CN110353627B

CN110353627B - Binocular ophthalmoscope

Info

Publication number: CN110353627B
Application number: CN201810915041.1A
Authority: CN
Inventors: 郑阳; 张磊
Original assignee: Changchun University of Science and Technology
Current assignee: Changchun University of Science and Technology
Priority date: 2018-08-13
Filing date: 2018-08-13
Publication date: 2022-02-25
Anticipated expiration: 2038-08-13
Also published as: CN110353627A

Abstract

A binocular ophthalmoscope belongs to the technical field of medical instruments. In order to solve the problem that the existing ophthalmoscope can only form an inverted image, the ophthalmoscope consists of a first lens, a first reflecting mirror, a first Schmidt roof prism, and a second ophthalmoscope. reflector, third reflector, fourth reflector, fifth reflector, second lens, sixth reflector, seventh reflector, eighth reflector, second Schmidt roof prism, ninth reflector and The optical system composed of the third lens is arranged in the casing; the lighting system A is fixed on the upper part of the casing through a connecting rod with a rotating shaft 1 and a rotating shaft 2, and is used for illuminating the eyeball; The light is incident on the fifth reflector, and after being reflected by the fifth reflector, it enters the eyeball; it is applied to fundus surgery. After wearing this binocular ophthalmoscope, the doctor can directly observe the upright image of the patient's fundus without receiving special training. It can shorten physician training time and reduce training costs.

Description

Binocular ophthalmoscope

Technical Field

The invention relates to a binocular ophthalmoscope, which is applied to the observation and operation of ophthalmic diseases and belongs to the technical field of medical instruments.

Background

Ophthalmoscopes are the most commonly used medical devices for clinical fundus examination, and their use has become a fundamental work for ophthalmologists. Ophthalmoscopes can be divided into direct ophthalmoscopes and indirect ophthalmoscopes. The direct ophthalmoscope is an intuitive fundus observation device which is used earlier, but has no stereoscopic impression, shorter inspection range, smaller visual field and lower illumination brightness, so the application range is smaller. Indirect ophthalmoscopes, in particular binocular indirect ophthalmoscopes, have good stereoscopic impression, large visual field and high illumination brightness, overcome the defects of direct ophthalmoscopes to a considerable extent, and become the current preferred medical equipment for fundus examination.

U.S. patent publication No. US20080252851, which sets forth the imaging mechanism of a binocular indirect ophthalmoscope. The binocular ophthalmoscope forms an inverted image at the observation position through secondary imaging of the ocular lens and the objective lens. This causes the ophthalmologist to need to take an operation opposite to the observation direction in the eye surgery using the binocular indirect ophthalmoscope, which brings great inconvenience to the ophthalmologist. Ophthalmologists need to practice for a long time before mastering correct operation modes, and time cost for training and using of the doctors is increased.

Chinese patent publication No. CN102397054 discloses an "LED-illuminated binocular indirect ophthalmoscope", which proposes to use an LED as an illumination light source to improve the illumination defect of the binocular indirect ophthalmoscope. Chinese patent publication No. CN106551675 discloses a binocular indirect ophthalmoscope with a polarization function, which proposes to use a polarization device to reduce stray light so as to improve imaging sharpness. However, the images formed by the two patent publications are inverted.

Disclosure of Invention

The invention provides a binocular ophthalmoscope, aiming at solving the problem that the existing ophthalmoscope can only form an inverted image.

The technical scheme adopted by the invention is as follows:

a binocular ophthalmoscope is characterized in that an optical system consisting of a first lens, a first reflector, a first Schmidt roof prism, a second reflector, a third reflector, a fourth reflector, a fifth reflector, a second lens, a sixth reflector, a seventh reflector, an eighth reflector, a second Schmidt roof prism, a ninth reflector and a third lens is arranged in a shell; the illumination system A is fixed on the upper part of the shell through a connecting rod with a first rotating shaft and a second rotating shaft and is used for illuminating eyeballs; the illumination system B is arranged on the shell, and light emitted by the illumination system B is incident on the fifth reflector and is incident on the eyeball after being reflected by the fifth reflector;

light emitted by the eyeball is converged by the second lens and then divided into two paths, and the left path is reflected by the third reflector, the sixth reflector, the ninth reflector, the eighth reflector and the second Schmidt roof prism in sequence and then emitted by the third lens; and one path on the right side is reflected by the seventh reflector, the fourth reflector, the first reflector, the second reflector and the first Schmidt roof prism in sequence and then is emitted out through the first lens.

The invention has the beneficial effects that:

1. the binocular ophthalmoscope is applied to fundus surgery, and after a doctor wears the binocular ophthalmoscope, the upright image of the fundus of a patient can be directly observed, special training is not required, the training time of the doctor can be shortened, and the training cost is reduced.

2. The compact structure of the light path is beneficial to the miniaturization design of the volume, and the front-end lighting system can rotate at will, thus being beneficial to the adjustment of the lighting direction.

Drawings

Fig. 1 is a view of a binocular ophthalmoscope.

1. A first lens; 2. a first reflector; 3. a first schmitt roof prism; 4. a second reflector; 5. a third reflector; 6. an illumination system B; 7. a fourth mirror; 8. a fifth mirror; 9. a housing; 10. an eyeball; a sixth mirror; 11. an illumination system A; 12. a first rotating shaft; 13. a second rotating shaft; 14. a second lens; 15. a sixth mirror; 16. a seventh mirror; 17. an eighth mirror; 18. a second schmidt roof prism; 19. a ninth mirror; 20. a third lens.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the accompanying drawings.

