CN118177710A - Refractive compensation and fundus examination device - Google Patents

Abstract

The invention relates to a refractive compensation and fundus examination device, comprising: a contact lens; a mesoporous mirror; the light source module is used for providing near infrared light and white light respectively and enabling the infrared light and the white light to be emitted from a specific area as signal light; the function switching module is used for performing function switching according to the fundus image acquisition and diopter detection requirements of the human eyes to be detected so as to realize that light passing is realized when fundus image acquisition is performed, and full-field diopter adjustable compensation is performed from an object side when diopter detection is performed; the image side adjusting module is arranged for carrying out full-view field diopter adjustable compensation on the human eyes to be tested from the image side; the optotype module is used for providing a gazing object for the detected human eyes; the image acquisition module is used for acquiring fundus images and defocusing distribution images of the detected human eyes; the diopter detection and fundus examination can be realized through the invention, and the diopter detection and fundus examination device has better accuracy.

Description

Refractive compensation and fundus examination device

Technical Field

The invention relates to the technical field of fundus photoelectric detection, in particular to a refraction compensation and fundus examination device.

Background

The fundus is the deepest, bottommost place of the eye, and mainly contains the retina, optic nerve, vitreous posterior segment, etc. Since the retina is mainly blood vessels, nerves and photoreceptor cells, lesions such as hemorrhage, edema and exudation are liable to occur, and it is indispensable to examine the fundus to prevent fundus lesions, and optical detection is representative of fundus examination methods.

Since the fundus is at the deepest position of the human eye, the fundus is easily affected by nystagmus, ametropia and other factors during examination, and when ametropia, such as presbyopia, myopia and the like, occurs, the diopter number is required to be obtained according to the defocusing distribution condition of the glasses so as to be used as the diagnosis basis of fundus lesions.

In the prior art, an automatic fundus camera can be adopted to perform fundus examination, when the automatic fundus camera solves the problem of positioning eyes, an inner main imaging camera is generally used for photographing an eye periphery image in advance, left and right alignment is performed, up and down alignment is then performed, front and back position judgment is based on a double-sided vision principle, namely, an imaging module is respectively arranged at the left side and the right side of a main light path, and front and back focusing is completed according to images of the left imaging module and the right imaging module. However, this type of camera is difficult to alleviate for problems with nystagmus that lead to fundus examination errors or difficulties.

In the aspect of diopter detection, diopter detection methods in the prior art mainly comprise a circular confocal method and a Hartmann wavefront method, however, the two detection methods can only be used for measuring diopter of a central macular area, the angle of vision is extremely small, single measurement time is extremely short, and out-of-axis visual field defocus detection of the fundus is difficult to realize.

In addition, the device or the method for fundus examination in the prior art cannot realize detection of diopter of human eyes and fundus image acquisition by the same equipment, so that the detection procedure is complicated, the test cost is too high, and the modern medical treatment concept of economy and environmental protection is difficult to be met.

Disclosure of Invention

Based on the technical defects of the prior art listed in the background art, the invention provides a refraction compensation and fundus examination device.

The invention provides a refractive compensation and fundus examination device, which has the following technical scheme:

a refractive compensation and fundus examination device comprising an ocular lens and a mesoporous mirror, further comprising:

The light source module is used for providing near infrared light and white light respectively and enabling the infrared light and the white light to be emitted from a specific area as signal light;

The function switching module is used for performing function switching according to the fundus image acquisition and diopter detection requirements of the human eyes to be detected so as to realize that light passing is realized when fundus image acquisition is performed, and full-field diopter adjustable compensation is performed from an object side when diopter detection is performed;

the image side adjusting module is arranged for carrying out full-view field diopter adjustable compensation on the detected human eyes from an image side;

the optotype module is used for providing a gazing object for the detected human eyes;

the image acquisition module is used for acquiring fundus images and defocusing distribution images of the detected human eyes;

Wherein,

The mesoporous reflector is arranged to reflect the light output from the function switching module to the eye lens and transmit the light output by the eye lens to form transmitted light for transmission;

the light source module, the function switching module, the mesoporous reflector and the eye lens are sequentially arranged along the signal light propagation direction, and the mesoporous reflector, the image space adjusting module and the image acquisition module are sequentially arranged along the transmission light propagation direction.

