CN114403800A

CN114403800A - Multi-functional ophthalmology check out test set

Info

Publication number: CN114403800A
Application number: CN202210149489.3A
Authority: CN
Inventors: 余文超; 陶钧
Original assignee: Chongqing Bio Newvision Medical Equipment Ltd
Current assignee: Chongqing Bio Newvision Medical Equipment Ltd
Priority date: 2022-02-18
Filing date: 2022-02-18
Publication date: 2022-04-29

Abstract

The invention discloses a multifunctional ophthalmology examination device, which comprises an OCT imaging system or/and an eyeground photographing system; the front-section lens group comprises two groups of lenses, and a distance is reserved between the two groups of lenses; when the front lens group is cut in, the light passing through the connecting lens passes through the front lens group and the ocular lens and then focuses on the ocular surface, and when the front lens group is not cut in, the light passing through the connecting lens passes through the ocular lens and then enters the ocular fundus. The invention organically integrates various ophthalmic detection systems on one device, realizes multiple purposes of one machine, can realize modularization, realizes the random addition and reduction of multiple functions, and ensures that users buy different modules according to the requirements of the users, thereby fully meeting the requirements of the ophthalmic market.

Description

Multi-functional ophthalmology check out test set

Technical Field

The invention relates to an ophthalmologic examination apparatus, in particular to a multifunctional ophthalmologic examination apparatus.

Background

In general, most of the ophthalmic examination apparatuses commonly available on the market measure a certain kind of parameters, such as:

optical Coherence Tomography (OCT) is an emerging non-contact, non-invasive ophthalmic imaging diagnostic technique that tomographically images tissues to clearly resolve tissue structures through differences in the reflective absorption of light by various tissues and its scattering power. A fundus camera (fundus camera) that illuminates the fundus of the eye through a specially designed illumination system, and the fundus of the eye obtains the image after processing on the photosensor through an imaging system. And an anterior segment observation and OCT imaging device.

However, at present, there is no device which organically integrates multiple functions into one machine, realizes the small and portable performance of the device, realizes multiple functions of one machine, and realizes each function modularization, so as to fully meet the requirement of the ophthalmologic market.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides multifunctional ophthalmologic examination equipment, which can integrate multiple functions into a small and portable device, realizes compatibility, can realize modular addition and subtraction and is convenient to assemble.

In order to achieve the purpose, the invention is realized by the following technical scheme: a multifunctional ophthalmic examination apparatus, characterized in that: comprises an OCT imaging system or/and a fundus photography system;

the front section lens group comprises two groups of lenses, the distance between the two groups of lenses is more than or equal to 4mm, and the focal lengths of the two groups of lenses are positive focal lengths;

the OCT imaging system includes a light source, a first coupler, a reference arm assembly, and a sample arm assembly,

light emitted by the light source is split by the first coupler and then enters the reference arm assembly and the sample arm assembly respectively;

the sample arm assembly comprises a first collimating lens, a first liquid lens, an XY galvanometer, a first low-pass reflector, a splicing lens and an ocular lens, and light of the sample arm reaches the first collimating lens, is collimated by the first collimating lens, then enters the XY galvanometer through the first liquid lens, and enters the splicing lens through the first low-pass reflector;

the front section lens group can be cut into a position close to the ocular lens, when the front section lens group is cut, light rays passing through the connecting lens pass through the front section lens group and the ocular lens and then focus on the ocular surface, when the front section lens group is not cut, light rays passing through the connecting lens pass through the ocular lens and then enter the ocular fundus, and light rays reflected by the ocular fundus or the ocular surface return to the first coupler along the sample arm component;

the fundus photographing system comprises an illumination LED lamp, a second collimating mirror, a polarizing lens, a polarizing reflector, an imaging relay lens, a second low-pass reflector, a second liquid lens, an analyzing lens and an image acquisition device, light emitted by the illumination LED lamp is collimated by the second collimating mirror and then passes through the polarizing lens to be changed into linearly polarized light, the linearly polarized light is reflected by the polarizing reflector to reach the imaging relay lens and then reaches the second low-pass reflector,

when the front lens group is cut in, the reflected light of the second low-pass reflector reaches the ocular lens through the front lens group and then enters the ocular surface, when the front lens group is not cut in, the reflected light of the second low-pass reflector enters the fundus through the ocular lens, the reflected light of the fundus or the ocular surface returns to the polarized reflector in the original path, passes through the polarized reflector and then enters the second liquid lens, and passes through the second liquid lens and then reaches the image acquisition device through the polarization detection lens.

