CN103293655A

CN103293655A - Technology for improving lighting effect of edge of rigid tube endoscope

Info

Publication number: CN103293655A
Application number: CN201210051234XA
Authority: CN
Inventors: 刘小华; 彭涛; 公鹏飞; 李永宏; 郭秀环; 汤燕子
Original assignee: WTI (BEIJING) ASIA-PACIFIC PHOTOELECTRIC INSTRUMENT Co Ltd
Current assignee: WTI (BEIJING) ASIA-PACIFIC PHOTOELECTRIC INSTRUMENT Co Ltd
Priority date: 2012-03-01
Filing date: 2012-03-01
Publication date: 2013-09-11

Abstract

The invention discloses a technology for improving a lighting effect of the edge of a rigid tube endoscope and relates to the technology of industrial and medical testing instruments. The technology can solve the problem that uneven lighting of an observation filed is caused by limited numerical apertures of lighting optical fibers used by various rigid tube endoscopes and the limited installation number of the optical fibers. Multi-component glass optical fibers with large numerical apertures are arranged between an inner tube and an outer tube of the rigid tube endoscope and used for increasing a light-pervious filed. A cylindrical cone body is added at the outer wall of the inner tube, surface sizing is carried out on the optical fibers, when the end portions of the optical fibers are pressed to be deformed and solidified by glue, the optical fibers are shifted out, the end portions of the optical fibers between the inner tube and the outer tube of the rigid tube endoscope are bent towards the outer side, therefore lighting of the edge of the observation field is enhanced, and light intensity differences between the center and the edge of the field are reduced. The technology is used for improving the lighting effect of the edge of the rigid tube endoscope.

Description

A kind of technology for improvement of hard tube endoscope edge light efficiency

Technical field

The present invention relates to a kind of technology that is applied to industry and medical treatment detection apparatus.

Background technology

Endoscope both can be used as the medical optical instrument of diagnosis and treatment, also can be used as industrial detection equipment, had had to go up century-old history.Though fiberscope, fujinon electronic video endoscope and ultrasonic electronic mirror have appearred now, medical and industrial hard tube endoscope still with the picture element of its high-quality, Minimally Invasive Surgery equipment, cheap price and can the high temperature high voltage resistant sterilization etc. advantage be used widely.Various hard tube endoscopes all require polishing even, and this is for detecting and treating all very important.There is an index to explicitly call for the edge light efficiency that detects rigid endoscope, the i.e. ratio of illumination field of view central light strength and edge light intensity in the new rigid endoscope test stone of promulgating of Bureau of Drugs Supervision of country.Because all there is limited numerical aperture in the used lighting fiber of various hard tube endoscopes; therefore the light angle that penetrates from the optical fiber exit end all is restricted; in principle if use lighting fiber all ubiquity observe the problem of illumination unevenness in the visual field; the speck that the center is bright excessively namely in illumination field of view, occurs, and the visual field is very gloomy on every side.In order to see the scenery at center, visual field clearly, just must adjust the brightness of light source during use, make the center so not dazzling, the result just causes field of view edge darker, makes the big field angle of endoscope lose meaning.Even if select large-numerical aperture optical fiber for use, but because the hard tube endoscope settles the space of optical fiber limited, the optical fiber of limited quantity can only be installed, so all there is the problem of illumination unevenness at present domestic and international existing procucts.The present invention proposes a kind of technology that improves hard tube endoscope edge light efficiency, can thoroughly solve from the endoscope insurmountable illumination unevenness problem over 100 years of coming out.

Summary of the invention

The present invention relates to a kind of new technology of the edge light efficiency for improvement of rigid endoscope.Be example with 0 degree 4mm mirror, adopting said method can solve the problem of illumination unevenness in and the hard tube endoscopic observation visual field that optical fiber installation limited amount causes limited owing to Optical Fiber Numerical Aperture.Concrete summary of the invention is as follows:

1. pack between the inner and outer pipes of the hard tube endoscope multicomponent glass optical fiber of large-numerical aperture is used for increasing logical light visual field, improves logical luminous energy power, and the numerical aperture of light is not less than 0.6;

2. optical fiber front end gluing, add the cylinder cone at the outer wall of inner tube place, treat to shift out after optical fiber end compressive deformation between the inner and outer pipes and the adhesive curing, make optical fiber end crooked laterally, the reinforcement that the marginal position of hard tube endoscopic observation visual field is thrown light on, improve visual field, edge light intensity, thereby improve the edge light efficiency of hard tube endoscope.

Description of drawings

Fig. 1 is the hard tube endoscope synoptic diagram after the adding cylinder cone;

Fig. 2 be shift out the cylinder cone and do cutting and polishing after hard tube endoscope synoptic diagram.

Embodiment

(1) select multicomponent glass optical fiber for use, NA is greater than 0.6 for its numerical aperture, is used for providing the illumination field of view greater than 70 °;

(2) optical fiber is packed between the inner and outer pipes of hard tube endoscope, and to the optical fiber gluing;

(3) the cylinder cone is inserted outer wall of inner tube, after treating adhesive curing, shift out the cylinder cone, make optical fiber end crooked laterally, thereby strengthened observing the illumination of field of view edge, reduce the light-intensity difference at center, visual field and edge, improved the edge light efficiency of hard tube endoscope, solved the problem of illumination unevenness;

(4) cut the optical fiber that exceeds the preceding minute surface of hard tube endoscope, and the fiber end face after the cutting is carried out sanding and polishing, make its end face smooth.

Claims

1. the present invention selects for use the multicomponent glass optical fiber of large-numerical aperture to be put between the inner and outer pipes of hard tube endoscope, add the cylinder cone at the outer wall of inner tube place, gluing, treat to shift out behind the optical fiber end compressive deformation and after the adhesive curing, make that the optical fiber end between the inner and outer pipes is crooked laterally, marginal position to hard tube endoscopic observation visual field throws light on, and the illumination field of view greater than 70 ° can be provided.

2. according to the described optical fiber of claim 1, it is characterized in that selecting for use multicomponent glass optical fiber, its numerical aperture NA is not less than 0.6.

3. according to the described cylinder cone of claim 1, it is characterized in that being put in outer wall of inner tube, the gluing of optical fiber front end, treat behind the optical fiber end compressive deformation between the inner and outer pipes and shift out after the adhesive curing, make optical fiber end crooked laterally, strengthened having reduced the light-intensity difference at center, visual field and edge to observing the illumination of field of view edge.