CN112244764A - Lighting device for fundus observation - Google Patents
Lighting device for fundus observation Download PDFInfo
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- CN112244764A CN112244764A CN202011181879.6A CN202011181879A CN112244764A CN 112244764 A CN112244764 A CN 112244764A CN 202011181879 A CN202011181879 A CN 202011181879A CN 112244764 A CN112244764 A CN 112244764A
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- 238000005286 illumination Methods 0.000 claims abstract description 151
- 210000001508 eye Anatomy 0.000 claims abstract description 45
- 230000002093 peripheral effect Effects 0.000 claims abstract description 44
- 210000004087 cornea Anatomy 0.000 claims abstract description 28
- 210000005252 bulbus oculi Anatomy 0.000 claims abstract description 22
- 238000003384 imaging method Methods 0.000 claims description 27
- 239000011521 glass Substances 0.000 claims description 12
- 239000013307 optical fiber Substances 0.000 claims description 9
- 210000004220 fundus oculi Anatomy 0.000 claims 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 230000003760 hair shine Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000007689 inspection Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 210000001525 retina Anatomy 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0008—Apparatus for testing the eyes; Instruments for examining the eyes provided with illuminating means
Abstract
The application provides an illumination device for fundus observation, which comprises a corneal contact lens and an illumination light source; the first side surface of the corneal contact lens is in an inner arc shape and is used for being attached to the cornea of an eye, and the second side surface of the corneal contact lens is opposite to the first side surface; the light of the illumination light source is emitted into the corneal contact lens from the peripheral side surface of the corneal contact lens; the illumination light is totally reflected on the second side surface, and after being reflected on the peripheral side surface, the illumination light passes through the first side surface of the corneal contact lens to enter the eyeball to illuminate the fundus, and the reflected light of the fundus sequentially passes through the first side surface and the second side surface of the corneal contact lens to be emitted. The utility model provides a lighting device that eye ground was observed through setting up light source in corneal contact lens week side, shines the light and illuminates the eye ground after the reflection, has avoided the illumination to penetrate into light and can leave the reflection bright spot when the surface of lens and air contact, has solved the eye ground formation of image and has had the problem of facula interference.
Description
Technical Field
The application belongs to the technical field of ophthalmic medical treatment, specifically relates to an illuminator of fundus observation.
Background
With the development of medicine, the retina of the eye is required to be observed, so that pathological changes and ophthalmic diseases can be found in time in an early stage, the eye is not luminous, direct observation cannot be carried out, an external light source is required to enter for irradiation, and reflected light of the eye fundus tissues is used for imaging observation.
The imaging field of view is strictly required for fundus observation, and when fundus imaging with a large field of view is performed on the fundus, the incidence angle of light reflected out of the pupil from the fundus edge field of view on the cornea exceeds the critical angle to form total reflection, so that the light cannot enter the imaging system.
In a conventional contact fundus imaging apparatus, an external illumination light source generally illuminates the fundus direction from outside the contact lens, and image formation observation is performed by using return light. However, when the illuminating light is incident, the illuminating light leaves a reflective bright spot when passing through the glass surface of the contact lens, namely the surface of the contact lens contacted with air, and the bright spot is generated when passing through one glass surface. Since most contact lenses have a multi-piece lens structure, a plurality of bright spots are generated. And because of the incident angle of the illumination light source, the bright spots can not be superposed, so that a plurality of bright spots can be left in the observation system, and the observation effect of an observer on the eyeground is greatly disturbed.
In order to solve the above problems, the shape, angle, and position of the illumination spot are adjusted and the observation field is narrowed, and the influence of the spot is reduced mainly by sacrificing the observation range. Even so, the ideal observation effect is difficult to achieve, and therefore, the working difficulty is improved, the labor intensity is increased, and the observation time is prolonged.
Disclosure of Invention
The invention provides an illuminating device for fundus observation, and aims to solve the problem that in a contact type fundus imaging device in the prior art, reflected bright spots are left when illuminating incident light passes through the surface of a lens in contact with air, so that fundus imaging has facula interference.