In the scheme, the method comprises the following steps: still include the counterpoint system, the counterpoint system is provided with the counterpoint camera including the counterpoint LED lamp that is located eyepiece both sides, the outside of two counterpoint LED lamps of next-door neighbour. The alignment LED lamp irradiates the eye surface, and black and white eye kernels on the eye surface can be uniformly illuminated. The black and white eye is imaged on the contraposition camera. The two contraposition LED lamps are adjusted to accurately irradiate the centers of the pupils of the human eyes. In the process that the human eyes move relative to the machine, the two images are collected, and pupil images on the two cameras are overlapped through algorithm comparison (in the prior art), and at the moment, the alignment is correct. Otherwise, the machine is continuously moved relative to human eyes until the target is reached, namely pupil images on the two alignment cameras are overlapped. The alignment system is suitable for OCT and fundus photography.

In the scheme, the method comprises the following steps: when the fundus camera system is switched in, the second low-pass reflector is positioned between the relay lens and the ocular lens.

In the scheme, the method comprises the following steps: the optical signal of the LED liquid crystal panel enters the human eyes through the fixation lens group, the first low-pass reflector and the ocular lens.

In the scheme, the method comprises the following steps: the reference arm assembly comprises a polarization controller, light emitted by the light source enters the polarization controller and the sample arm assembly respectively after being split by the first coupler, the light coming out of the polarization controller enters the second coupler, light reflected by the eyeground or the ocular surface returns to the first coupler along the sample arm assembly and then is transmitted to the second coupler, and the output end of the second coupler is connected with the optical signal input end of the CPU.

In the scheme, the method comprises the following steps: the image acquisition device is a CCD.

In practical use, the fundus photographing system comprising the illumination LED lamp, the second collimating mirror, the polarizing mirror, the imaging continuing lens, the second low-pass mirror, the second liquid lens, the polarization detecting mirror and the image acquisition device can be designed into a fundus photographing system module, the light source, the first coupler, the second coupler, the CPU, the reference arm assembly and the sample arm assembly of the OCT imaging system are designed into a module, the front lens assembly is designed into a module, the LED liquid crystal panel and the fixing mirror assembly of the fixing system are designed into a module, and a user can select the cut-in of the module according to requirements.

Optical principle of OCT: light emitted by the light source is split by the first coupler, one part of the light is used as a reference arm light source and enters the second even coupler through the polarization controller, and the other part of the light is used as a sample collection light source and is used as a sampling light source. The sampling light source is collimated by the collimation effect of the first collimating mirror. Then, the collimated light rays pass through the first liquid lens, are incident on the XY galvanometer and are transmitted forwards in a divergent cone form through high-speed periodic deflection of two reflecting surfaces of the XY galvanometer. The light is reflected by the first low-pass reflector to reach the continuous lens. At the moment, the front-section lens group can be cut in or cut out selectively, if the front-section lens group is cut in, light passes through the front-section lens group, then is transmitted to the ocular lens and then is emitted into human eyes, the light can be focused on the ocular surface, at the moment, the tissue information of the ocular surface is collected, and if the front-section lens group is not cut in, the tissue information of the ocular fundus is collected. And back to the first coupler and then to the second coupler according to the above conduction path (sample arm assembly). And the two parts of optical signals reaching the second coupler generate interference, and the interference is transmitted to the CPU to be subjected to Fourier transform processing to obtain interference signals.

Fundus photographing function

The lighting LED lamp emits light, and the light rays are changed into linearly polarized light after passing through the second collimating lens and the polarizing lens. The linearly polarized light is reflected by the polarized reflector, then enters the imaging follow-up lens and is reflected by the second low-pass reflecting mirror.

At the moment, when the front segment lens group is cut in, light reaches the ocular lens through the front segment lens group to acquire an image of an anterior segment of the eye, and if the front segment lens group is cut out, an image of the fundus is acquired. The information of the fundus or the ocular surface is transmitted to the polarizing mirror according to the reflection, passes through the polarizing mirror, reaches the image acquisition device through the second liquid lens and the polarization analyzing lens, and then the image acquisition of the fundus or the ocular surface can be finished.

Eyesight strengthening

The light information on the LED liquid crystal panel passes through the lens group, is transmitted to the ocular lens by the connecting lens through the first low-pass reflector, and then enters eyes. The eyes can sense the symbol on the LED liquid crystal plate, namely the optical symbol is finally irradiated to the center of the eyeground, so that the fixation is realized.

