CN117234016A - Off-axis illumination imaging component and fundus camera - Google Patents
Off-axis illumination imaging component and fundus camera Download PDFInfo
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- CN117234016A CN117234016A CN202311272099.6A CN202311272099A CN117234016A CN 117234016 A CN117234016 A CN 117234016A CN 202311272099 A CN202311272099 A CN 202311272099A CN 117234016 A CN117234016 A CN 117234016A
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Abstract
The invention discloses an off-axis illumination imaging assembly and a fundus camera, and relates to the technical field of fundus cameras. The switchable light source illumination light path component in the component is arranged on a first input light path of the light chopping diaphragm; the light path turning component is arranged on a first output light path of the light chopping diaphragm; the eye-receiving light path component is arranged on a first output light path of the light path turning component; the eye-receiving light path component is also arranged on a first input light path of the light path turning component; the imaging light path component is arranged on a second output light path of the light path turning component; the imaging light path component is also arranged on a second input light path of the light chopping diaphragm; the image sensor is arranged on the second output light path of the light chopping diaphragm. The invention can reduce stray light and dark spots on the image plane by arranging the light path turning component.
Description
Technical Field
The invention relates to the technical field of fundus cameras, in particular to an off-axis illumination imaging assembly and a fundus camera.
Background
The light path of the traditional fundus camera is mostly annular illumination and coaxial imaging light path, and stray light can be reduced by adopting a black spot plate generally, but the arrangement of the black spot plate can reduce the light source efficiency in actual imaging, and dark spots are inevitably formed on an image surface.
Disclosure of Invention
An object of the present invention is to provide an off-axis illumination imaging assembly for fundus cameras that reduces stray light while reducing dark spots on the image plane.
In order to achieve the above object, the present invention provides the following solutions:
an off-axis illumination imaging assembly, comprising:
the device comprises a switchable light source illumination light path component, a light chopping diaphragm, a light path turning component, a gaze receiving light path component, an imaging light path component and an image sensor;
the switchable light source illumination light path component is arranged on a first input light path of the light chopping diaphragm; the light path turning component is arranged on a first output light path of the light chopping diaphragm; the first input light path of the light chopping diaphragm and the first output light path of the light chopping diaphragm are collinear;
the eye-receiving light path component is arranged on a first output light path of the light path turning component;
the eye-receiving optical path component is also arranged on a first input optical path of the optical path turning component; the first output light path of the light path turning component and the first input light path of the light path turning component are collinear and opposite in direction;
the imaging light path component is arranged on a second output light path of the light path turning component; the imaging light path component is also arranged on a second input light path of the light chopping diaphragm; the image sensor is arranged on a second output light path of the light chopping diaphragm; the second input light path of the light chopping diaphragm and the second output light path of the light chopping diaphragm are collinear; the first input light path of the light chopping diaphragm is parallel to the second input light path of the light chopping diaphragm; the second output light path of the light path turning component and the second input light path of the light chopping diaphragm are parallel to the light chopping diaphragm; the included angle between the second output light path of the light path turning component and the second input light path of the light chopping diaphragm is an acute angle;
the switchable light source illumination light path component is used for switching illumination light; the illumination light is infrared illumination light or visible illumination light;
the light chopping diaphragm is used for shielding reflected stray light formed by the eye-receiving light path component;
the light path turning component is used for reflecting the illumination light passing through the light chopping diaphragm into the eye-receiving light path component, receiving and secondarily reflecting the reflected light of the eye-receiving light path component into the imaging light path component;
the eye-receiving light path component enables the illumination light reflected by the light path turning component to enter human eyes and inputs the reflected light of the retina image of the human eyes into the light path turning component;
the imaging light path component is used for retina imaging;
the image sensor is used for acquiring retina images.
Optionally, the off-axis illumination imaging assembly further comprises a first illumination objective group;
the first illumination objective group comprises an illumination objective or a plurality of coaxially arranged illumination objectives;
the first illumination objective lens group is arranged between the light chopping diaphragm and the light path turning component.
Optionally, the objective optical assembly includes a plurality of coaxially disposed objective lenses.
