；二向色滤光片组件,用于将所述至少两个发光部件发射的照明光集成为合束光；其中,当所述至少两个发光部件按照第一预设发光比例发射照明光时,经所述二向色滤光片组件集成的合束光具有大于或等于70的平均显色指数和大于或等于80的饱和红色显色指数。由此,本申请提供的内窥镜光源可提供具有较佳色彩再现性,尤其是对饱和红色具有高色彩还原能力的照明光,有利于临床诊断和治疗。本申请同时还提供了内窥镜系统,具有上述有益效果。(The present application provides an endoscope light source comprising: at least two light emitting parts for emitting illumination lights of different colors; a dichroic filter assembly for integrating illumination light emitted by the at least two light emitting components into a combined beam of light; wherein the combined light integrated by the dichroic filter assembly has an average color rendering index of greater than or equal to 70 and a saturated red color rendering index of greater than or equal to 80 when the at least two light emitting components emit illumination light at a first preset light emission ratio. Therefore, the endoscope light source provided by the application can provide illuminating light with better color reproducibility, particularly high color reduction capability on saturated red, and is favorable for clinical diagnosis and treatment. The application also provides an endoscope system, which has the beneficial effects.)

1. An endoscopic light source, comprising:

at least two light emitting parts for emitting illumination lights of different colors;

a dichroic filter assembly for integrating illumination light emitted by the at least two light emitting components into a combined beam of light;

wherein the combined light integrated by the dichroic filter assembly has an average color rendering index of greater than or equal to 70 and a saturated red color rendering index of greater than or equal to 80 when the at least two light emitting components emit illumination light at a first preset light emission ratio.

2. The endoscopic light source of claim 1 wherein the combined beam light integrated via the dichroic filter assembly has an average color rendering index greater than or equal to 90 and a saturated red color rendering index greater than or equal to 80 when the at least two light emitting components emit illumination light at the first preset light emission ratio.

3. An endoscope light source according to claim 1 or 2 and wherein when said at least two light emitting members emit illumination light in accordance with said first preset light emission ratio, the combined light integrated via said dichroic filter assembly is composed of white light having an average color rendering index of 90 or more and narrow-band red light having a peak wavelength of 640nm to 660 nm.

4. An endoscope light source according to claim 3 and wherein said at least two light members comprise a first white light member and a first red light member;

the first white light emitting component is for emitting white light having an average color rendering index greater than or equal to 90;

the first red light-emitting component is used for emitting narrow-band red light with the peak wavelength of 640 nm-660 nm;

the dichroic filter assembly comprises a first dichroic filter, wherein the first dichroic filter has a transmission characteristic of reflecting a waveband where the narrow-band red light is located and transmitting other wavebands, or the first dichroic filter has a transmission characteristic of transmitting the waveband where the narrow-band red light is located and reflecting other wavebands.

5. An endoscope light source according to claim 1 or 2 and wherein when said at least two light emitting members emit light at said first predetermined ratio, the combined beam light integrated via said dichroic filter assembly is comprised of blue light, green light and broadband red light including at least a wavelength range of 600nm to 680 nm.

6. An endoscope light source according to claim 5 and wherein said at least two light emitting members comprise a blue light emitting member, a green light emitting member and a second red light emitting member;

the blue light emitting component is used for emitting the blue light; the green light emitting component is used for emitting the green light; the second red light emitting component is used for emitting the broadband red light at least comprising the wavelength range of 600 nm-680 nm;

the dichroic filter assembly includes a second dichroic filter and a third dichroic filter;

and the blue light, the green light and the broadband red light at least comprising a 600 nm-680 nm waveband range are integrated by the second dichroic filter and the third dichroic filter to form the beam combining light.

7. The endoscope light source of claim 6, wherein the light emitting surface of the second red light emitting member includes a plurality of light emitting elements for emitting a plurality of red narrow-band lights which are distributed continuously but have different peak wavelengths from each other to form the broad-band red light including at least a wavelength range of 600nm to 680 nm.