Under the OCT function, aiming at human eyes with different visual degrees, the best position of the eyeground is obtained through the whole-course depth scanning by the first liquid lens. At this time, the first liquid lens has a voltage corresponding to a specific diopter value. This voltage signal is applied to the second liquid lens and the OCT focus information is utilized. In this way, it is achieved that the information of OCT focus is utilized by the fundus camera function. Thereby organically combining them.

Has the advantages that: the invention organically integrates various ophthalmic detection systems on one device, realizes one machine with multiple functions, can be modularized, realizes the random addition and reduction of multiple functions, and can be used for purchasing different modules according to the requirements of users.

Drawings

Fig. 1 is an integrated schematic diagram of an OCT imaging system and a fundus photography system.

FIG. 2 is a schematic diagram of a pure OCT imaging system.

Fig. 3 is a schematic view of a simple fundus camera system.

Detailed Description

The invention will be further described with reference to the following examples and the accompanying drawings.

Example 1

As shown in fig. 1 to 3, the multifunctional ophthalmologic inspection apparatus of the embodiment of the present invention includes an OCT imaging system or/and a fundus photography system. The front-section lens group 12 comprises two groups of lenses, and each group of lenses in the two groups of lenses can be a lens or a lens group consisting of two or more lenses. The distance between the two groups of lenses is more than or equal to 4mm, the distance satisfies that the conjugate surfaces of the fundus and the ocular surface are between the two groups of lenses, the focal lengths of the two groups of lenses are both positive focal lengths, and the conjugate image surface in the optical system is between the two groups of lenses but not near the surfaces of the lenses.

In actual manufacturing, the OCT imaging system, the fundus photographing system, and the anterior segment lens group 12 may be made into modules and inserted into the apparatus. In the selection, an OCT imaging system combined with the anterior segment mirror group 12, an eyeground photographing system combined with the anterior segment mirror group 12, and an OCT imaging system, an eyeground photographing system, and the anterior segment mirror group 12 may be selected. That is, the present invention can be finally selected in the combination of the OCT imaging system and the anterior segment lens group 12, in which case the fundus photographing system is not designed.

The combination of the fundus photography system and the front segment optics 12 can also be chosen, in which case the parts of the OCT imaging system are not required, i.e. the first collimating lens 6, the first liquid lens 7, the XY galvanometer 8 in the light source, the first coupler, the second coupler, the reference arm assembly, the CPU and the sample arm assembly of the OCT imaging system.

The OCT imaging system includes a light source 1, a first coupler 2, a reference arm assembly, and a sample arm assembly.

Light emitted by the light source 1 is split by the first coupler 2 and then enters the reference arm assembly and the sample arm assembly respectively.

The reference arm assembly comprises a polarization controller 3, the first coupler 2 is connected with the polarization controller 3 through optical fibers, light emitted by the light source 1 enters the polarization controller 3 after being split by the first coupler 2, the polarization controller 3 is connected with the second coupler 4 through the optical fibers, and the light coming out of the polarization controller 3 enters the second coupler 4.

The sample arm component comprises a first collimating mirror 6, a first liquid lens 7, an XY galvanometer 8, a first low-pass reflector 9, a splicing lens 10 and an ocular lens 11, and light of the sample arm reaches the first collimating mirror 6, is collimated by the first collimating mirror 6, passes through the first liquid lens 7, enters the XY galvanometer 8, sequentially passes through the first low-pass reflector 9 and enters the splicing lens 10.

The anterior segment optical assembly 12 can be selectively switched into or out of the OCT imaging system to obtain tissue information of the ocular surface or fundus. During actual manufacturing, the front lens group can be made into a module, the position for inserting the module is reserved on the shell, manual insertion can be achieved, and automatic insertion can also be achieved through driving of a motor and the like.

The front lens group 12 can be cut into a position close to the ocular lens 11, when the front lens group 12 is cut, light passing through the splicing lens 10 passes through the front lens group 12 and the ocular lens 11 and then focuses on the ocular surface, when the front lens group 12 is not cut, light passing through the splicing lens 10 passes through the ocular lens 11 and then enters the fundus, light reflected by the fundus or the ocular surface returns to the first coupler 2 along the sample arm component and then is transmitted to the second coupler 4, and the output end of the second coupler 4 is connected with the optical signal input end of the CPU5 through an optical fiber.

