阅读说明：本技术 一种硬管内窥镜照明系统 (A kind of rigid pipe endoscope lighting system ) 是由 刘小华 公鹏飞 于 2018-05-25 设计创作，主要内容包括：本发明公开了一种硬管内窥镜照明系统,该系统由保护片和光源构成,该系统将杂散光束的入射窗口由物镜的成像光束通光表面调整为物镜的侧表面,使成像光束与杂散光束的入射窗口的空间位置相互分离,因此,将杂散光束的入射窗口进行遮挡后不会影响成像光束的正常传播,在保持成像视场范围不变的前提下能够有效抑制杂散光束,提高硬管内窥镜的成像质量。(The invention discloses a kind of rigid pipe endoscope lighting systems; the system is made of screening glass and light source; the incident window of spuious light beam is adjusted to the side surface of object lens by the system by the imaging beam light passing surface of object lens; it is separated from each other imaging beam and the spatial position of the incident window of spuious light beam; therefore; it will not influence the normal propagation of imaging beam after the incident window of spuious light beam is blocked; spuious light beam can effectively be inhibited under the premise of keeping imaging field range constant, improve the image quality of rigid pipe endoscope.)

1. a kind of rigid pipe endoscope lighting system, which is characterized in that including light source and screening glass；Object lens are arranged in the light source In the groove of light passing marginal surface setting；The groove inner surface takes light-blocking processing；The screening glass is mounted on the groove Opening on.

2. a kind of rigid pipe endoscope lighting system as described in claim 1, which is characterized in that the light source is LED light source.

3. a kind of rigid pipe endoscope lighting system as claimed in claim 2, which is characterized in that the LED light source is LED patch Piece.

4. a kind of rigid pipe endoscope lighting system as described in claim 1, which is characterized in that the groove inner surface takes gear The mode of light processing is tint processing or frosted processing.

5. a kind of rigid pipe endoscope lighting system as described in claim 1, which is characterized in that the groove is circular ring shape.

6. a kind of rigid pipe endoscope lighting system as described in claim 1, which is characterized in that the groove is arc.

7. a kind of rigid pipe endoscope lighting system as claimed in claim 6, which is characterized in that the quantity of the groove is at least It is 2, uniformly distributed at object lens edge.

8. a kind of rigid pipe endoscope lighting system as described in claim 1, which is characterized in that the material of the screening glass is light Learn glass or optical plastic.

9. a kind of rigid pipe endoscope lighting system as described in claim 1, which is characterized in that the material of the object lens is optics Glass or optical plastic.

10. a kind of rigid pipe endoscope lighting system as claimed in claim 3, which is characterized in that the LED patch is described recessed It is uniformly distributed in slot.

Technical field

The invention belongs to endoscopic technique fields, and in particular to a kind of rigid pipe endoscope lighting system.

Background technique

Rigid pipe endoscope has boundless application value as a medical optical imaging instrument, improves image quality, drop Low manufacturing cost is its important developing direction.Under the guide in this direction, it is using the aspherical imaging of single mirror tube structure- System-LED light source front end illumination rigid pipe endoscope can make manufacturing cost decline to a great extent while improving image quality, be expected to complete Face replaces bimirror pipe structure-spherical imaging system-fiber optic bundle front end illumination traditional form rigid pipe endoscope, makes to peep in hard tube Mirror will become disposable medical instrument in future, avoid in use because disinfection, which is not thorough, leads to cross-infection etc. Potential problems.

As shown in Figure 1, outer telescop, lighting fiber, interior mirror tube, the first object lens are left using the rigid pipe endoscope of optical fibre illumination Side end face flushes, and all light emitted from lighting fiber can be incident on tissue surface, incident after surface is reflected Enter imaging system to the first objective lens surface, since front end does not need installation screening glass, will not generate is caused by screening glass Stray light the problem of.

As shown in Figure 2 using LED as when endoscope illumination element, it usually needs in the front end of LED light source, installation is round protects Bluff piece with guarantee using it is safe and by for the first time sterilize.The partial enlarged view of Fig. 2 is Fig. 3, due to joined front-end protection piece, The illuminating ray of LED light source transmitting, which will have small part, can not reach tissue surface, but directly from the surface reflection of screening glass, Imaging system is entered by the first objective lens entrance, is drawn with a dashed line that (under actual conditions, the forward and backward surface of screening glass all can in Fig. 3 It reflects, as schematic diagram, only depicts the light reflected in screening glass rear surface herein.In addition, LED light source is with before End screening glass not can guarantee unlimited closely fitting during the installation process, therefore can have certain the air gap, therefore always have A part of light is reflected from rear surface).Such is not that the light reflected from tissue surface is known as spuious light beam.From Fig. 2 and Fig. 3 energy Enough find out, imaging beam is identical as the incident window spatial position of spuious light beam, is the light passing surface of the first object lens.It is formed Spuious light beam will seriously affect the image quality of optical system, need that technological means is taken to improve endoscope illumination system thus System realizes that spuious light beam is eliminated or inhibited.

Summary of the invention

In view of this, spuious light beam suppression may be implemented the object of the present invention is to provide a kind of rigid pipe endoscope lighting system System improves the image quality of rigid pipe endoscope optical system.

The present invention has the advantages that.

Rigid pipe endoscope lighting system of the present invention, by the way that groove, light are arranged on the light passing marginal surface of object lens Source is arranged in a groove, and screening glass covers groove and is sealed to light source, while carrying out light-blocking processing in the inner surface of groove, with Traditional lighting system is compared, and the incident window of spuious light beam can be adjusted to object lens by the imaging beam light passing surface of object lens Side surface, be separated from each other imaging beam and the spatial position of spuious light beam incident window.Therefore, contralateral surface carries out technique The incident window that spuious light beam has only been blocked after processing does not influence the normal propagation of imaging beam, therefore is keeping imaging viewing field Spuious light beam can be effectively removed or inhibited under the premise of range is constant, improve the image quality of system.