8. An endoscope light source according to claim 5 and wherein said at least two light emitting members comprise a blue light emitting member, a green light emitting member and a second white light emitting member;

the blue light emitting component is used for emitting the blue light; the green light emitting component is used for emitting the green light; the second white light emitting component is used for emitting white light;

the dichroic filter assembly comprises a fourth dichroic filter positioned on an emergent light path of the second white light emitting component, and the white light emitted by the second white light emitting component forms broadband red light at least comprising a wavelength range of 600 nm-680 nm after passing through the fourth dichroic filter.

9. An endoscope light source according to any of claims 6-8 and wherein said green light emitting member is located adjacent to a light exit location of said combined beam of light.

10. An endoscopic system, comprising: an endoscope, an image processing apparatus, a monitor, and the endoscope light source according to any one of claims 1 to 9.

Technical Field

The present application relates to the field of endoscope technologies, and in particular, to an endoscope light source and an endoscope system.

Background

The endoscope can be extended into a body cavity to carry out high-resolution observation and implement minimally invasive treatment, and is widely applied to clinic. The endoscope system is composed of an endoscope light source, an endoscope, an image processing device, a monitor, and the like. The endoscope light source generates illumination light, and the illumination light is coupled into a light guide optical fiber of the endoscope through the optical path coupling structure, so that the detected object in the body cavity is illuminated. The illumination light reflected by the object to be detected is imaged onto the imaging element through the optical system of the endoscope, and an image processing signal is generated and processed by the image processing apparatus. The display device displays the processed image for observation. Currently, the imaging modes of an endoscope system generally include a white light imaging mode and a special light imaging mode. The white light imaging mode can display the real color of the detected object for conventional observation; the special light imaging mode adopts the illuminating light with a specific spectral band to irradiate the detected object for highlighting the mucous membrane vascular structure in the focus area.

However, in practical applications it is found that: when the existing endoscope system is used for clinical diagnosis and treatment, the problems that the boundary between a lesion area and normal tissues is difficult to distinguish accurately, the nature of the lesion is difficult to judge intuitively (for example, whether the lesion is caused by helicobacter pylori infection or not is judged during gastroscope observation; for example, a new bleeding point and an old bleeding point are distinguished quickly), and the operation is influenced due to the displayed dark color of the liver and the bleeding area still exist.

Therefore, how to provide a solution to the above technical problems is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

An object of the present application is to provide an endoscope light source capable of providing a combined beam illumination light having a superior color reproducibility, particularly, a high color reproducibility to a saturated red color, so that, when clinical diagnosis and treatment are performed using the endoscope system including the endoscope light source, it is possible to facilitate a doctor to accurately distinguish a boundary between a diseased region and a normal tissue based on an observed image, judge a nature of a diseased tissue, and perform other relevant clinical operations by emitting the combined beam illumination light. The specific scheme is as follows:

the application discloses endoscope light source includes:

at least two light emitting parts for emitting illumination lights of different colors;

a dichroic filter assembly for integrating illumination light emitted by the at least two light emitting components into a combined beam of light;

wherein the combined light integrated by the dichroic filter assembly has an average color rendering index of greater than or equal to 70 and a saturated red color rendering index of greater than or equal to 80 when the at least two light emitting components emit illumination light at a first preset light emission ratio.

Optionally, when the at least two light emitting components emit illumination light according to the first preset light emission ratio, the combined light integrated by the dichroic filter assembly has an average color rendering index greater than or equal to 90 and a saturated red color rendering index greater than or equal to 80.

Optionally, when the at least two light emitting components emit illumination light according to the first preset light emitting ratio, the combined light integrated by the dichroic filter component is composed of white light having an average color rendering index greater than or equal to 90 and narrow-band red light having a peak wavelength between 640nm and 660 nm.

Optionally, the at least two light emitting components comprise a first white light emitting component and a first red light emitting component;

the first white light emitting component is for emitting white light having an average color rendering index greater than or equal to 90;

the first red light-emitting component is used for emitting narrow-band red light with the peak wavelength of 640 nm-660 nm;

the dichroic filter assembly comprises a first dichroic filter, wherein the first dichroic filter has a transmission characteristic of reflecting a waveband where the narrow-band red light is located and transmitting other wavebands, or the first dichroic filter has a transmission characteristic of transmitting the waveband where the narrow-band red light is located and reflecting other wavebands.