Optionally, the switchable light source illumination light path assembly includes:
the device comprises an infrared illumination light source, a visible illumination light source, an illumination light path switching device, a spectroscope, an illumination light collecting lens group and an illumination view field diaphragm;
the infrared illumination light source is arranged on a first input light path of the spectroscope;
the visible illumination light source is arranged on a second input light path of the spectroscope;
the illumination light collecting lens group is arranged on an output light path of the spectroscope; the illumination light collecting lens group is used for carrying out collimation treatment on illumination light;
the illumination view field diaphragm is arranged on an output light path of the illumination light collecting lens group; the illumination field diaphragm is used for limiting illumination light to enter an illumination range of human eyes;
the illumination light path switching device is connected with the spectroscope; the illumination light path switching device is used for adjusting the angle of the spectroscope and reflecting infrared illumination light emitted by the infrared illumination light source or visible illumination light emitted by the visible illumination light source into the illumination field diaphragm.
Optionally, the illumination light path switching device is a motor or a relay.
Optionally, the light chopping diaphragm is of a circular sheet structure;
the edge of the light chopping diaphragm is uniformly provided with light passing hole pairs;
two light-passing holes in the same light-passing hole are of arc-shaped structures; two light-passing hole light-chopping diaphragms in the same light-passing hole are symmetrically arranged in diameter.
Optionally, the optical path turning component includes:
the first illumination light path reflector, the second illumination objective lens group, the illumination aperture diaphragm, the imaging aperture diaphragm, the first imaging lens group, the first imaging light path reflector and the second imaging light path reflector;
the first illumination light path reflector is arranged on a first input light path of the light chopping diaphragm;
the second illumination light path reflector is arranged on an input light path of the first illumination light path reflector; the first input light path of the light chopping diaphragm is vertical to the input light path of the first illumination light path reflecting mirror;
the second illumination objective lens group is arranged on the output light path of the second illumination light path reflecting mirror; the output light path of the second illumination light path reflector is perpendicular to the input light path of the first illumination light path reflector;
the illumination aperture diaphragm is arranged on the output light path of the second illumination objective lens group;
the output light path of the illumination aperture diaphragm is used as a second output light path of the light path turning component;
the input light path of the imaging aperture diaphragm is used as a second input light path of the light chopping diaphragm;
the first imaging lens group is arranged on an output light path of the imaging aperture diaphragm;
the first imaging light path reflecting mirror is arranged on an output light path of the first imaging lens group;
the second imaging light path reflector is arranged on the output light path of the first imaging light path reflector; the output light path of the first imaging light path reflecting mirror is vertical to the output light path of the first imaging lens group;
the output light path of the second imaging light path reflector is the second output light path of the light path turning component.
Optionally, the first illumination light path reflector, the second illumination light path reflector, the first imaging light path reflector and the second imaging light path reflector are arranged with a first straight line as an axis;
the second illumination objective lens group and the first imaging lens group are arranged by taking a second straight line as an axis;
the first line and the second line are parallel.
Optionally, the imaging light path assembly includes an imaging objective or a plurality of coaxially disposed imaging objectives.
A fundus camera employing the off-axis illumination imaging assembly.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
it is an object of the present invention to provide an off-axis illumination imaging assembly, for use with fundus cameras,
the off-axis illumination imaging mode is adopted, the motor is used for switching the infrared illumination light path and the visible illumination light path, so that the illumination efficiency is improved, the light chopping diaphragm and the light receiving axis are arranged in parallel, the axial size of a light path system is reduced, and the problems of stray light and ghost images can be reduced; the light path turning component adopting the prism reflection can reduce the adjustment difficulty and improve the adjustment efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an off-axis illumination imaging assembly in accordance with embodiment 1 of the present invention;
FIG. 2 is a schematic view of a light chopper diaphragm in embodiment 1 of the present invention;
fig. 3 is a schematic diagram of the second illumination objective lens set and the illumination optical axis in a centrifugal configuration and the first imaging lens set and the imaging optical path optical axis in embodiment 1 of the present invention;
fig. 4 is a schematic diagram showing the centrifugal configuration of the connection line between the rotation center of the light-chopping diaphragm and the optical axis of the imaging and illumination light path in embodiment 1 of the present invention.
