阅读说明：本技术 用于控制眼科设备的照度的方法 (Method for controlling illuminance of ophthalmic device ) 是由 戴维·戈尔茨 迪特里希·马丁 于 2019-08-15 设计创作，主要内容包括：本发明涉及用于控制眼科设备的照度的方法,该眼科设备具有观察模式和记录模式。所提出的方法用于调整来自包括观察模式和记录模式的眼科设备的照度,并且在记录模式的持续时间内,来自眼科设备的照度增加到高于辐射通量的指定值Φ-(soll)。根据本发明,照度在记录模式内增加到高于指定值Φ-(soll)的辐射通量,并且在记录模式结束之后的指定时间段内降低到低于辐射通量的指定值Φ-(soll)的辐射通量。尽管主要为裂隙灯显微镜提供用于调整照度的所提出的方法,但是原则上,该方法可以用于具有观察模式和记录模式两者的所有眼科设备,其中眼科设备在记录模式中实现高质量的、良好照度的记录。(The present invention relates to a method for controlling illuminance of an ophthalmologic apparatus having an observation mode and a recording mode. The proposed method is used to adjust the illuminance from an ophthalmic device comprising an observation mode and a recording mode, and during the duration of the recording mode the illuminance from the ophthalmic device is increased to a specified value Φ above the radiation flux soll . According to the invention, the illuminance is increased above a specified value phi in the recording mode soll And decreases below a specified value Φ of the radiation flux within a specified time period after the end of the recording mode soll The radiant flux of (a). Although the proposed method for adjusting the illumination is mainly provided for slit-lamp microscopesThe method, but in principle, can be used for all ophthalmological apparatuses having both an observation mode and a recording mode, wherein the ophthalmological apparatus achieves high-quality, good-illuminance recording in the recording mode.)

1. A method for adjusting an illuminance from an ophthalmic apparatus, the ophthalmic apparatus comprising an observation mode and a recording mode, in which ophthalmic apparatus the illuminance increases above a specified value Φ of a radiation flux for the duration of the recording mode_sollWherein the illumination increases above the specified value Φ during the recording mode_sollAnd decreases below the specified value Φ of the radiation flux within a certain time period after the end of the recording mode_sollRadiation flux phi of_min。

2. The method of claim 1, wherein the illumination increases above the specified value Φ_sollCorresponds to the exposure time of the recording unit employed.

3. Method according to claims 1 and 2, characterized in that above the specified value Φ_sollCorresponding to the maximum radiation flux phi allowed by the standard_max。

4. Method according to claims 1 and 3, characterized in that the illuminance is increased to the maximum radiant flux Φ allowed by a standard_maxIs synchronized with the exposure time of the employed recording unit.

5. Method according to claim 1, characterized in that the reduction below the specified value Φ of the radiant flux is carried out_sollSaid radiation flux phi_minIs set such that the mean radiation flux phi is taken into account over the entire treatment duration_resCorresponding to the specified value phi_soll。

6. Method according to claims 1 and 5, characterized in that the radiation flux Φ_minTo a minimum value, or to 0, so as to increase to radiation flux phi_sollIs minimized.

7. A method according to claim 1, characterized in that the variation of the radiation flux Φ is implemented in the form of rectangular pulses.

8. A method according to claims 1 and 7, characterized in that the variation of the radiation flux Φ is implemented in the form of rectangular pulses consisting of a plurality of levels of different power.

9. Method according to claims 7 and 8, characterized in that the variation of the radiation flux Φ is implemented in the form of a ramp function.

Technical Field

The present invention relates to a method for controlling illuminance of an ophthalmologic apparatus including an observation mode and a recording mode.

Background

According to the known prior art, in such ophthalmic devices (such as, for example, slit lamps, fundus cameras, etc.), the radiation flux of the illumination source is increased during the recording mode in order to produce high-quality, light-rich recordings.

WO 2012/169416a1 describes a corresponding slit-lamp microscope. To this end, the slit-lamp microscope comprises an optical illumination system, an optical examination and imaging system and a control unit. The illumination system is controlled by the control unit such that continuous illumination is provided for examination and pulsed illumination is provided for imaging. The pulsed illumination is preferably synchronized with the imaging system in order to be able to capture images of the eye during the examination. Since in the proposed case LEDs are used as lighting system, only the control current is needed. Furthermore, the control unit is capable of capturing and/or setting the maximum luminous energy in order to comply with safety standards.