Optionally, when the at least two light emitting components emit light according to the first preset light emitting ratio, the combined light integrated by the dichroic filter component is composed of blue light, green light, and broadband red light at least including a wavelength range of 600nm to 680 nm.

Optionally, the at least two light emitting components comprise a blue light emitting component, a green light emitting component and a second red light emitting component;

the blue light emitting component is used for emitting the blue light; the green light emitting component is used for emitting the green light; the second red light emitting component is used for emitting the broadband red light at least comprising the wavelength range of 600 nm-680 nm;

the dichroic filter assembly includes a second dichroic filter and a third dichroic filter;

and the blue light, the green light and the broadband red light at least comprising a 600 nm-680 nm waveband range are integrated by the second dichroic filter and the third dichroic filter to form the beam combining light.

Optionally, the light emitting surface of the second red light emitting component includes a plurality of light emitting elements, and the plurality of light emitting elements are configured to emit a plurality of red narrow-band lights which are distributed continuously and have different peak wavelengths from each other, so as to form the broadband red light at least including a wavelength range of 600nm to 680 nm.

Optionally, the at least two light emitting components comprise a blue light emitting component, a green light emitting component and a second white light emitting component;

the blue light emitting component is used for emitting the blue light; the green light emitting component is used for emitting the green light; the second white light emitting component is used for emitting white light;

the dichroic filter assembly comprises a fourth dichroic filter positioned on an emergent light path of the second white light emitting component, and the white light emitted by the second white light emitting component forms broadband red light at least comprising a wavelength range of 600 nm-680 nm after passing through the fourth dichroic filter.

Optionally, the green light emitting component is located near a light exit position of the combined beam of light.

The application discloses an endoscope system, includes: an endoscope, an image processing apparatus, a monitor, and the endoscope light source described above.

The present application provides an endoscope light source comprising: at least two light emitting parts for emitting illumination lights of different colors; a dichroic filter assembly for integrating illumination light emitted by the at least two light emitting components into a combined beam of light; wherein the combined light integrated by the dichroic filter assembly has an average color rendering index of greater than or equal to 70 and a saturated red color rendering index of greater than or equal to 80 when the at least two light emitting components emit illumination light at a first preset light emission ratio.

Therefore, the endoscope light source provided by the application can provide combined illumination light with better color reproducibility, particularly high color reduction capability on saturated red, so that when an endoscope system comprising the endoscope light source is used for clinical diagnosis and treatment, by emitting the combined illumination light, doctors can conveniently and accurately distinguish the boundary between a diseased region and normal tissues based on an observed image, judge the nature of the diseased region and perform other related clinical operations.

The application also provides an endoscope system, which has the beneficial effects, and the details are not repeated herein.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an endoscope light source according to an embodiment of the present disclosure;

FIG. 2 is a graph of a spectrum of a first combined beam of light provided by an embodiment of the present application;

FIG. 3 is a graph of a spectrum of a second combined beam of light provided by an embodiment of the present application;

FIG. 4 is a block diagram of another endoscope light source provided in accordance with an embodiment of the present application;

fig. 5 is a schematic structural diagram of an endoscope system according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Currently, when the existing endoscope system is used for clinical diagnosis and treatment, the problems that the boundary between a lesion area and normal tissues is difficult to distinguish accurately, the nature of the lesion is difficult to judge intuitively (for example, whether the lesion is caused by helicobacter pylori infection or not is judged during gastroscopic observation; for example, a new bleeding point and an old bleeding point are distinguished rapidly), and the operation is influenced due to the displayed dark color of the liver and the bleeding area generally exist.

For this reason, the inventors of the present application found that: this is mainly because, in the existing illumination mode (white light mode or special light mode), the reduction capability of the illumination light on the saturated red is poor, so that the endoscope image has a deviation on the color development of the red, and it is difficult to accurately reflect the detail information of the red in the cavity.

