CN214965415U - Optical system structure and optical system of fundus camera illuminating lens group - Google Patents
Optical system structure and optical system of fundus camera illuminating lens group Download PDFInfo
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- CN214965415U CN214965415U CN202023087274.9U CN202023087274U CN214965415U CN 214965415 U CN214965415 U CN 214965415U CN 202023087274 U CN202023087274 U CN 202023087274U CN 214965415 U CN214965415 U CN 214965415U
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Abstract
The utility model discloses an fundus camera lighting mirror group optical system structure and optical system, including visible light illumination back group, the illumination front group, big objective, low logical piece, the black point board, first diaphragm, third diaphragm and infrared lighting system, visible light passes through first ground glass, shine behind the first diaphragm on the visible light illumination back group, then through low logical piece, the black point board, get into the illumination front group behind the aperture diaphragm, infrared lighting system is located illumination front group below, including the second diaphragm, the near infrared light of infrared lamp circle transmission passes through second ground glass, shine behind the second diaphragm on the infrared illumination back group, then through low logical piece, the black point board, get into the illumination front group behind the aperture diaphragm, light is through the third diaphragm behind the illumination front group, big objective gets into the eyeball. Through extremely simple lens group, realized the even effect of illumination eye ground, when can realizing that the structure is small and exquisite, satisfy the observation and the formation of image function of eye ground camera, it is with low costs.
Description
Technical Field
The utility model relates to an optical system structure and optical system are organized to fundus camera illumination mirror belongs to eye ground camera technical field.
Background
Fundus photography is a widely used diagnostic item in ophthalmology, and the blood vessels of the fundus are the only blood vessels that can be directly observed through the body surface of the human body. Using a fundus camera, a physician can examine the fundus for the presence of lesions in the optic nerve, retina, choroid, and dioptric media. Meanwhile, other system diseases such as cerebral infarction, cerebral hemorrhage, cerebral arteriosclerosis, brain tumor, diabetes, nephropathy and hypertension can be diagnosed and disease condition judged with the help of the fundus camera.
The existing fundus camera is desk type and handheld type, the desk type is large in structural size, and the design of each lens group can be met by more complicated and more lenses. The volume of hand-held type is less, but structural design is simple, can not satisfy the even demand of illumination.
SUMMERY OF THE UTILITY MODEL
To the above technical problem, the utility model discloses a first aim at provides an eye end camera lighting mirror group optical system structure, and second aim at provides an eye end camera optical system, through extremely simple lens group, has realized the even effect of illumination eye ground.
In order to realize the first purpose, the technical scheme of the utility model is that: an optical system structure of an illumination lens group of a fundus camera is characterized in that: comprises a visible light illumination rear group, an illumination front group, a large objective lens, a low-pass film, a black spot plate, a first diaphragm, a third diaphragm and an infrared illumination system, the visible light illumination rear group consists of at least one focusing lens, visible light irradiates the visible light illumination rear group after passing through the first ground glass and the first diaphragm, then enters a front lighting group after passing through a low-pass sheet, a black spot plate and an aperture diaphragm, the front lighting group consists of at least one focusing lens, the infrared illumination system is positioned below the illumination front group and comprises a second diaphragm, near infrared light emitted by the infrared lamp ring irradiates the infrared illumination rear group after passing through second ground glass and the second diaphragm, then the light enters the front illumination group after passing through the low-pass film, the black spot plate and the aperture diaphragm, the light enters the eyeball after passing through the front illumination group through the third diaphragm and the large objective lens, and the rear infrared illumination group also comprises at least one focusing lens.
In the scheme, the method comprises the following steps: the infrared lamp ring emits near infrared light with the wavelength of 850 nm.
In the scheme, the method comprises the following steps: the low-pass piece is an infrared reflection low-pass piece.
The second purpose of the utility model is realized like this: the utility model provides a fundus camera optical system, includes illumination mirror group optical system structure and imaging system structure, its characterized in that: the optical system structure of the illuminating lens group is the optical system structure of the illuminating lens group, the imaging system structure comprises a large objective lens, a zoom lens group and an imaging lens group, and an image of the fundus comes out from a pupil, passes through the large objective lens to the zoom lens group and then passes through the imaging lens group to the image acquisition device.
In the scheme, the method comprises the following steps: the image acquisition device is a CCD camera or an externally purchased lens component.
The utility model discloses following beneficial effect has: the utility model discloses an extremely simple lens group has realized the even effect of illumination eye ground, through practice, and this kind of structural design when can realize that the structure is small and exquisite, satisfies the observation and the formation of image function of eye ground camera, and is with low costs.
Drawings
Fig. 1 is a schematic structural view of the optical system of the lighting lens assembly of the present invention.
Fig. 2 is a schematic structural diagram of the imaging system of the present invention.