The fundus photographing system comprises an illumination LED lamp 13, a second collimating mirror 14, a polarizing lens 15, a polarizing reflector 16, an imaging follow-up lens 17, a second low-pass reflector 18, a second liquid lens 19, an analyzing lens 20 and an image acquisition device 21 (which can be a CCD), light emitted by the illumination LED lamp 13 is collimated by the second collimating mirror 14, then the light passes through the polarizing lens 15, then the light becomes linearly polarized light, and the linearly polarized light is reflected to the imaging follow-up lens through the polarizing reflector 16 and then reaches the second low-pass reflector 18.

If the equipment selects and integrates an OCT imaging system and an eyeground photographing system, an illumination LED lamp, a second collimating lens, a polarizing reflector, an imaging continuous lens, a second low-pass reflector, a second liquid lens, an analyzing lens and an image acquisition device of the eyeground photographing system can be designed into an eyeground photographing system module, a cut-in channel is reserved on a machine shell, and the machine shell can be cut in manually or automatically. When the fundus photographing system is switched in, the second low-pass mirror 18 is positioned between the relay lens 10 and the ocular lens 11.

Similarly, anterior segment set 12 can optionally be switched in or out of the OCT imaging system to obtain tissue information of the ocular surface or fundus.

When the front lens group 12 is cut in, the light reflected by the second low-pass reflector 18 reaches the ocular lens 11 through the front lens group 12 and then enters the ocular surface, when the front lens group 12 is not cut in, the light reflected by the second low-pass reflector 18 enters the eye ground through the ocular lens 11, the reflected light of the eye ground or the ocular surface returns to the polarization reflector 16 in a primary path, passes through the polarization reflector 16 and then enters the second liquid lens 19, and passes through the second liquid lens 19 and then reaches the image acquisition device 21 through the polarization detection lens 20.

The fixation system comprises an LED liquid crystal panel 22 and a fixation mirror group 23, and an optical signal of the LED liquid crystal panel 22 is incident to human eyes through the fixation mirror group 23, the first low-pass reflector 9 and the ocular lens 11. The eye perceives the symbol on the LED liquid crystal panel 22, i.e., the optical symbol is finally irradiated to the center of the fundus, and fixation is achieved.

The alignment system comprises alignment LED lamps 24 positioned on two sides of the ocular lens 11, and alignment cameras 25 are arranged on the outer sides of the two adjacent alignment LED lamps 21. The alignment LED lamp 24 irradiates the eye surface, and black and white eye kernels on the eye surface are uniformly illuminated. The black and white eye is imaged on the alignment camera 25. The two contraposition LED lamps 24 are adjusted to accurately irradiate the centers of the pupils of the human eyes. In the process that the human eyes move relative to the machine, the two images are collected and compared through an algorithm, so that pupil images on the two contraposition cameras 25 are superposed, and at the moment, the contraposition is correct. Otherwise, the machine is continuously moved relative to human eyes until the target is reached, namely pupil images on the two alignment cameras are overlapped. The alignment system is suitable for an OCT imaging system and an eyeground photographing system.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents, when used in practice.

Claims

1. A multifunctional ophthalmic examination apparatus, characterized in that: comprises an OCT imaging system or/and a fundus photography system;

2. The multifunctional ophthalmic-inspection apparatus of claim 1, characterized in that: still include the counterpoint system, the counterpoint system is provided with the counterpoint camera including the counterpoint LED lamp that is located eyepiece both sides, the outside of two counterpoint LED lamps of next-door neighbour.

3. The multifunctional ophthalmic-inspection apparatus of claim 1, characterized in that: when the fundus camera system is switched in, the second low-pass reflector is positioned between the relay lens and the ocular lens.

4. The multifunctional ophthalmic-examination apparatus of claim 1 or 2, characterized in that: the optical signal of the LED liquid crystal panel enters the human eyes through the fixation lens group, the first low-pass reflector and the ocular lens.

5. The multifunctional ophthalmic-inspection apparatus of claim 1, characterized in that: the reference arm assembly comprises a polarization controller, light emitted by the light source enters the polarization controller and the sample arm assembly respectively after being split by the first coupler, the light coming out of the polarization controller enters the second coupler, light reflected by the eyeground or the ocular surface returns to the first coupler along the sample arm assembly and then is transmitted to the second coupler, and the output end of the second coupler is connected with the optical signal input end of the CPU.

6. The multifunctional ophthalmic-inspection apparatus of claim 5, characterized in that: the image acquisition device is a CCD.