According to a first aspect of embodiments of the present application, there is provided an illumination device for fundus observation, comprising a corneal contact lens and an illumination light source;
the first side surface of the corneal contact lens is in an inner arc shape and is used for being attached to the cornea of an eye, and the second side surface of the corneal contact lens is opposite to the first side surface;
the light of the illumination light source is emitted into the corneal contact lens from the peripheral side surface of the corneal contact lens; the illumination light is totally reflected on the second side surface, and after being reflected on the peripheral side surface, the illumination light passes through the first side surface of the corneal contact lens to enter the eyeball to illuminate the fundus, and the reflected light of the fundus sequentially passes through the first side surface and the second side surface of the corneal contact lens to be emitted.
In some embodiments of the present application, the contact lens is circular, rectangular or polygonal in cross-section.
In some embodiments of the present application, the peripheral side surface of the contact lens is provided with at least one light inlet, and the illumination light source is arranged relative to the light inlet such that illumination light of the illumination light source enters the contact lens through the light inlet.
In some embodiments of the present application, the illumination light source is one or more, and accordingly, the illumination light from the illumination light source is incident into the corneal contact lens through one or more light inlets, and the light inlets are uniformly arranged on the peripheral side surface of the corneal contact lens.
In some embodiments of the present application, the illumination light source is an LED light source, a light guide post-introduced light source, or a fiber-introduced light source.
In some embodiments of the present application, the peripheral side of the contact lens is provided with a reflective film in a region other than the light entrance, the reflective film being configured to reflect illumination light.
In some embodiments of the present application, light from the illumination source is directed into the contact lens from a peripheral side surface of the contact lens through an optical fiber.
In some embodiments of the present application, a glass cover is provided on the outside of the peripheral side of the contact lens.
In some embodiments of the present application, the illumination device for fundus observation further comprises a fundus imaging device;
the fundus imaging device receives the reflected light of the fundus to form a fundus image.
In some embodiments of the present application, a fundus imaging device is disposed outside the second side of the contact lens, the cornea, the contact lens, and the fundus imaging device being sequentially aligned on the same axis.
The illumination device for fundus observation comprises a corneal contact lens and an illumination light source; the first side surface of the corneal contact lens is in an inner arc shape and is used for being attached to the cornea of an eye, and the second side surface of the corneal contact lens is opposite to the first side surface; the light of the illumination light source is emitted into the corneal contact lens from the peripheral side surface of the corneal contact lens; the illumination light is totally reflected on the second side surface, and after being reflected on the peripheral side surface, the illumination light passes through the first side surface of the corneal contact lens to enter the eyeball to illuminate the fundus, and the reflected light of the fundus sequentially passes through the first side surface and the second side surface of the corneal contact lens to be emitted. The utility model provides a lighting device that eye ground was observed through setting up light source in corneal contact lens week side, shines the light and illuminates the eye ground after the reflection, has avoided the illumination to penetrate into light and can leave the reflection bright spot when the surface of lens and air contact, has solved the eye ground formation of image and has had the problem of facula interference.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic view showing a structure of a lighting device for fundus observation in the related art;
a schematic structural diagram of an illumination device for fundus observation according to an embodiment of the present application is shown in fig. 2;
fig. 3 is a schematic view showing a structure of an illumination device for fundus observation according to another embodiment of the present application;
fig. 4 is a schematic view showing a structure of an illumination device for fundus observation according to another embodiment of the present application;
fig. 5 is a schematic structural view of an illumination device for fundus observation according to another embodiment of the present application.
Detailed Description
In the course of realizing the present application, the inventors found that in the conventional illumination device for fundus observation, an external illumination light source generally illuminates the fundus direction from the outside of the contact lens, and imaging observation is performed by using return light. As shown in fig. 1, illumination light passes through a contact lens from the observation system side, enters an eyeball, illuminates the fundus, and then returns to the fundus, which is emitted from the observation system side and received, to finally form a fundus image. However, in the process, when the illumination light is incident, the illumination light leaves a reflective bright spot when passing through the surface of the contact lens glass, namely the surface of the contact lens glass, which is in contact with air, and finally leaves a plurality of bright spots in an observation system, so that the observation effect of an observer on the fundus is greatly disturbed.
In order to solve the problem that a plurality of bright spots are generated when the prior art returns, the method of introducing the illuminating light from the side surface of the lens in contact with the cornea of the eye is adopted, the illuminating light is introduced into the eyeball by utilizing the total reflection effect, and then the whole fundus is illuminated by utilizing diffuse reflection. The glass surface directly irradiated by the illumination light is positioned on the reverse illumination back surface, and the illumination light does not pass through any surface of the glass surface which is in contact with air when being incident. Therefore, no light spot visible to the viewing system can be generated due to the effect of total reflection.