The reason why the reduction capability of the saturated red color is poor in the existing illumination mode is that: in the existing white light mode, white illumination light is mainly provided by a white light LED or a multispectral combination mode; however, due to the limitation of the LED process conditions, both the white LED method and the multispectral combination method can only meet the national standard requirement of the average color rendering index (i.e., Ra is greater than or equal to 90), but the reduction capability of saturated red is poor. The combined light in the existing special light mode is usually composed of blue light (or blue-violet light) + green light, and does not relate to red light.

In view of this, the present application provides an endoscope light source and an endoscope system including the endoscope light source.

Wherein the endoscope light source includes at least two light emitting parts for emitting illumination lights of different colors and a dichroic filter assembly for integrating the illumination lights emitted from the light emitting parts into a combined light, and the combined light integrated via the dichroic filter assembly has an average color rendering index of 70 or more and a saturated red color rendering index of 80 or more when the light emitting parts emit the illumination light at a first preset light emission ratio. Therefore, the endoscope light source provided by the embodiment of the application can provide combined illumination light with better color reproducibility, particularly high color reduction capability on saturated red, so that when an endoscope system comprising the endoscope light source is used for clinical diagnosis and treatment, by emitting the combined illumination light, doctors can conveniently and accurately distinguish the boundary between a lesion area and normal tissues based on an observed image, judge the nature of a lesion and perform other related clinical operations.

The endoscope light source and the endoscope system provided by the embodiments of the present application will be described in detail below with reference to the drawings of the specification.

Fig. 1 is a partial structural schematic diagram of an endoscope light source according to an embodiment of the present disclosure. Referring to fig. 1, the endoscope light source includes:

at least two light emitting parts 11(11-1 and 11-2) for emitting illumination lights of different colors;

a dichroic filter assembly 12 for integrating illumination light emitted by the at least two light emitting components into a combined beam of light;

wherein the combined light integrated by the dichroic filter assembly 12 has an average color rendering index (Ra) of 70 or more and a saturated red color rendering index (R9) of 80 or more when the at least two light emitting parts 11 emit the illumination light at the first preset light emitting ratio.

One or more dichroic filters having specific transmission characteristics may be included in the dichroic filter assembly 12, and the number and transmission characteristics of the dichroic filters may be determined according to the number, emission spectrum, and relative position of the light emitting parts.

The "combined beam light" refers to illumination light coupled to the light outlet of the endoscope light source, and specifically may be illumination light emitted from the dichroic filter closest to the light outlet of the endoscope light source.

The "first preset light emission ratio" refers to a light emission ratio between the light-emitting components set to form combined light having an average color rendering index (Ra) of 70 or more and a saturated red color rendering index (R9) of 80 or more, and may specifically refer to: a light intensity ratio, a luminance ratio, a power ratio, a driving amount ratio, or the like between the light emitting parts.

The average color rendering index (Ra) is the average value of special color rendering indexes (R1-R8) of 8 color samples specified by the International Commission on illumination, and is used for measuring the overall color reproducibility of the light source, when Ra is larger than or equal to 70, the reproducibility of the overall color can be basically ensured, and when Ra is larger than or equal to 90, the color rendering requirement of the field of medical instruments on white light illumination can be met. The saturated red color rendering index (R9) is an index aiming at the color rendering capability of saturated red (or called dark bright red), when R9 is more than or equal to 80, the saturated red color rendering index can have high color reduction capability, can accurately reflect the detail information of red in the cavity (for example, the red color rendering index has strong color rendering capability on raw meat, bleeding points and the like), and when R9 is more than or equal to 90, the saturated red color rendering index can more accurately reflect the color information of the saturated red.

Thus, in some embodiments, in order to enhance the color rendering capability of saturated red in the white light illumination mode, so that the doctor can accurately distinguish the boundary between the lesion region and the normal tissue, judge the nature of the lesion, perform other relevant clinical operations, and the like based on the observed image in the white light observation mode, the combined light integrated by the dichroic filter assembly may have an average color rendering index greater than or equal to 90 and a saturated red color rendering index greater than or equal to 80 when the at least two light emitting components emit illumination light according to the first preset light emitting proportion.