The refraction compensation and fundus examination device provided by the invention respectively provides near infrared light and white light illumination through the light source module, the refraction compensation or direct light passing of the full view field is carried out through the function switching module, the refraction compensation and fundus examination device sequentially passes through the mesoporous reflector and the ocular lens, the ocular lens enters the eye to be examined, under the reflection action of the detected human eyes, reflected light retroreflects to pass through the eye lens and the mesoporous reflector in sequence, and is transmitted through the middle light transmission hole of the mesoporous reflector to form transmitted light, the transmitted light enters the image side adjusting module, the image side adjusting module performs refraction amount compensation, and the reflected light is transmitted to the image acquisition module to acquire a detection image. Meanwhile, the device also comprises a sighting mark module which can provide a gazing object for the tested human eyes, thereby avoiding the eyeground detection difficulty caused by nystagmus.

The refraction compensation and fundus examination device provided by the invention adopts the function switching module and the image Fang Diaojiao module, the function switching module can give light when fundus image acquisition is carried out, and the full-view field refraction quantity is carried out from the object side when diopter detection is carried out, so that when full-view field refraction detection on the eye to be examined is required, the full-view field defocus quantity compensation can be carried out from the object side and the image side respectively, and for the situation of the diopter error of the eye to be examined, the full-view field defocus information of the eye to be examined can be obtained according to the defocus information image and the compensation information obtained by the image acquisition module during the full-view field refraction detection, and a more accurate evaluation result can be obtained for fundus examination.

The refraction compensation and fundus examination device provided by the invention not only can realize out-of-axis visual field defocus detection of fundus, but also can collect fundus images, so that at least two important detection results can be obtained through the same equipment, and the refraction compensation and fundus examination device provides basis for diagnosis of fundus lesions and has wide practical significance and higher economic benefit.

Preferably, the light source module includes a white light source, an even number of near infrared light sources, a beam splitter, and a first collimating lens, where the beam splitter is configured to transmit light emitted from the white light source into the first collimating lens, reflect light emitted from the even number of near infrared light sources into the first collimating lens, so that the first collimating lens forms signal light that passes from a specific area, and the white light source, the beam splitter, and the first collimating lens are arranged with optical axes overlapping, and the even number of near infrared light sources are symmetrically distributed with respect to a straight line perpendicular to the optical axis of the first collimating lens; and further, white light illumination and infrared light illumination are respectively provided from different directions, and the requirements of different image acquisition can be met.

Preferably, even numbers of the near infrared light sources are light sources with wavelengths of 750-950nm and light source divergence angles of more than 30 degrees; and further, the imaging frequency domain can be controlled, and the image processing can be facilitated.

Preferably, an annular diaphragm is arranged between the white light source and the beam splitter along the light propagation path emitted by the white light source; and further can meet the transmission requirement of white light.

Preferably, a second collimating lens is disposed between the function switching module and the mesoporous reflector along the propagation direction of the signal light, so as to ensure that the light output of the function switching module is collimated and conveyed to the mesoporous reflector, and ensure smooth light path.

Preferably, the function switching module includes:

A switching unit configured to switch between the compensation of the amount of refraction and the light passing on the signal light propagation path;

the first electric control translation stage is used for driving the switching unit to move along the signal light propagation path;

The control unit is arranged to control the displacement of the first electric control translation stage and the function switching of the switching unit according to the fundus image acquisition and diopter detection requirements of the human eyes to be detected;

Wherein,

The switching unit is arranged on the first electric control translation stage, and the control unit is respectively and electrically connected with the switching unit and the first electric control translation stage;

furthermore, the control unit is adopted to control the first electric control translation stage and the switching unit respectively, so that the function of the function switching module is realized in one implementation mode, and the orderly and high-efficiency operation of the function switching module is ensured.