The utility model provides a lighting device that eye ground was observed through setting up light source in corneal contact lens week side, shines the light and illuminates the eye ground after the reflection, has avoided the illumination to penetrate into light and can leave reflection bright spot when the surface of lens and air contact, has solved the eye ground formation of image and has had the problem of facula interference.
The illumination device for fundus observation comprises a corneal contact lens and an illumination light source; the first side surface of the corneal contact lens is in an inner arc shape and is used for being attached to the cornea of an eye, and the second side surface of the corneal contact lens is opposite to the first side surface; the light of the illumination light source is emitted into the corneal contact lens from the peripheral side light inlet of the corneal contact lens; the illumination light is totally reflected on the second side surface, and after being reflected on the peripheral side surface, the illumination light passes through the first side surface of the corneal contact lens to enter the eyeball to illuminate the fundus, and the reflected light of the fundus sequentially passes through the first side surface and the second side surface of the corneal contact lens to be emitted.
Through the lighting device that this application was observed to eye ground, need not to reduce the visual angle in order to avoid the facula, improved the observation scope of eye ground greatly.
Through the illumination device for fundus observation, the parameters of the illumination light path do not need to be adjusted repeatedly, the inspection efficiency is improved, and the application range and the actual operation efficiency of the device are improved.
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example 1
A schematic structural diagram of an illumination device for fundus observation according to an embodiment of the present application is shown in fig. 2.
As shown in fig. 2, the illumination device for fundus observation of the present embodiment includes a contact lens 10 and an illumination light source 20;
in particular, the method comprises the following steps of,
the first side surface 11 of the corneal contact lens 10 is in an inner arc shape and is used for being attached to a cornea A of an eye, the second side surface 12 of the corneal contact lens 10 is arranged opposite to the first side surface 11, the second side surface 12 is a plane and is further a conical curved surface capable of enabling light rays to be totally reflected, and the outer side of the second side surface 12 of the corneal contact lens 10 is an exit direction of fundus reflection light.
Light from the illumination light source enters the contact lens 10 from the peripheral side surface of the contact lens 10.
Specifically, as shown in fig. 2, the peripheral side surface 13 of the contact lens 10 is provided with a light inlet 14, the light inlet 14 may be a light hole, and the illumination light source 20 is disposed opposite to the light hole, so that the illumination light of the light source is incident into the contact lens 10 through the light inlet 14.
In other embodiments, the light from the illumination source 20 may be directed into the contact lens 10 from the peripheral side 13 of the contact lens 10 through an optical fiber. Specifically, a glass cover may be provided on the outside of the peripheral side 13 of the contact lens 10, and the optical fiber may enter the contact lens 10 through the glass cover and the peripheral side 13 of the contact lens 10.
Further, after the illumination light enters the corneal contact lens 10, the illumination light is totally reflected on the second side surface 12 and reflected on the peripheral side surface 13, the illumination light passes through the first side surface 11 of the corneal contact lens 10 and the cornea a of the eye, finally the incident eyeball illuminates the fundus, and the reflected light of the fundus is finally emitted after passing through the first side surface 11 and the second side surface 12 of the corneal contact lens 10 in sequence.
The illumination light of the illumination light source 20 is incident on the corneal contact lens 10 at a divergent unfixed angle, and a part of the illumination light is directly incident on the eyeball through the first side surface 11 of the corneal contact lens 10 and the cornea A of the eye; a part of the light is reflected on the peripheral side 13 of the opposite part; since the left side of the second side surface is a mirror medium and the right side is air, the illumination light irradiated on the second side surface 12 is totally reflected, and finally, most of the light also passes through the first side surface 11 and the cornea a and then is incident on the eyeball.
According to the application, the illumination light source is arranged on the peripheral side surface of the corneal contact lens, and the final illumination light is emitted into the eyeball according to the light incident path and then illuminates the whole eyeground through eyeball diffuse reflection. Therefore, the problem that illumination incident light passes through the second side face of the contact between the lens and the air is avoided, reflection bright spots left when the illumination incident light passes through the contact surface between the lens and the air are further avoided, and the problem that eyeground imaging has facula interference is solved.