Further, the specific numerical value of the color rendering index of the illumination light can be determined according to the emission spectrum thereof. Therefore, in the embodiment of the present application, the combined beam light having the average color rendering index (Ra) greater than or equal to 70 and the saturated red color rendering index (R9) greater than or equal to 80 (or the combined beam light having the average color rendering index greater than or equal to 90 and the saturated red color rendering index greater than or equal to 80) may be formed by spectral combination to improve the clinical diagnosis and treatment effects of the endoscope system.

Different light emitting components 11 and dichroic filter assemblies 12 may be selected for different spectral combinations.

For example, in some embodiments, when the at least two light emitting components 11 emit the illumination light according to the first preset light emitting ratio, the combined light integrated by the dichroic filter assembly 12 may be composed of white light having an average color rendering index greater than or equal to 90 and narrow-band red light having a peak wavelength between 640nm and 660nm, which is referred to as the first combined light.

Referring to fig. 2, fig. 2 is a graph illustrating a spectrum of a first combined beam of white light having an average color rendering index greater than or equal to 90 and narrow-band red light having a peak wavelength between 640nm and 660nm according to an embodiment of the present disclosure. The peak wavelength of the narrow-band red light is 640-660 nm, the half-peak width is 20nm, and the spectral value of the white light in a red light wave band can be enhanced. Based on the spectral graph, the average color rendering index Ra of the first combined beam light is 92.8, the saturated red color rendering index R9 is 95, and the color temperature CCT is 4965K.

Correspondingly, in order to be able to synthesize the above-mentioned first combined beam light, the at least two light emitting parts 11 may include: first white light emitting means for emitting the white light having an average color rendering index (Ra) of greater than or equal to 90 and first red light emitting means for emitting the narrow-band red light having the peak wavelength of 640nm to 660 nm; the dichroic filter assembly 12 includes a first dichroic filter having a transmission characteristic of reflecting a wavelength band in which the narrow-band red light is located and transmitting other wavelength bands (i.e., wavelength bands other than the wavelength band in which the narrow-band red light is located), or having a transmission characteristic of transmitting a wavelength band in which the narrow-band red light is located and reflecting other wavelength bands. It is understood that the transmission characteristics of the first dichroic filter may be determined according to the installation positions of the first white light emitting part and the first red light emitting part. For example, if the first white light emitting member is 11-1 and the first red light emitting member is 11-2 in the endoscope light source shown in fig. 1, the first dichroic filter has a transmission characteristic of transmitting a wavelength band in which the narrow-band red light is located and reflecting other wavelength bands; on the contrary, the first dichroic filter has the transmission characteristic of reflecting the waveband where the narrow-band red light is located and transmitting other wavebands.

For another example, in other embodiments, when the at least two light emitting components 11 emit the illumination light according to the first predetermined light emitting ratio, the combined beam light integrated by the dichroic filter assembly 12 may also be composed of blue light, green light, and broadband red light at least including a wavelength range of 600nm to 680nm, which is referred to as the second combined beam light.

Referring to fig. 3, fig. 3 is a graph illustrating a spectrum of a second combined beam of blue light, green light and broadband red light at least including a wavelength range of 600nm to 680nm according to an embodiment of the present disclosure. Wherein the peak wavelength of the blue light can be located in the range of 440-480nm waveband; the peak wavelength of the green light can be within the wavelength range of 520-540 nm; the broadband red light at least comprises a wave band range of 600 nm-680 nm. Based on the spectral graph, the average color rendering index Ra of the second combined beam light is 92.1, the saturated red color rendering index R9 is 96.9, and the color temperature CCT is 6368K.

Correspondingly, as a specific implementation manner of combining the second combined beam of light, the at least two light emitting components 11 may include: a blue light emitting component for emitting the blue light, a green light emitting component for emitting the green light, and a second red light emitting component for emitting the broadband red light at least including a wavelength range of 600nm to 680 nm;

the dichroic filter assembly 12 may include: a second dichroic filter and a third dichroic filter; the transmission characteristics of the second dichroic filter and the third dichroic filter may be determined based on the emission spectra and actual mounting positions of the blue light emitting member, the green light emitting member, and the second red light emitting member based on a conventional light combining principle, which will not be described in detail herein.