Preferably, the switching unit comprises a motor and a rotary table arranged on an output shaft of the motor, wherein the rotary table is provided with a micro-pore plate and a light-transmitting port in surrounding type, the micro-pore plate is provided with a plurality of micro-pores which are uniformly distributed, the motor is used for driving the rotary table to rotate, so that the light-transmitting port is adjusted to the signal light propagation path when fundus images are acquired, and the micro-pore plate is adjusted to the signal light propagation path when diopter detection is performed.

Preferably, the image side adjusting module comprises a second electric control translation stage and a compensating mirror arranged on the second electric control translation stage, and the second electric control translation stage is used for driving the compensating mirror to move along the transmission light propagation path.

The image acquisition module comprises an imaging lens and a fundus camera which are sequentially arranged along the transmission light propagation direction; further, when the diopter compensation is required, the defocus information image can be acquired by the fundus camera, and when the fundus image acquisition is required, the corresponding picture can be acquired by the fundus camera.

Preferably, the sighting target module comprises a sighting target and a reflecting mirror, wherein the reflecting mirror is used for reflecting the luminous beam emitted by the sighting target into the compensating mirror so as to be reflected into the tested human eye along the transmission light propagation opposite direction through the compensating mirror; thereby ensuring that a fixation target is provided when the detected human eyes detect, and the fundus is inspected smoothly.

Drawings

FIG. 1 is a schematic view of a refractive compensation and fundus examination device according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a function switching module according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a microplate structure according to an embodiment of the present invention.

Wherein, the numbers marked in the figures represent respectively: 1. eye lens: 2. mesoporous mirror: 3. a light source module: 31. a white light source; 32. a near infrared light source; 33. a beam splitter; 34. a first collimating lens; 35. an annular diaphragm; 4. and a function switching module: 41. a switching unit; 411. a motor; 412. a turntable; 4121. a microplate; 4122. a light-transmitting port; 42. the first electric control translation stage; 43. a control unit; 5. the human eye to be tested: 6. an image side adjusting module; 61. the second electric control translation stage; 62. a compensation mirror; 7. a sighting mark module; 71. a visual target; 72. a reflecting mirror; 8. an image acquisition module; 81. an imaging lens; 82. a fundus camera; 9. and a second collimating lens.

Detailed Description

The technical solution of the present invention will be clearly and completely described below by using an embodiment in combination with the drawings in the embodiment of the present invention.

The embodiment of the invention provides a refraction compensation and fundus examination device, which comprises an ocular lens 1 and a mesoporous reflector 2, and further comprises:

A light source module 3 for providing near infrared light and white light, respectively, and causing the infrared light and the white light to be emitted from a specific area as signal light;

A function switching module 4 configured to perform function switching according to the fundus image acquisition and diopter detection requirements of the human eye 5 to be tested, so as to realize that light is given when fundus image acquisition is performed, and full-field diopter adjustable compensation is performed from the object side when diopter detection is performed;

an image side adjusting module 6, configured to perform full-field diopter adjustable compensation for the tested human eye 5 from the image side;

The optotype module 7 is used for providing a gazing object for the detected human eyes 5;

The image acquisition module 8 is used for acquiring fundus images and defocusing distribution images of the detected human eye 5;

Wherein,

The mesoporous mirror 2 is configured to reflect the light output from the function switching module 4 to the objective lens 1, and transmit the light output from the objective lens 1 to form transmitted light for propagation;

the light source module 3, the function switching module 4, the mesoporous reflector 2 and the eye lens 1 are sequentially arranged along the signal light propagation direction, and the mesoporous reflector 2, the image space adjusting module 6 and the image acquisition module 8 are sequentially arranged along the transmission light propagation direction.

In this embodiment, the light source module 3 includes a white light source 31, an even number of near infrared light sources 32, a beam splitter 33 and a first collimating lens 34, the beam splitter 33 is configured to transmit light emitted from the white light source 31 into the first collimating lens 34, reflect light emitted from the even number of near infrared light sources 32 into the first collimating lens 34, so that the first collimating lens 34 forms signal light emitted from a specific area, the white light source 31, the beam splitter 33 and the first collimating lens 34 are disposed with their optical axes overlapped, and the even number of near infrared light sources 32 are disposed symmetrically with respect to a line perpendicular to the optical axis of the first collimating lens 34.

