CN214104377U - Slit lamp with embedded retina optometer - Google Patents
Slit lamp with embedded retina optometer Download PDFInfo
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- CN214104377U CN214104377U CN202022831613.3U CN202022831613U CN214104377U CN 214104377 U CN214104377 U CN 214104377U CN 202022831613 U CN202022831613 U CN 202022831613U CN 214104377 U CN214104377 U CN 214104377U
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- slit lamp
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Abstract
The utility model provides a slit lamp with an embedded retina optometer, which comprises a slit lamp body, the slit lamp body is provided with a retina optometer which comprises a vision detection light path formed by a light source device used for generating parallel light beams and a grating device which enables the parallel light beams generated by the light source device to be diffracted by a grating so as to generate interference fringes, the vision detection light path is vertical to an imaging light path of the slit lamp body, and a reflector for reflecting the diffracted light beams emitted by the vision detection light path to a dioptric system of the eye to be detected is arranged in the imaging light path, so that the slit lamp has the function of detecting the vision of the retina, for patients with retinal diseases of the eye fundus and cataract, the visual function of the eye fundus can be checked before cataract operation is performed, so that the postoperative visual level can be estimated.
Description
Technical Field
The utility model relates to an ophthalmology detector, in particular to slit lamp with embedded retina optometer.
Background
The existing ophthalmic optical instrument, slit lamp (slit lamp microscope), is an important and indispensable instrument for ophthalmology and optometry, and has been commonly used in hospitals and optometry institutions. The slit lamp is mainly used to inspect the anterior segment of the eyeball, i.e., the refractive portion of the eyeball. Cataract is a frequently encountered disease in ophthalmology and is also a blindness-causing disease. The slit lamp is the main diagnostic instrument for cataract, that is, it must be used for diagnosing cataract. For patients with retinal diseases of the eye fundus and cataract simultaneously, the retinal diseases are difficult to be detected due to the cataract, because the cataract's turbid crystalline lens blocks the optical path for examining the eye fundus. Therefore, the focus of the fundus is often clearly checked after cataract surgery. It would be of great value to be able to assess the visual performance of the fundus prior to cataract surgery.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a slit lamp with an embedded retinal visual acuity tester.
The slit lamp comprises a slit lamp body, wherein the slit lamp body is provided with a retina visual acuity chart, the retina visual acuity chart comprises a vision detection light path which is composed of a light source device used for generating parallel light beams and a grating device used for enabling the parallel light beams generated by the light source device to be diffracted through gratings so as to generate interference fringes, the vision detection light path is perpendicular to an imaging light path of the slit lamp body, and a reflector used for reflecting diffracted light beams emitted by the vision detection light path to a tested eye refraction system is arranged in the imaging light path.
The light source device comprises a monochromatic light source, a collecting lens and a light barrier which is arranged between the light source and the collecting lens, arranged on the focal surface of the collecting lens and provided with small holes.
The grating device is a grating disk vertical to the main optical axis, and the grating disk is provided with a plurality of grating sheets with different spatial frequencies.
The optometer is also provided with a relay prism used for adjusting the direction of diffraction beam interference fringes in a light path between the grating disk and the reflector, and the relay prism is a dove prism.
The utility model has the advantages that: the slit lamp with the embedded retina visual acuity tester can enable the slit lamp to have the function of testing the retina vision, and for patients with fundus retina diseases and cataract, the visual function of the fundus can be tested before cataract operation is carried out, so that the postoperative vision level can be estimated.
Drawings
Fig. 1 is a schematic diagram of an optical path in an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be further explained with reference to the accompanying drawings:
referring to fig. 1, a retina dynamometer is arranged on a microscopic component main body 8 of a slit lamp body, the retina dynamometer is directly fixed on the microscopic component main body 8 in an embedded mode, the retina dynamometer comprises a vision detection light path composed of a monochromatic light source 1, a light barrier 2 provided with a small hole, a condenser lens 3 and a grating disc 4, the vision detection light path is perpendicular to an imaging light path of the slit lamp, the slit lamp is provided with a reflector 6 for reflecting a diffraction light beam emitted by the vision detection light path to an eye refraction system to be detected, and the reflector is arranged on the imaging light path of the slit lamp and forms an included angle of 45 degrees with the imaging light path.