Another system and method for controlling the light source of a slit-lamp microscope is described in CN 102755149. For eye examination, in this case, the light source is set to a luminance level at which the eyes feel comfortable. In contrast, the luminance of the light source is set to a higher value during image recording. During image recording, the maximum brightness of the light source corresponds to the exposure time of the camera. Once the image recording is completed, the control unit reduces the luminance to the inspection luminance.

In the methods known in the prior art for controlling the illumination of a slit-lamp microscope, the radiation flux is set to a specified value Φ for the examination of the eye_soll。

The radiation flux increases to the maximum radiation flux phi allowed by the standard for image recording_maxThen lowered to the specified value phi for eye examination_soll。

For this purpose, fig. 1 shows the time course of the radiation flux Φ during the examination of the eye and recording of an image of the eye, wherein

Φ_sollIndicating a specified value of radiation power for inspection purposes,

Φ_maxrepresenting the maximum radiation power allowed by the standard for recording images of the eye,

Φ_resrepresents the resulting average radiant flux of the treatment,

t₀the time at which the treatment is to be started is indicated,

t₁indicating the time at which the recording of the image started,

t₂indicates the time when the image recording is ended, and

t₄indicating the time at which treatment was ended.

An advantage of increasing the radiation flux during image recording is that the quality of the image recording is significantly improved.

However, this is disadvantageous in the following effects: at a time from t₀To t₃Of the total treatment duration of the considered average radiation flux phi_resGreater than a specified value phi_soll。

Resulting average radiant flux Φ_resDeviation from a given value phi_sollIs dependent firstly on the ratio phi_res:Φ_sollSecondly on the image recording (t)₂-t₁) Duration of (d) and duration of treatment (t)₀→t₄) The ratio of (a) to (b).

Disclosure of Invention

The invention is based on the object of developing a solution which remedies the disadvantages of the solutions known from the prior art and in which the resulting average radiant flux does not exceed a specified value of the radiant flux when the entire treatment process is taken into account, the specified value being set so as to be pleasant to the eye.

The proposed method for adjusting the illuminance from an ophthalmological apparatus by increasing the illuminance in recording mode to the maximum radiation flux Φ allowed by the standard_maxAnd falls to low for a specified period of time after the end of the recording modeAt a given value of radiant flux phi_sollThis object is achieved in that the ophthalmic apparatus comprises an observation mode and a recording mode, wherein the illumination is increased above a specified value Φ of the radiation flux for the duration of the recording mode_soll。

According to the invention, this object is achieved by the features of the independent claims. Preferred developments and embodiments are the subject matter of the dependent claims.

According to an advantageous configuration, the illuminance is increased to the maximum radiant flux Φ allowed by the standard_maxCorresponds to the exposure time of the employed recording unit and is preferably synchronized with the exposure time of the employed recording unit.

According to the invention, to a specified value phi below the radiant flux_sollIs set such that the resulting average radiation flux phi, when the entire treatment duration is taken into account_resCorresponding to a specified value phi_soll。

Although the proposed method for adjusting the illumination is primarily provided for slit-lamp microscopes, it can in principle be used for ophthalmological apparatuses comprising both an observation mode and a recording mode, which aim at achieving a high-quality, well-lighted recording in the recording mode.

Drawings

The invention is described in detail below on the basis of exemplary embodiments, in which connection:

FIG. 1: shows a time curve of the radiation flux phi during the treatment of the eye according to known methods, and

FIG. 2: a time curve of the radiation flux phi during treatment of the eye for the proposed method is shown.

Detailed Description

The proposed method is used to adjust the illuminance from an ophthalmic device comprising an observation mode and a recording mode, and during the duration of the recording mode the illuminance from the ophthalmic device is increased to a specified value Φ above the radiation power_soll。

According to the invention, the illumination is in the recording modeInternal increase above a specified value phi_sollAnd decreases below a specified value Φ of the radiation flux within a specified time period after the end of the recording mode_sollRadiation flux phi of_min。

According to a first advantageous configuration, the illuminance increases above a specified value Φ_sollCorresponds to the exposure time of the employed recording unit.