Reference numerals illustrate: 1-an infrared illumination source; 2-a visible illumination source; 3-spectroscope; 4-an illumination collection lens group; 5-illuminating a field stop; 6-a light chopping diaphragm; 7-a first illumination objective group; 8-a first illumination light path mirror; 9-a second illumination light path mirror; 10-a second illumination objective; 11-an illumination aperture stop; 12-an objective lens group; 13-human eye; 14-imaging aperture stop; 15-a first imaging lens group; 16-a first imaging light path mirror; 17-a second imaging light path mirror; 18-a second imaging lens group; 19-an image sensor; 20-the principal optical axis of the objective lens group; 21-illumination and imaging turning the optical axis of the optical path; 22-imaging optical path optical axis; 23-a chopper diaphragm rotation shaft; 24-illumination light path optical axis.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An object of the present invention is to provide an off-axis illumination imaging assembly for fundus cameras that reduces stray light while reducing dark spots on the image plane.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1-4, the present embodiment provides an off-axis illumination imaging assembly comprising:
a switchable light source illumination light path component, a light chopping diaphragm 6, a light path turning component, a gaze receiving light path component, an imaging light path component and an image sensor 19; the switchable light source illumination light path component is arranged on a first input light path of the light chopping diaphragm 6; the light path turning component is arranged on a first output light path of the light chopping diaphragm 6; the first input optical path of the chopping diaphragm 6 and the first output optical path of the chopping diaphragm 6 are collinear.
The eye-receiving light path component is arranged on a first output light path of the light path turning component; the eye-receiving light path component is also arranged on a first input light path of the light path turning component; the first output light path of the light path turning component and the first input light path of the light path turning component are collinear and opposite in direction; the imaging light path component is arranged on a second output light path of the light path turning component; the imaging light path component is also arranged on a second input light path of the light chopping diaphragm; the image sensor is arranged on a second output light path of the light chopping diaphragm; the second input light path of the light chopping diaphragm and the second output light path of the light chopping diaphragm are collinear; the first input light path of the light chopping diaphragm is parallel to the second input light path of the light chopping diaphragm; the second output light path of the light path turning component and the second input light path of the light chopping diaphragm are parallel to the light chopping diaphragm; the included angle between the second output light path of the light path turning component and the second input light path of the light chopping diaphragm is an acute angle; the image sensor 19 is arranged on the second output light path of the light chopping diaphragm 6; the second input optical path of the chopping diaphragm 6 and the second output optical path of the chopping diaphragm 6 are collinear; the first input optical path of the chopping diaphragm 6 and the second input optical path of the chopping diaphragm 6 are parallel. The switchable light source illumination light path component is used for switching illumination light; the illumination light is infrared illumination light or visible illumination light; the light chopping diaphragm 6 is used for shielding reflected stray light formed by the eye-receiving light path component; the light path turning component is used for reflecting the illumination light passing through the light chopping diaphragm 6 into the eye-receiving light path component, receiving and secondarily reflecting the reflected light of the eye-receiving light path component into the imaging light path component; the eye-receiving light path component enables the illumination light reflected by the light path turning component to enter the human eye 13 and inputs the reflected light of the retina image of the human eye 13 into the light path turning component; the objective lens group main optical axis 20 is perpendicular to the chopper diaphragm rotation axis 23. The imaging light path component is used for retina imaging; the image sensor 19 is used to acquire a retinal image. The off-axis illumination imaging assembly further comprises a first illumination objective 7; the first illumination objective group 7 comprises an illumination objective or a plurality of coaxially arranged illumination objectives; the first illumination objective group 7 is disposed between the light chopping diaphragm 6 and the optical path turning assembly. Specifically, the objective optical path assembly includes a plurality of coaxially disposed objective lenses.
Wherein the switchable light source illumination light path assembly comprises: an infrared illumination light source 1, a visible illumination light source 2, an illumination light path switching device 3, a spectroscope 3, an illumination light collecting lens group 4 and an illumination field diaphragm 5; the infrared illumination light source 1 is arranged on a first input light path of the spectroscope 3; the visible illumination source 2 is arranged on a second input light path of the spectroscope 3; the illumination light collecting lens group 4 is arranged on the output light path of the spectroscope 3; the illumination light collecting lens group 4 is used for carrying out collimation treatment on illumination light; the illumination view field diaphragm 5 is arranged on the output light path of the illumination light collecting lens group 4; the illumination field stop 5 is used for limiting the illumination range of the illumination light entering the human eye 13; the illumination light path switching device 3 is respectively connected with the spectroscope 3; the illumination light path switching device 3 is used for adjusting the angle of the spectroscope 3, and reflects the infrared illumination light emitted by the infrared illumination light source 1 or the visible illumination light emitted by the visible illumination light source 2 into the illumination field diaphragm 5. The illumination light path switching device 3 is a motor or a relay.