In the embodiment of the present application, as shown in fig. 2, the first side surface 11 of the contact lens 10 is a concave surface, and the radian of the concave surface is the same as the anterior radian of the eyeball, so that the first side surface 11 can better fit the cornea a of the eye; in addition, the second side surface 12 of the corneal contact lens 10 is a plane, so that when illumination light is incident, the illumination light can be totally reflected to a greater extent, and the utilization rate of the illumination light is increased.
In particular, the method comprises the following steps of,
the cross-section of the contact lens 10 of the embodiments of the present application may be circular, rectangular, or symmetrical polygonal.
In some embodiments of the present application, the cross-section of the contact lens 10 is provided as a circle.
In particular, the method comprises the following steps of,
the illumination light source 20 may be an LED light source, a light source introduced into a light guide column, or a light source introduced into an optical fiber.
In some embodiments of the present application, the illumination source 20 is one or more, and accordingly, illumination light from the illumination source is directed into the contact lens through one or more light inlets 14.
In particular, the method comprises the following steps of,
when a plurality of illumination sources 20 are provided, the light inlets 14 are symmetrically disposed on the peripheral side 13 of the contact lens 10.
When a plurality of illumination light sources 20 are provided, the light holes are uniformly provided on the peripheral side surface of the contact lens.
Fig. 3 is a schematic structural view of an illumination device for fundus observation according to an embodiment of the present application.
As shown in fig. 3, the illumination device for fundus observation of the present embodiment includes a contact lens 10 and two illumination light sources 20;
in particular, the method comprises the following steps of,
the first side surface 11 of the corneal contact lens 10 is in an inner arc shape and is used for being attached to a cornea A of an eye, the second side surface 12 of the corneal contact lens 10 is opposite to the first side surface 11 and is a plane, and the outer side of the second side surface 12 of the corneal contact lens 10 is a fundus reflection light outgoing direction.
The peripheral side 13 of the contact lens 10 is symmetrically provided with two light inlets 14, and the illumination light source 20 is arranged opposite to the light hole, so that the illumination light of the light source enters the contact lens 10 from two directions through the two symmetrical light inlets 14.
Finally, referring to fig. 2, after the illumination light is totally reflected at the second side surface 12 and reflected at the peripheral side surface 13, the illumination light passes through the first side surface 11 of the contact lens 10 and the cornea a of the eye, and finally the incident eyeball illuminates the fundus of the eye, and the reflected light from the fundus of the eye finally passes through the first side surface 11 and the second side surface 12 of the contact lens 10 in sequence and then is emitted.
Compared with the cornea contact type fundus imaging device shown in fig. 2, in fig. 3, the light incidence angle and the light brightness are enlarged, so that the fundus illumination area and the fundus illumination brightness are improved, and the fundus imaging quality can be better improved.
In some embodiments of the present application, the peripheral side surface 13 of the contact lens 10 is provided with a reflective film in a region outside the light inlet 14, and the reflective film is used for reflecting the illumination light, so that the utilization rate of the illumination light is further improved, and the fundus imaging quality is improved.
Fig. 4 is a schematic view showing a structure of an illumination device for fundus observation according to another embodiment of the present application.
As shown in fig. 4, in some embodiments of the present application, the illumination device for fundus observation further includes a fundus imaging device 30; specifically, the fundus imaging apparatus 30 is used to receive reflected light from the fundus to form fundus images.
The fundus imaging device 30 is arranged on the outer side of the second side surface 12 of the corneal contact lens 10, and the cornea A of the eye, the corneal contact lens 10 and the fundus imaging device 20 are sequentially arranged on the same axis.
Further, in the above-mentioned case,
as shown in fig. 4, the cornea contact lens 10, the combined convex lens sheet 15 and the fixing frame 16 form a cornea contact assembly, so as to further improve the penetration effect of the fundus reflection light and the receiving efficiency of the fundus imaging device on the fundus reflection light, improve the fundus imaging quality, and simultaneously, the formed cornea contact assembly is convenient to mount and carry.
The illumination device for fundus observation comprises a corneal contact lens and an illumination light source; the first side surface of the corneal contact lens is in an inner arc shape and is used for being attached to the cornea of an eye, the second side surface of the corneal contact lens is arranged opposite to the first side surface, the second side surface is a plane, and further is a conical curved surface capable of enabling light rays to be totally reflected; the light of the illumination light source is emitted into the corneal contact lens from the peripheral side surface of the corneal contact lens; the illumination light is totally reflected on the second side surface, and after being reflected on the peripheral side surface, the illumination light passes through the first side surface of the corneal contact lens to enter the eyeball to illuminate the fundus, and the reflected light of the fundus sequentially passes through the first side surface and the second side surface of the corneal contact lens to be emitted.