Fig. 3 is a partially enlarged view of the frame a in fig. 1.
Detailed Description
The invention will be further described by way of examples with reference to the accompanying drawings:
example 1
As shown in fig. 1-3, the optical system of the fundus camera illumination lens group consists of an illumination lens group optical system structure and an imaging system structure.
The structure of the optical system of the illuminating lens group consists of a visible light illuminating rear group 1, an illuminating front group 2, a large objective lens 3, a low-pass sheet 4, a black spot plate 5, a first diaphragm 6, a third diaphragm 7, a first frosted glass 8, a second diaphragm 9, a second frosted glass 10, an aperture diaphragm 11, a second diaphragm 12 and an infrared illuminating rear group 13.
The visible light front group 1 is composed of at least one focusing lens, visible light irradiates the visible light rear group 1 after passing through a first ground glass 8 and a first diaphragm 6, then enters the illumination front group 2 after passing through a low-pass sheet 4, a black spot plate 5 and an aperture diaphragm 11, the illumination front group 2 is composed of at least one focusing lens, three focusing lenses are shown in the figure, and the first focusing lens, the second focusing lens and the third focusing lens are respectively arranged from left to right. The infrared illumination system is located below the front illumination group 2 and comprises a second diaphragm 9, near infrared light emitted by an infrared lamp ring irradiates the rear infrared illumination group 13 after passing through a second ground glass 10 and a second diaphragm 12, then enters the front illumination group 2 after passing through a low-pass plate 4, a black spot plate 5 and an aperture diaphragm 11, and enters eyeballs after passing through the front illumination group 2 and passing through a third diaphragm 7 and a large objective 3, and the rear infrared illumination group 13 also comprises at least one focusing lens. The infrared lamp ring emits near infrared light with the wavelength of 850 nm.
The imaging system structure comprises a large objective lens 3, a zoom lens group 14 and an imaging lens group 15, wherein an image of the fundus comes out from a pupil, passes through the large objective lens 3 to the zoom lens group 14, and then passes through the imaging lens group 15 to an image acquisition device. The image acquisition device is a CCD camera or a purchased lens component.
The present invention is not limited to the above embodiments, and those skilled in the art can understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. An optical system structure of an illumination lens group of a fundus camera is characterized in that: comprises a visible light illumination rear group, an illumination front group, a large objective lens, a low-pass film, a black spot plate, a first diaphragm, a third diaphragm and an infrared illumination system, the visible light illumination rear group consists of at least one focusing lens, visible light irradiates the visible light illumination rear group after passing through the first ground glass and the first diaphragm, then enters a front lighting group after passing through a low-pass sheet, a black spot plate and an aperture diaphragm, the front lighting group consists of at least one focusing lens, the infrared illumination system is positioned below the illumination front group and comprises a second diaphragm, near infrared light emitted by the infrared lamp ring irradiates the infrared illumination rear group after passing through second ground glass and the second diaphragm, then the light enters the front illumination group after passing through the low-pass film, the black spot plate and the aperture diaphragm, the light enters the eyeball after passing through the front illumination group through the third diaphragm and the large objective lens, and the rear infrared illumination group also comprises at least one focusing lens.
2. The fundus camera illumination lens group optical system structure as described in claim 1, wherein: the infrared lamp ring emits near infrared light with the wavelength of 850 nm.
3. The fundus camera illumination lens group optical system structure as described in claim 1, wherein: the low-pass piece is an infrared reflection low-pass piece.
4. The utility model provides a fundus camera optical system, includes illumination mirror group optical system structure and imaging system structure, its characterized in that: the structure of the optical system of the illuminating mirror group is as claimed in any one of claims 1 to 3, the structure of the imaging system comprises a large objective lens, a zoom lens group and an imaging mirror group, and the image of the fundus comes out from the pupil, passes through the large objective lens to the zoom lens group and then passes through the imaging mirror group to the image acquisition device.
5. The fundus camera optical system according to claim 4, wherein: the image acquisition device is a CCD camera or an externally purchased lens component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202023087274.9U CN214965415U (en) | 2020-12-19 | 2020-12-19 | Optical system structure and optical system of fundus camera illuminating lens group |
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| CN202023087274.9U CN214965415U (en) | 2020-12-19 | 2020-12-19 | Optical system structure and optical system of fundus camera illuminating lens group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115113355A (en) * | 2022-06-30 | 2022-09-27 | 重庆贝奥新视野医疗设备有限公司 | Wide-angle fundus imaging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115113355A (en) * | 2022-06-30 | 2022-09-27 | 重庆贝奥新视野医疗设备有限公司 | Wide-angle fundus imaging system |
| CN115113355B (en) * | 2022-06-30 | 2024-04-09 | 重庆贝奥新视野医疗设备有限公司 | Wide-angle fundus imaging system |
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