As shown in fig. 2, the light chopping diaphragm 6 is of a circular sheet structure; the edge of the light chopping diaphragm 6 is uniformly provided with light passing hole pairs; two light-passing holes in the same light-passing hole are of arc-shaped structures; two light-passing hole light-chopping diaphragms 6 in the same light-passing hole are symmetrically arranged in diameter. The light-chopping diaphragm 6 may be disposed above the eyepiece group or below the eyepiece group, and a rotating motor may be disposed at the center of the disk.
Wherein, light path turn subassembly includes: a first illumination light path mirror 8, a second illumination light path mirror 9, a second illumination objective group 10, an illumination aperture stop 11, an imaging aperture stop 14, a first imaging lens group 15, a first imaging light path mirror 16, and a second imaging light path mirror 17; the first illumination light path reflector is arranged on a first input light path of the light chopping diaphragm; the second illumination light path reflector is arranged on the input light path of the first illumination light path reflector; the first input light path of the light chopping diaphragm is vertical to the input light path of the first illumination light path reflecting mirror; the second illumination objective lens group is arranged on the output light path of the second illumination light path reflecting mirror; the output light path of the second illumination light path reflecting mirror is perpendicular to the input light path of the first illumination light path reflecting mirror; the illumination aperture diaphragm is arranged on the output light path of the second illumination objective lens group; the output light path of the illumination aperture diaphragm is used as a second output light path of the light path turning component; the input light path of the imaging aperture diaphragm is used as a second input light path of the light chopping diaphragm; the first imaging lens group is arranged on an output light path of the imaging aperture diaphragm; the first imaging light path reflector is arranged on an output light path of the first imaging lens group; the second imaging light path reflector is arranged on the output light path of the first imaging light path reflector; the output light path of the first imaging light path reflector is vertical to the output light path of the first imaging lens group; the output light path of the second imaging light path reflector is the second output light path of the light path turning component. The illumination aperture stop 11 is used for limiting the light flux of the illumination beam; the imaging aperture stop 14 serves to limit the imaging beam throughput. The reflecting mirror can be total internal reflection or inclined plane coating reflection. The center of the light chopping diaphragm 6 can be arranged on one side of a connecting line of the imaging light path optical axis 22 and the illumination light path optical axis 24, or on the other side, and the light passing holes of the light chopping diaphragm 6 can be arranged adjacently and symmetrically or can be arranged in half-plane symmetry.
As shown in fig. 3 and 4, the first illumination light path mirror 8, the second illumination light path mirror 9, the first imaging light path mirror 16, and the second imaging light path mirror 17 are disposed with the first straight line as an axis (i.e., the illumination and imaging turning light path optical axis 21); the second illumination objective lens group 10 and the first imaging lens group 15 are arranged with the second straight line as an axis; the first line and the second line are parallel. The imaging light path component is a second imaging lens group 18. The second illumination light path reflecting mirror 9 and the first imaging light path reflecting mirror 16 may be divided into two pieces or may be made into one piece. The imaging light path assembly includes an imaging objective or a plurality of coaxially disposed imaging objectives. The second illumination objective optical axis is collinear with or off-axis from the first imaging objective optical axis. The rotation center of the light-chopping diaphragm is not positioned on the projection of the optical axis of the illumination and imaging turning optical path on the light-chopping diaphragm.