Here, it is particularly advantageous if the duration of the increase in the illumination is synchronized with the exposure time of the recording unit employed.

According to a second preferred configuration, above a specified value Φ_sollCorresponding to the maximum radiation flux phi allowed by the standard_max。

According to an advantageous configuration, to below a specified value Φ of the radiant flux_sollRadiation flux phi of_minIs set such that the average radiation flux phi, when considered over the treatment duration, is_resCorresponding to a specified value phi_soll。

In this case, the radiation flux is reduced to a minimum value Φ_minOr to 0 in order to bring it up to the achievement ratio phi_res:Φ_sollThe duration of 1 is minimized.

For this purpose, fig. 2 shows the time course of the radiation flux Φ during the examination of the eye and recording of an image of the eye using the method according to the invention, wherein

Φ_sollIndicating a specified value of radiation power for inspection purposes,

Φ_maxrepresenting the maximum radiation power allowed by the standard for the purpose of recording an image of the eye,

Φ_minindicating a reduced minimum radiant flux and,

Φ_resrepresents the resulting average radiant flux of the treatment,

t₀the time at which the treatment is to be started is indicated,

t₁indicating the time at which the recording of the image started,

t₂indicating the time at which the recording of the image ended,

t₃indicates the time at which treatment can be continued, an

t₄Indicating the time at which treatment was ended.

In contrast to the time curve of the radiation flux phi shown in fig. 1, the radiation flux phi is at time t₂(end of image recording) to a specified value phi below the radiation flux_sollRadiation flux phi of_minAnd at time t₃Again to a specified value of radiant flux phi_sollSo that treatment can continue.

Satisfying the mean radiant flux phi when considered over the entire treatment duration_resCorresponding to a specified value phi_sollIn the case of the conditions of (1), the ratio Φ should also be considered here_res:Φ_sollAnd duration of image recording (t)₂-t₁) And duration of treatment (t)₀→t₄) The ratio of (a) to (b).

Here, during a time period t₀To t₁And t₃To t₄On the assumption that the medium radiation flux corresponds to a given value, t₂-t₁And t₃-t₂The ratio between is decisive. Thus, an excessive radiation flux t in the time period₂-t₁Must pass through during the time period t₃-t₂Less radiant flux during the period.

Furthermore, it has to be taken into account that image recording is reduced to a radiation flux Φ_minDuration (t) of₃-t₂) And a specified value phi of the radiation flux_sollThe ratio of (a) to (b).

In detail, the resulting average radiation flux Φ once treated_resEqual to a specified value of radiant flux phi_sollThe illumination will increase again and the imaging system has finished processing the recorded image and is ready for reuse.

By reactivating the light source, the device indicates to the user to re-prepare the examination or image recording.

According to another advantageous configuration, the variation of the radiation flux Φ is implemented in the form of rectangular pulses. This can also be taken from fig. 1 and 2.

Preferably, the variation of the radiation flux Φ can also be implemented in the form of rectangular pulses consisting of a plurality of levels of different power. This is advantageous, for example, if a series of images should be recorded.

However, the variation of the radiation power Φ can also be implemented in the form of a ramp function.

The solution according to the invention provides a method by which the illumination from the ophthalmic apparatus can be adapted to the observation mode or the recording mode.

In particular, the illuminance may be increased to above a specified value Φ of the radiation flux for the duration of the recording mode_sollIn which the illuminance is increased to the maximum radiation flux phi allowed by the standard for the recording mode_maxAnd decreases below a specified value phi of the radiation flux for a specified period of time after the end of the recording mode_sollRadiation flux phi of_min。

The invention ensures that the average radiation flux phi obtained when the whole treatment is considered_resNot exceeding a specified value phi of the radiation flux set to make the eye feel comfortable_soll。

The proposed method is applicable to all ophthalmic devices comprising an observation mode and a recording mode and is intended for achieving high-quality, well-lighted recording in the recording mode.