The blue light emitting component, the green light emitting component and the second red light emitting component respectively emit the blue light, the green light and the broadband red light at least including the range of 600 nm-680 nm wave bands according to a first preset light emitting proportion, and then the second combined beam light can be formed through integration of the second dichroic filter and the third dichroic filter.

Specifically, the blue light emitting component may be any light emitting component capable of emitting blue light as described above, and may be a blue LED or a blue LD.

The green light emitting component can be a green LED or a green LD.

The second red light emitting component may be a fluorescent red light LED, and specifically, may be a green light LED or an amber light LED that excites fluorescent powder coated on a light emitting surface of the green light LED or the amber light LED to emit broadband red light. Alternatively, the second red light emitting component may be a light emitting component with a plurality of light emitting elements (for example, LED patches) integrated on a light emitting surface, and the plurality of light emitting elements are configured to emit a plurality of red narrow-band lights which are distributed continuously and have different peak wavelengths from each other so as to form the broadband red light at least including the wavelength range of 600nm to 680 nm. The light emitting elements of all the red narrow-band light are integrated on the light emitting surface of the second red light emitting component, so that the second red light emitting component can emit broadband red light at least comprising a 600 nm-680 nm band range, and the design difficulty of the dichroic filter component cannot be increased.

Further, it is considered that the red light generated by the red LED is narrow-band light according to the principle of light emission; since the actual demand for red bandwidth is not much in the market, manufacturers generally do not make broad-spectrum red LEDs (i.e., fluorescent red LEDs as described above). That is, in the related art, it is difficult to generate broadband red light by a single light emitting part. Therefore, as another more convenient and lower-cost specific implementation way for synthesizing the second combined beam light, the wide-spectrum red light can also be obtained by filtering the white light through the dichroic filter.

For example, in some embodiments, the at least two light emitting members 11 may include: a blue light emitting component, a green light emitting component, and a second white light emitting component; a blue light emitting part for emitting blue light; a green light emitting component for emitting green light; the second white light emitting component is used for emitting white light;

the dichroic filter assembly comprises a fourth dichroic filter positioned on an emergent light path of the second white light emitting component, and white light emitted by the second white light emitting component forms broadband red light at least comprising a wavelength range of 600 nm-680 nm after passing through the fourth dichroic filter.

Further, in still other embodiments, in consideration of a large luminous flux of green light, in order to enhance the luminous flux of the emitted combined light, a light emitting member for providing green light (such as the above-described green light emitting member) may be made as close as possible to the light exit port (i.e., the light exit position of the combined light). Further, since the light flux is relatively less affected by the broadband red light, the light emitting means for generating the broadband red light can be located away from the light exit position of the combined light.

Based on the above technical solution, the endoscope light source provided by this embodiment can provide the combined illumination light with better color reproducibility, especially with high color reduction capability for saturated red, so that, when an endoscope system including the endoscope light source is used for clinical diagnosis and treatment, by emitting the combined illumination light, a doctor can accurately distinguish the boundary between a diseased region and normal tissue based on an observed image, judge the nature of a diseased region, and perform other related clinical operations conveniently.

Still further, it should be understood that, in order to realize other imaging modes, more light emitting parts may be included in the light emitting part of the endoscope light source provided in the embodiments of the present application; when the light emitting component emits illumination light according to other preset light emitting proportions, the combined light integrated by the dichroic filter component is the combined light suitable for the corresponding imaging mode.

For example, as shown in fig. 4, a schematic structural diagram of another endoscope light source provided in the embodiments of the present application is shown.

Specifically, the light emitting part 11 in the endoscope light source may include: a blue light emitting component 11a, a green light emitting component 11b, a second red light emitting component 11c and a violet light emitting component 11 d. Wherein the blue light emitting component 11a, the green light emitting component 11b and the second red light emitting component 11c may refer to the respective description in the previous embodiment. The blue-violet light emitting part 11d is for emitting blue-violet light shorter than the blue light.