The system adopts an off-axis illumination and imaging light path, and comprises an illumination light path and an imaging light path, wherein the illumination light path comprises an infrared illumination light source 1, a visible light illumination light source 2, an illumination light path switching device 3, an illumination light path reflector, an illumination light collecting lens group 4, an illumination view field diaphragm 5, a first illumination objective lens group 7, an illumination light path reflector, a second illumination objective lens group 10, an illumination light path reflector and an ocular lens group; specifically, the infrared illumination source 1 provides infrared observation illumination light for retinal imaging of human eyes 13; the visible illumination source 2 provides a visible illumination flash of the retina image of the human eye 13; the illumination light path switching device 3 drives the reflecting mirror 4 to rotate so as to switch infrared illumination and visible illumination; the spectroscope 3 reflects infrared illumination light and visible illumination light; the illumination collection lens group 4 collects and collimates the light energy from the infrared illumination light source 1 and the visible illumination light source 2; the illumination field stop 5 limits the illumination range of the light entering the human eye 13; the light chopping diaphragm 6 forms slit illumination and shields reflected stray light from the ocular lens group and the cornea of the eye; the first illumination objective performs constraint imaging on illumination light; the reflector realizes the deflection of the light path; the second illumination objective performs constraint imaging on illumination light; the reflector realizes the deflection of the light path; the eye objective lens group 12 multiplexes to realize the acquisition of the illumination light entering the human eye 13 and retina image; the imaging reflector turns the light path; the first imaging lens group 15 performs retinal imaging; the imaging light path reflector turns the light path; the second imaging lens group 18 performs retinal imaging; the image sensor 19 performs retinal image acquisition and recording. The off-axis illumination imaging assembly works as follows: the infrared and visible illumination light source 2 is time-division multiplexed through the illumination light path switching device 3, then is collected and illuminated by the illumination light collecting lens group 4 to illuminate the field diaphragm 5, the light emitted by the field diaphragm is split-scanned by the light chopping diaphragm 6, and enters the human eye 13 to illuminate the retina of the human eye 13 after passing through the first illumination objective lens group 7, the illumination light path reflecting mirror, the second illumination objective lens group 10, the illumination light path reflecting mirror and the eye objective lens group 12; the illuminated retinal image is passed through the objective lens assembly 12, the imaging optical path mirror, the first imaging lens assembly 15, the imaging optical path mirror, the second imaging lens assembly 18, and the aperture stop 6 and then imaged by the image sensor 19.
Example 2
The present embodiment provides a fundus camera employing an off-axis illumination imaging assembly as described in embodiment 1.
The embodiments differ in that like parts are seen with each other in each embodiment. Also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (10)
1. An off-axis illumination imaging assembly, comprising:
the device comprises a switchable light source illumination light path component, a light chopping diaphragm, a light path turning component, a gaze receiving light path component, an imaging light path component and an image sensor;
the switchable light source illumination light path component is arranged on a first input light path of the light chopping diaphragm; the light path turning component is arranged on a first output light path of the light chopping diaphragm; the first input light path of the light chopping diaphragm and the first output light path of the light chopping diaphragm are collinear;
the eye-receiving light path component is arranged on a first output light path of the light path turning component;
the eye-receiving optical path component is also arranged on a first input optical path of the optical path turning component; the first output light path of the light path turning component and the first input light path of the light path turning component are collinear and opposite in direction;
the imaging light path component is arranged on a second output light path of the light path turning component; the imaging light path component is also arranged on a second input light path of the light chopping diaphragm; the image sensor is arranged on a second output light path of the light chopping diaphragm; the second input light path of the light chopping diaphragm and the second output light path of the light chopping diaphragm are collinear; the first input light path of the light chopping diaphragm is parallel to the second input light path of the light chopping diaphragm; the second output light path of the light path turning component and the second input light path of the light chopping diaphragm are parallel to the light chopping diaphragm; the included angle between the second output light path of the light path turning component and the second input light path of the light chopping diaphragm is an acute angle;
the switchable light source illumination light path component is used for switching illumination light; the illumination light is infrared illumination light or visible illumination light;
the light chopping diaphragm is used for shielding reflected stray light formed by the eye-receiving light path component;
the light path turning component is used for reflecting the illumination light passing through the light chopping diaphragm into the eye-receiving light path component, receiving and secondarily reflecting the reflected light of the eye-receiving light path component into the imaging light path component;
the eye-receiving light path component enables the illumination light reflected by the light path turning component to enter human eyes and inputs the reflected light of the retina image of the human eyes into the light path turning component;
the imaging light path component is used for retina imaging;
the image sensor is used for acquiring retina images.
2. The off-axis illumination imaging assembly of claim 1, further comprising a first illumination objective lens group;
the first illumination objective group comprises an illumination objective or a plurality of coaxially arranged illumination objectives;
the first illumination objective lens group is arranged between the light chopping diaphragm and the light path turning component.