As shown in fig. 1, a binocular ophthalmoscope includes an optical system 20 composed of a first lens 1, a first reflector 2, a first schmidt ridge prism 3, a second reflector 4, a third reflector 5, a fourth reflector 7, a fifth reflector 8, a second lens 14, a sixth reflector 15, a seventh reflector 16, an eighth reflector 17, a second schmidt ridge prism 18, a ninth reflector 19 and a third lens, and is disposed in a housing 9. The lighting system a11 is fixed on the upper part of the shell 9 through a connecting rod with a first rotating shaft 12 and a second rotating shaft 13 and is used for lighting the eyeball 10. The illumination system B6 is disposed on the housing 9, and light emitted therefrom is incident on the fifth reflecting mirror 8, reflected by the fifth reflecting mirror 8, and then incident on the eyeball.

Light emitted by the eyeball 10 is converged by the second lens 14 and then divided into two paths, and one path on the left side is reflected by the third reflector 5, the sixth reflector 15, the ninth reflector 19, the eighth reflector 17 and the second schmitt roof prism 18 in sequence and then emitted by the third lens 20. And one path on the right side is reflected by a seventh reflector 16, a fourth reflector 7, a first reflector 2, a second reflector 4 and a first Schmidt roof prism 3 in sequence and then is emergent through a first lens 1.

The third reflector 5, the fourth reflector 7, the sixth reflector 15 and the seventh reflector 16 are four identical hexagonal reflectors, the sixth reflector 15 and the third reflector 5 are arranged in parallel, and the fourth reflector 7 and the seventh reflector 16 are arranged in parallel. The included angle between the two reflecting surfaces of the third reflecting mirror 5 and the seventh reflecting mirror 16 is 120 degrees, and the included angle between the two reflecting surfaces of the fourth reflecting mirror 7 and the sixth reflecting mirror 15 is 120 degrees.

The third mirror 5, the fourth mirror 7, the sixth mirror 15, and the seventh mirror 16 cross-exchange the left and right positions of the fundus imaging optical path.

The ninth reflector 19 and the sixth reflector 15 form an included angle of 30 degrees. The included angle between the two reflecting surfaces of the first reflector 2 and the fourth reflector 7 is 30 degrees.

One waist surface of the first schmitt roof prism 3 is perpendicular to the optical axis of the first lens 1.

One waist surface of the second schmitt roof prism 18 is perpendicular to the optical axis of the third lens 20.

The first schmitt roof prism 3 and the second schmitt roof prism 18 are two identical prisms, and the placing positions are symmetrical.

The optical system composed of the second lens 14 and the first lens 1 is an image enlarged in an inverted state.

The optical system composed of the second lens 14 and the third lens 20 is an image enlarged in an inverted state.

Claims

1. A binocular ophthalmoscope is characterized by comprising an optical system, wherein the optical system is composed of a first lens (1), a first reflector (2), a first Schmidt ridge prism (3), a second reflector (4), a third reflector (5), a fourth reflector (7), a fifth reflector (8), a second lens (14), a sixth reflector (15), a seventh reflector (16), an eighth reflector (17), a second Schmidt ridge prism (18), a ninth reflector (19) and a third lens (20) and is arranged in a shell (9);

the eyeball illumination device also comprises an illumination system A (11) which is fixed at the upper part of the shell (9) through a connecting rod with a first rotating shaft (12) and a second rotating shaft (13) and is used for illuminating the eyeball (10);

the illumination system B (6) is arranged on the shell (9), and light emitted by the illumination system B is incident on the fifth reflector (8) and is incident on the eyeball (10) after being reflected by the fifth reflector (8);

light emitted by the eyeball (10) is converged by a second lens (14) and then divided into two paths, and one path on the left side is reflected by a third reflector (5), a sixth reflector (15), a ninth reflector (19), an eighth reflector (17) and a second Schmidt roof prism (18) in sequence and then emitted by a third lens (20); one path on the right side sequentially passes through a seventh reflector (16), a fourth reflector (7), a first reflector (2), a second reflector (4) and a first Schmidt roof prism (3) for reflection and then is emitted out through a first lens (1);

the third reflector (5), the fourth reflector (7), the sixth reflector (15) and the seventh reflector (16) are four identical hexagonal reflectors, the sixth reflector (15) and the third reflector (5) are arranged in parallel, and the fourth reflector (7) and the seventh reflector (16) are arranged in parallel; the included angle of two reflecting surfaces of the third reflecting mirror (5) and the seventh reflecting mirror (16) is 120 degrees, and the included angle of two reflecting surfaces of the fourth reflecting mirror (7) and the sixth reflecting mirror (15) is 120 degrees.

2. A binocular ophthalmoscope according to claim 1, characterised in that the ninth mirror (19) is angled at 30 ° to the reflective surfaces of the sixth mirror (15); the included angle of the two reflecting surfaces of the first reflector (2) and the fourth reflector (7) is 30 degrees.

3. A binocular ophthalmoscope according to claim 1, wherein the first schmitt roof prism (3) and the second schmitt roof prism (18) are two identical prisms and are arranged in bilateral symmetry;

one waist surface of the first Schmidt roof prism (3) is vertical to the optical axis of the first lens (1), and one waist surface of the second Schmidt roof prism (18) is vertical to the optical axis of the third lens (20).