The dichroic filter plate assembly 12 in the endoscope light source may include: a dichroic filter plate 12a, a dichroic filter plate 12, and a dichroic filter plate 12 c; the dichroic filter plate 12a may have a transmission characteristic of transmitting a wavelength band in which the blue-violet light is located and reflecting other wavelength bands other than the wavelength band in which the blue-violet light is located; the dichroic filter plate 12b may have a transmission characteristic of transmitting a wavelength band in which the blue-violet light and the blue light are located, and reflecting other wavelength bands except the wavelength band in which the blue-violet light and the blue light are located; the dichroic filter 12c may have a transmission characteristic of transmitting the blue-violet light, the blue light, and the broadband green light, and reflecting the broadband red light.

Therefore, in the embodiment, the combined beam light corresponding to different imaging modes can be formed only by adjusting the light emitting proportion of each light emitting component. Further, since the loss of each type of the formed combined light on the optical path is small, high-luminance illumination can be realized even in the special light mode.

Wherein it is to be understood that in the present embodiment the light emitting components comprise a blue light emitting component 11a, a green light emitting component 11b, a second red light emitting component 11c and a blue-violet light emitting component 11d, for exemplary illustration only; in practical applications, the light emitting component may also include the first white light emitting component, the first red light emitting component, and other light emitting components described above to provide multiple lighting modes.

Further, it should also be understood that, as shown in fig. 4, the endoscope light source may further include: storage section 13, mode switching section 14, and control section 15.

The storage unit 13 stores therein light emission ratio information (for example, the first light emission ratio and other light emission ratios described above) between blue light, blue-violet light, green light, and broad-band red light constituting the combined light prescribed in each illumination mode, light source information (for example, drive current information corresponding to the light quantity ranks of the light emitting parts, etc.) when the combined light is at different light emission brightness ranks by the light emitting parts corresponding to different illumination modes, mode switching priority information, and the like.

The mode switching unit 14 is used to switch between a plurality of lighting modes. In specific implementation, the lighting modes may be sequentially switched according to the priority order of the mode switching according to the mode switching priority information stored in the storage unit 13.

The control section 15 may control each light emitting section to emit blue light, blue-violet light, green light, and broad-band red light constituting the combined light in accordance with the light emission ratio corresponding to the illumination mode stored in the storage section 13, based on the switching instruction information from the mode switching section 14. The method specifically comprises the following steps: the switching instruction information from the mode switching unit 14 is received, and the preset drive current information of each light emitting component corresponding to different illumination modes stored in the storage unit 13 is read, so that the drive current of each light emitting component is controlled, and the ratio of the light emission intensity among the light emitting components 11a, 11b, 11c, and 11d is changed, thereby making the combined light have a spectral shape corresponding to the illumination mode specified by the mode switching unit 14. Further, the control part 15 may also change the light emitting intensity of the light emitting parts 11a, 11b, 11c, 11d according to the difference between the target brightness value transmitted by the dimming cable 4 and the brightness value of the current image to realize automatic dimming.

For example, the endoscope light source provided by this embodiment can realize three illumination modes, which are respectively denoted as: illumination pattern a, illumination pattern B, and illumination pattern C.

When the illumination mode a is selected, the control portion 15 controls the blue light emitting member 11a, the green light emitting member 11b, the second red light emitting member 11c and the blue-violet light emitting member 11d to emit illumination light at a first preset light emission ratio based on information prestored in the storage unit 13, and the light emission spectrum of the combined light integrated through the dichroic filter assemblies 12a to 12c may be as shown in fig. 3. In this illumination mode, since the average color rendering index Ra of the emission spectrum is 92.1 and the saturated red color rendering index R9 is 96.9, the entire color tone of the subject can be accurately reflected, and the color of the mucous membrane blood vessel, bleeding spot, and the like can be more faithfully reproduced while having a strong saturated red color rendering capability.

When the illumination mode B is selected, the control section 15 controls the blue light emitting member 11a, the green light emitting member 11B, the second red light emitting member 11c, and the blue-violet light emitting member 11d to emit illumination light at a second preset light emission ratio based on information prestored in the storage unit 13, and the combined light integrated through the dichroic filter assemblies 12a to 12c is composed of the green light and the blue-violet light. In the illumination mode, the spectral components of the light include only blue-violet light with the wavelength range of 400-450nm near the maximum absorption peak of hemoglobin and green light with the wavelength range of 500-550nm near the secondary absorption peak of hemoglobin, so that the light is beneficial to highlighting superficial mucosal blood vessels and middle mucosal blood vessels simultaneously.