3. The off-axis illumination imaging assembly of claim 1, wherein the eye-receiving light path assembly comprises a plurality of coaxially disposed eye-receiving objective lenses.
4. The off-axis illumination imaging assembly of claim 1, wherein the switchable light source illumination light path assembly comprises:
the device comprises an infrared illumination light source, a visible illumination light source, an illumination light path switching device, a spectroscope, an illumination light collecting lens group and an illumination view field diaphragm;
the infrared illumination light source is arranged on a first input light path of the spectroscope;
the visible illumination light source is arranged on a second input light path of the spectroscope;
the illumination light collecting lens group is arranged on an output light path of the spectroscope; the illumination light collecting lens group is used for carrying out collimation treatment on illumination light;
the illumination view field diaphragm is arranged on an output light path of the illumination light collecting lens group; the illumination field diaphragm is used for limiting illumination light to enter an illumination range of human eyes;
the illumination light path switching device is connected with the spectroscope; the illumination light path switching device is used for adjusting the angle of the spectroscope and reflecting infrared illumination light emitted by the infrared illumination light source or visible illumination light emitted by the visible illumination light source into the illumination field diaphragm.
5. The off-axis illumination imaging assembly of claim 4, wherein the illumination light path switching device is a motor or relay.
6. The off-axis illumination imaging assembly of claim 1, wherein the chopping diaphragm is a circular sheet-like structure;
the edge of the light chopping diaphragm is uniformly provided with light passing hole pairs;
two light-passing holes in the same light-passing hole are of arc-shaped structures; two light-passing hole light-chopping diaphragms in the same light-passing hole are symmetrically arranged in diameter.
7. The off-axis illumination imaging assembly of claim 1, wherein the optical path turning assembly comprises:
the first illumination light path reflector, the second illumination objective lens group, the illumination aperture diaphragm, the imaging aperture diaphragm, the first imaging lens group, the first imaging light path reflector and the second imaging light path reflector;
the first illumination light path reflector is arranged on a first input light path of the light chopping diaphragm;
the second illumination light path reflector is arranged on an input light path of the first illumination light path reflector; the first input light path of the light chopping diaphragm is vertical to the input light path of the first illumination light path reflecting mirror;
the second illumination objective lens group is arranged on the output light path of the second illumination light path reflecting mirror; the output light path of the second illumination light path reflector is perpendicular to the input light path of the first illumination light path reflector;
the illumination aperture diaphragm is arranged on the output light path of the second illumination objective lens group;
the output light path of the illumination aperture diaphragm is used as a second output light path of the light path turning component;
the input light path of the imaging aperture diaphragm is used as a second input light path of the light chopping diaphragm;
the first imaging lens group is arranged on an output light path of the imaging aperture diaphragm;
the first imaging light path reflecting mirror is arranged on an output light path of the first imaging lens group;
the second imaging light path reflector is arranged on the output light path of the first imaging light path reflector; the output light path of the first imaging light path reflecting mirror is vertical to the output light path of the first imaging lens group;
the output light path of the second imaging light path reflector is the second output light path of the light path turning component.
8. The off-axis illumination imaging assembly of claim 7, wherein the first illumination light path mirror, the second illumination light path mirror, the first imaging light path mirror, and the second imaging light path mirror are disposed about a first line;
the second illumination objective lens group and the first imaging lens group are arranged by taking a second straight line as an axis;
the first line and the second line are parallel.
9. The off-axis illumination imaging assembly of claim 1, wherein the imaging light path assembly comprises an imaging objective or a plurality of coaxially disposed imaging objectives.
10. A fundus camera employing an off-axis illumination imaging assembly as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311272099.6A CN117234016A (en) | 2023-09-28 | 2023-09-28 | Off-axis illumination imaging component and fundus camera |
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| CN202311272099.6A CN117234016A (en) | 2023-09-28 | 2023-09-28 | Off-axis illumination imaging component and fundus camera |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117761950A (en) * | 2024-02-21 | 2024-03-26 | 深圳莫廷医疗科技股份有限公司 | Fundus camera |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117761950A (en) * | 2024-02-21 | 2024-03-26 | 深圳莫廷医疗科技股份有限公司 | Fundus camera |
| CN117761950B (en) * | 2024-02-21 | 2024-04-30 | 深圳莫廷医疗科技股份有限公司 | Fundus camera |
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