The monochromatic light source 1 is preferably a red LED light source having the longest visible light wavelength and strong penetrating power, which is convenient for observation, but suitable light emitting elements of other colors may be used.
The red LED light source 1 emits monochromatic light to irradiate the light barrier 2 provided with a light-transmitting small hole, the light passes through the small hole and emits parallel light beams through the condenser lens 3, the condenser lens 3 preferably adopts a collimating lens formed by a convex lens, stable parallel light beams are favorably generated, the parallel light beams generate diffraction phenomena through the grating disc 4, the grating disc 4 is provided with a plurality of grating sheets, the spatial frequency of each grating sheet can be determined according to the use requirement, each grating sheet generates a visual target with spatial frequency, and different eyesight can be detected by enabling the grating sheets with different spatial frequencies to enter the light path.
A relay prism 5 is arranged in the light path between the grating disk 4 and the reflector 6, when the direction of the interference fringe is adjusted, the direction of the interference fringe is changed by rotating the relay prism 5, and the relay prism is a dove prism or other relay prisms.
The reflector 6 reflects the diffracted light beam emitted by the vision detection light path to the objective 7 of the slit lamp, then forms interference fringes on the retina of the eye to be detected after passing through the dioptric system of the eye to be detected 9, the examiner can adjust the position of the light beam by taking the interference fringes as the visual target, so that the patient can read the visual target and read the vision by avoiding the turbid dioptric medium.
The examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of the present invention.
Claims (6)
1. The utility model provides a slit lamp with embedded retina eyesight, includes a slit lamp body, its characterized in that: the slit lamp comprises a slit lamp body, and is characterized in that a retina optometer is arranged on the slit lamp body, the retina optometer comprises a vision detection light path which is composed of a light source device used for generating parallel light beams and a grating device used for enabling the parallel light beams generated by the light source device to be diffracted through a grating so as to generate interference fringes, the vision detection light path is perpendicular to an imaging light path of the slit lamp body, and a reflector used for reflecting diffracted light beams emitted by the vision detection light path to a dioptric system of an eye to be detected is arranged in the imaging light path.
2. A slit lamp provided with an embedded retinal vision gauge as claimed in claim 1, wherein: the light source device comprises a monochromatic light source (1), a collecting lens (3) and a light barrier (2) which is arranged between the monochromatic light source (1) and the collecting lens (3), arranged on the focal surface of the collecting lens (3) and provided with small holes.
3. A slit lamp provided with an embedded retinal vision gauge as claimed in claim 1, wherein: the grating device is a grating disc (4) which is vertical to the main optical axis of the vision detection optical path.
4. A slit lamp provided with an embedded retinal vision gauge as claimed in claim 3, wherein: the grating disk (4) is provided with a plurality of grating sheets with different spatial frequencies.
5. A slit lamp provided with an embedded retinal vision gauge according to claim 3 or 4, characterized in that: the retina optometer is also provided with a relay prism (5) used for adjusting the direction of interference fringes formed by diffracted beams in a light path between the grating disc (4) and the reflector (6).
6. The slit lamp with embedded retina optometer of claim 5, wherein: the image rotating prism (5) is a dove prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022831613.3U CN214104377U (en) | 2020-12-01 | 2020-12-01 | Slit lamp with embedded retina optometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022831613.3U CN214104377U (en) | 2020-12-01 | 2020-12-01 | Slit lamp with embedded retina optometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214104377U true CN214104377U (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022831613.3U Active CN214104377U (en) | 2020-12-01 | 2020-12-01 | Slit lamp with embedded retina optometer |
Country Status (1)
| Country | Link |
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| CN (1) | CN214104377U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115517625A (en) * | 2022-11-29 | 2022-12-27 | 中南大学湘雅医院 | Slit lamp with embedded retina optometer |
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2020
- 2020-12-01 CN CN202022831613.3U patent/CN214104377U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115517625A (en) * | 2022-11-29 | 2022-12-27 | 中南大学湘雅医院 | Slit lamp with embedded retina optometer |
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