The utility model provides a lighting device that eye ground was observed through setting up light source in corneal contact lens week side, shines the light and illuminates the eye ground after the reflection, has avoided the illumination to penetrate into light and can leave the reflection bright spot when the surface of lens and air contact, has solved the eye ground formation of image and has had the problem of facula interference.
Further, in the above-mentioned case,
through the lighting device that this application was observed to eye ground, need not to reduce the visual angle in order to avoid the facula, improved the observation scope of eye ground greatly.
Through the illumination device for fundus observation, the parameters of the illumination light path do not need to be adjusted repeatedly, the inspection efficiency is improved, and the application range and the actual operation efficiency of the device are improved.
Example 2
For details not disclosed in the illumination device for fundus observation of the present embodiment, please refer to specific implementation contents of the illumination device for fundus observation in other embodiments.
Fig. 5 is a schematic structural view of an illumination device for fundus observation according to an embodiment of the present application.
As shown in fig. 5, the illumination device for fundus observation of the present embodiment includes a contact lens 10 and an illumination light source 20;
in particular, the method comprises the following steps of,
the first side surface 11 of the corneal contact lens 10 is in an inner arc shape and is used for being attached to a cornea A of an eye, the second side surface 12 of the corneal contact lens 10 is arranged opposite to the first side surface 11, the second side surface 12 is a plane and is further a conical curved surface capable of enabling light rays to be totally reflected, and the outer side of the second side surface 12 of the corneal contact lens 10 is an exit direction of fundus reflection light.
Light from the illumination light source enters the contact lens 10 from the peripheral side surface of the contact lens 10.
Specifically, as shown in fig. 5, light from the illumination source 20 may be directed into the contact lens 10 from the peripheral side 13 of the contact lens 10 through an optical fiber (not shown in fig. 5). Specifically, a glass cover may be provided on the outer side of the peripheral side 13 of the contact lens 10, and the optical fiber may enter the contact lens 10 through the glass cover 131 and the peripheral side 13 of the contact lens 10.
Further, after the illumination light enters the corneal contact lens 10, the illumination light is totally reflected on the second side surface 12 and reflected on the peripheral side surface 13, the illumination light passes through the first side surface 11 of the corneal contact lens 10 and the cornea a of the eye, finally the incident eyeball illuminates the fundus, and the reflected light of the fundus is finally emitted after passing through the first side surface 11 and the second side surface 12 of the corneal contact lens 10 in sequence.
The illumination light of the illumination light source 20 is incident on the corneal contact lens 10 at a divergent unfixed angle, and a part of the illumination light is directly incident on the eyeball through the first side surface 11 of the corneal contact lens 10 and the cornea A of the eye; a part of the light is reflected on the peripheral side 13 of the opposite part; since the left side of the second side surface is a mirror medium and the right side is air, the illumination light irradiated on the second side surface 12 is totally reflected, and finally, most of the light also passes through the first side surface 11 and the cornea a and then is incident on the eyeball.
According to the application, the illumination light source is arranged on the peripheral side surface of the corneal contact lens, and the final illumination light is emitted into the eyeball according to the light incident path and then illuminates the whole eyeground through eyeball diffuse reflection. Therefore, the problem that illumination incident light passes through the second side face of the contact between the lens and the air is avoided, reflection bright spots left when the illumination incident light passes through the contact surface between the lens and the air are further avoided, and the problem that eyeground imaging has facula interference is solved.
In the embodiment of the present application, as shown in fig. 2, the first side surface 11 of the contact lens 10 is a concave surface, and the radian of the concave surface is the same as the anterior radian of the eyeball, so that the first side surface 11 can better fit the cornea a of the eye; in addition, the second side surface 12 of the corneal contact lens 10 is a plane, so that when illumination light is incident, the illumination light can be totally reflected to a greater extent, and the utilization rate of the illumination light is increased.
In particular, the method comprises the following steps of,
the cross-section of the contact lens 10 of the embodiments of the present application may be circular, rectangular, or symmetrical polygonal.
In some embodiments of the present application, the cross-section of the contact lens 10 is provided as a circle.