When the illumination mode C is selected, the control section 15 controls the blue light emitting member 11a, the green light emitting member 11b, the second red light emitting member 11C, and the blue-violet light emitting member 11d to emit illumination light in accordance with a third preset light emission ratio based on information prestored in the storage unit 13, and the combined light integrated through the dichroic filter assemblies 12a to 12C is composed of the blue light, the green light, the broadband red light, and the blue-violet light. In this illumination mode, the spectral coverage is wide, so that high illumination brightness can be achieved, and the spectral components include blue-violet light in the wavelength range of 400-450nm near the maximum absorption peak of hemoglobin, so that the contrast of mucosal vessels can be highlighted.

In summary, the endoscope light source provided by the embodiment can provide the combined illumination light with better color reproducibility, especially with high color reduction capability to saturated red, so as to facilitate a doctor to accurately distinguish the boundary between a diseased region and normal tissues, judge the nature of the diseased region, and perform other related clinical operations; and multiple illumination modes can be realized by controlling the light emitting proportion of each light source with different wave bands, and enough illumination power can be provided during medium and long distance observation without an optical filter, so that the image brightness and the contrast are perfectly considered.

Fig. 5 is a schematic structural diagram of an endoscope system according to an embodiment of the present application, please refer to fig. 5, the endoscope system may include: an endoscope light source 1, an endoscope 3, an image processing apparatus 2, and a monitor 5. The endoscope light source 1 is detachably connected to the endoscope 3, and the image processing apparatus 2 is communicatively connected to the endoscope light source 1, the endoscope 3, and the monitor 5, respectively.

The endoscope light source 1 may be the endoscope light source described in any of the above embodiments, and may emit combined light having an average color rendering index (Ra) of 70 or more and a saturated red color rendering index (R9) of 80 or more.

The endoscope 3 includes a light guide portion 3a, an illumination portion 3b, an imaging portion 3c, and a signal transmission cable 3 d. The endoscope light source 1 is provided with a light guide holder 10 having a through hole so that the light guide portion 3a can be inserted into the through hole of the light guide holder 10 and receive the combined light emitted from the endoscope light source 1, and the combined light emitted from the endoscope light source 1 is transmitted to the illumination portion 3b, thereby irradiating the combined light to the object to be observed. The imaging unit 3c acquires reflected light from the object to be observed, converts the reflected light into an electric signal, generates a target image of the object to be observed, and transmits the target image to the image processing apparatus 2 via the signal transmission cable 3 d.

The image processing apparatus 2 may be any apparatus having an image processing capability, and for example, may specifically include a microprocessor for performing necessary image processing on the above-described target image received through the signal transmission cable 3d and outputting the processed image to the monitor 5 for display.

The image processing apparatus 2 may be further configured to calculate a luminance value of the target image and determine a difference between the luminance value and the target luminance value; the difference is transmitted to the endoscope light source 1 through the dimming cable 4, so that the endoscope light source 1 can adjust the light emission intensity of each light emitting part in real time according to the difference, thereby ensuring that the adjusted image brightness acquired by the image pickup part 3c is equivalent to the target brightness.

The monitor 5 may be any type of display device, which may include, but is not limited to: LCD display devices, OLED display devices, quantum dot display devices, or the like.

Based on the above technical solution, the endoscope system provided by this embodiment can provide a combined beam light having an average color rendering index (Ra) greater than or equal to 70 and a saturated red color rendering index (R9) greater than or equal to 80, and under the illumination of the combined beam light, the color tone of red substances such as polyps, bleeding spots, mucosal blood vessels, etc. can be reduced more truly, so that a doctor can accurately distinguish the boundary between a diseased region and normal tissues, judge the nature of a diseased region, and perform other relevant clinical operations based on the observed image.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The endoscope light source and the endoscope system provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.