Detailed description of the invention

Fig. 1 is the lighting method schematic diagram of the existing rigid pipe endoscope using optical fibre illumination.

Fig. 2 is the lighting method schematic diagram of the existing rigid pipe endoscope using LED illumination.

Fig. 3 is the partial enlarged view of Fig. 2.

Fig. 4 is the lighting system structure schematic diagram of rigid pipe endoscope of the invention.

The spuious Xanthophyll cycle schematic diagram of the lighting system of rigid pipe endoscope Fig. 5 of the invention.

Fig. 6 is the partial enlarged view of Fig. 5.

The structure for being machined with toroidal cavity object lens that Fig. 7 is shown by lighting system in one embodiment of the present of invention is shown It is intended to.

Fig. 8 is the schematic diagram that LED patch is distributed on doughnut-shaped substrate circuit in the present embodiment.

Fig. 9 is the schematic diagram of circular ring shape screening glass in the present embodiment.

The structure for being machined with arc groove object lens that Figure 10 is shown by lighting system in another embodiment of the invention Schematic diagram.

Figure 11 is the schematic diagram that LED patch is distributed on arc substrate circuit in the present embodiment, and LED patch number is 8.

Figure 12 is the schematic diagram of arc screening glass in the present embodiment.

Wherein, 1-screening glass, 2-LED patches, 3-base circuit boards, 4-object lens, 5-outer telescops, 6-interior mirror tubes, 7- lighting fiber, 8- tissue surface.

Specific embodiment

The present invention will now be described in detail with reference to the accompanying drawings and examples.

As shown in Fig. 2, a kind of rigid pipe endoscope lighting system of the invention, using LED illumination mode, object lens 4 are mounted on Inside outer telescop 5；Object lens 4 are arranged in towards on the surface of 8 side of tissue surface in lighting system of the invention, and are located at object lens 4 Edge；The lighting system is mounted in the groove of 4 edge of object lens, specifically includes screening glass 1, LED patch 2 and substrate Circuit board 3；LED patch 2 and base circuit board 3 are realized by welding manner is mechanically connected fixed and electrical connection, constitutes LED light Source；LED light source is mounted in the groove of 4 edge of object lens setting, and screening glass 1 is mounted on above LED light source, is realized to groove close Envelope, thus can protect LED light source.By the contour machining of screening glass 1 at consistent with groove profile；Screening glass 1 and object lens 4 Outer profile after being combined is circle, and the round diameter is approximately equal with the interior diameter of the mirror tube of rigid pipe endoscope.

The light beam that LED light source generates is irradiated to tissue surface 8 after largely penetrating screening glass 1, by the anti-of tissue surface 8 After penetrating, reflected light enters the optical system of endoscope by object lens 4, to realize the imaging to tissue surface.But meanwhile portion It is divided to stray light that may return in object lens 4 by 1 two surface reflections of screening glass, hence into endoscope optical system, Therefore, the present invention has carried out light-blocking processing in the inner surface of the groove of object lens 4, so that can not from the stray light that screening glass 1 reflects It enters in the optical system at 4 place of object lens.In order to realize light blocking effect, can be tinted in the inner surface of groove (such as apply It is black) or frosted processing, to stop spuious light beam completely, being allowed to can not be incident, and imaging beam is in the entrance window of optical system Mouth is still the light passing surface of object lens 4.

The material of object lens 4 is optical plastic or optical glass, the technique or die casting mode system being cold worked using optics It makes；Annular and two class of arc can be divided into according to bottom portion of groove profile, wherein profile is appearance such as Fig. 7 institute of annular object lens 4 Show, the object lens 4 of this form can be matched with the LED light source of the base circuit board 4 of 1 ring edge profile, or with number Mesh is that the LED light source of 1-4 curved edge profile base circuit boards 4 matches；Profile be arc object lens 4 appearance such as Shown in Figure 10, for processing the object lens 4 of 1 groove, the curved bottom profile according to actual operation requirements changeable object lens 4 is recessed The central angle of the number of slot, the relative position distribution for adjusting groove and bottom curved profile.

The material of screening glass 1 is optical glass or optical plastic, the technique or die casting mode being cold worked using optics Manufacture；Annular and two class of arc can be divided into according to its profile, wherein the appearance of the screening glass 1 of circular contour is as shown in figure 9, arc The appearance of the screening glass 1 of shape profile is as shown in figure 12.

Annular and two class of arc can be divided into according to the edge contour of base circuit board 4, wherein ring edge profile substrate electricity The appearance of road plate 4 can increase and decrease LED patch 2 according to actual use demand as shown in figure 8, for welding 8 LED patches 2 Number simultaneously adjusts welding position；The appearance of curved edge profile base circuit board 4 is as shown in figure 11, with 3 LED patches of welding in figure For piece 2, number, the distribution of adjustment welding position and the curved edge wheel of LED patch 2 can be increased and decreased according to actual use demand Wide central angle.

The groove inner surface of object lens 4 is subjected to light-blocking processing, then by screening glass 1, LED patch 2, base circuit board 3, object Mirror 4 is installed in the way of Fig. 3；The spuious light beam and imaging beam entrance window of rigid pipe endoscope lighting system of the invention The spatial position of mouth is separated from each other, and spuious light beam inhibition can be realized after carrying out process to groove inner surface, do not influence into As the normal propagation of light beam.

In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention. All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention Within protection scope.