In particular, the method comprises the following steps of,
the illumination light source 20 may be an LED light source, a light source introduced into a light guide column, or a light source introduced into an optical fiber.
The illumination device for fundus observation comprises a corneal contact lens and an illumination light source; the first side surface of the corneal contact lens is in an inner arc shape and is used for being attached to the cornea of an eye, the second side surface of the corneal contact lens is arranged opposite to the first side surface, the second side surface 12 is a plane, and further is a conical curved surface capable of enabling light rays to be totally reflected; the light of the illumination light source is emitted into the corneal contact lens from the peripheral side surface of the corneal contact lens; the illumination light is totally reflected on the second side surface, and after being reflected on the peripheral side surface, the illumination light passes through the first side surface of the corneal contact lens to enter the eyeball to illuminate the fundus, and the reflected light of the fundus sequentially passes through the first side surface and the second side surface of the corneal contact lens to be emitted.
The utility model provides a lighting device that eye ground was observed through setting up light source in corneal contact lens week side, shines the light and illuminates the eye ground after the reflection, has avoided the illumination to penetrate into light and can leave the reflection bright spot when the surface of lens and air contact, has solved the eye ground formation of image and has had the problem of facula interference.
Further, in the above-mentioned case,
through the lighting device that this application was observed to eye ground, need not to reduce the visual angle in order to avoid the facula, improved the observation scope of eye ground greatly.
Through the illumination device for fundus observation, the parameters of the illumination light path do not need to be adjusted repeatedly, the inspection efficiency is improved, and the application range and the actual operation efficiency of the device are improved. It should be understood that the dimensions of the various features shown in the drawings are not drawn to scale for ease of illustration.
The above description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In addition, technical solutions between the various embodiments of the present application may be combined with each other, but it must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should be considered to be absent and not within the protection scope of the present application.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. An illumination device for fundus observation, which is characterized by comprising a corneal contact lens and an illumination light source;
the first side surface of the corneal contact lens is in an inner arc shape and is used for being attached to the cornea of an eye, and the second side surface of the corneal contact lens is opposite to the first side surface;
the light of the illumination light source is emitted into the corneal contact lens from the peripheral side surface of the corneal contact lens; the illumination light is totally reflected on the second side surface, and after being reflected on the peripheral side surface, the illumination light penetrates through the first side surface and enters the eyeball to illuminate the fundus oculi, and the reflected light of the fundus oculi sequentially penetrates through the first side surface and the second side surface of the corneal contact lens and then is emitted.
2. An illumination device for fundus observation according to claim 1, characterized in that said corneal contact lens is circular, rectangular or polygonal in cross section.
3. An illumination device for fundus observation according to claim 1, wherein said corneal contact lens is provided with at least one light inlet on a peripheral side thereof, and said illumination light source is disposed opposite to said light inlet so that illumination light from said illumination light source is incident on said corneal contact lens through said light inlet.
4. An illumination device for fundus observation according to claim 3, wherein said illumination light source is one or more, and accordingly, illumination light from said illumination light source is incident on said corneal contact lens through one or more light inlets uniformly provided on the peripheral side surface of said corneal contact lens.
5. An illumination device for fundus observation according to claim 3, wherein a peripheral side surface of said corneal contact lens is provided with a reflection film in a region other than said light entrance, said reflection film being for reflecting said illumination light.
6. An illumination device for fundus observation according to claim 1, wherein light of said illumination light source is introduced into said contact lens from a peripheral side surface thereof through an optical fiber.
7. An illumination device for fundus observation according to claim 6, wherein a glass cover is provided outside the peripheral surface of said corneal contact lens.
8. An illumination device for fundus observation according to claim 1, wherein said illumination light source is an LED light source, a light source introduced into a light guide column, or a light source introduced into an optical fiber.
9. An illumination device for fundus observation according to claim 1, further comprising fundus imaging means;
the fundus imaging device receives reflected light of the fundus to form fundus images.
10. An illumination device for fundus observation according to claim 9, wherein said fundus imaging device is disposed outside the second side of said contact lens, said cornea, contact lens and fundus imaging device being arranged in sequence on the same axis.
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| CN202011181879.6A CN112244764A (en) | 2020-10-29 | 2020-10-29 | Lighting device for fundus observation |
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| CN202011181879.6A CN112244764A (en) | 2020-10-29 | 2020-10-29 | Lighting device for fundus observation |
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Application publication date: 20210122 |