In addition, the even number of near infrared light sources 32 are light sources with wavelengths of 750-950nm and light source divergence angles of more than 30 degrees, in this embodiment, the number is 2, and the positions are up and down by using LED light sources, as shown in fig. 1. For visual description we will refer to the above located near infrared light source as the upper light source and the below located near infrared light source as the lower light source. Also, along the light propagation path emitted from the white light source 31, an annular diaphragm 35 is provided between the white light source 31 and the beam splitter 33.

In the present embodiment, a second collimating lens 9 is disposed between the function switching module 4 and the mesoporous mirror 2 along the propagation direction of the signal light.

As one embodiment, the function switching module 4 of the present embodiment includes:

A switching unit 41 configured to switch between the compensation of the amount of refraction and the light passing on the signal light propagation path;

A first electrically controlled translation stage 42 for driving the switching unit 41 to move along the signal light propagation path;

a control unit 43 configured to control the displacement amount of the first electronically controlled translation stage 42 and the function switching of the switching unit 41, respectively, according to fundus image acquisition and diopter detection requirements for the human eye 5 under test;

Wherein,

The switching unit 41 is disposed on the first electrically controlled translation stage 42, and the control unit 43 is electrically connected to the switching unit 41 and the first electrically controlled translation stage 42, respectively.

Specifically, the switching unit 41 includes a motor 411 and a rotary table 412 disposed on an output shaft of the motor 411, wherein a micro-pore plate 4121 and a light-transmitting opening 4122 are disposed on the rotary table 412 in a surrounding manner, a plurality of micro-pores uniformly distributed are disposed on the micro-pore plate 4121, and the micro-pores can be distributed in a plurality of concentric circles, so that a light spot image corresponding to the micro-pores can be formed on the fundus under the action of the near infrared light source 32, and the light spot image can be collected by the salient collecting module 8. The motor 411 is used for driving the turntable 412 to rotate, so as to adjust the light-passing port 4122 to the signal light propagation path when fundus image acquisition is performed, and adjust the micro-plate 4121 to the signal light propagation path when diopter detection is performed.

So far, when the function switching is required, the control unit 43 may send a pulse signal to the motor 411 to drive the turntable 412 to rotate by a plurality of angles, so as to implement the function switching. Meanwhile, on the basis, lenses with different thicknesses, or convex lenses and concave lenses, can be mounted on the turntable 412 so as to realize more function switching.

In this embodiment, the image space adjusting module 6 includes a second electronically controlled translation stage 61 and a compensation mirror 62 disposed on the second electronically controlled translation stage 61, where the second electronically controlled translation stage 61 is configured to drive the compensation mirror 62 to move along the transmission light propagation path. The image pickup module 8 includes an imaging lens 81 and a fundus camera 82 which are sequentially disposed in the transmission light propagation direction.

In the refraction compensation and fundus inspection device provided in this embodiment, the whole eye refraction detection and fundus inspection function is combined, when the upper light source and the lower light source emit light, the control unit 43 is used to control the motor 411 to make the micro-pore plate 4121 be located on the signal light propagation path, refraction measurement and refraction compensation are performed, if the refraction of the measured eye 5 is normal, the micro-pore plate 4121 collected by the fundus camera 82 is overlapped under the effect of the upper light source and the lower light source respectively, if the refraction error occurs, the images formed by the upper light source and the lower light source respectively acting on the micro-pore plate 4121 deviate, at this time, the control unit 43 is required to control the first electrically controlled translation stage 42 to move along the signal light propagation path to perform refraction compensation from the object space, and at the same time, the second electrically controlled translation stage 61 is required to move the compensation mirror 62 to perform refraction compensation from the image space, after the refraction compensation, the refraction of the measured eye 5 is calculated according to the displacement amount of the two electrically controlled translation stages.

Subsequently, the manipulation control unit 43 manipulates the motor 411 to remove the micro-plate 4121, moves the light passing hole 4122 onto the signal light propagation path so as to be in a completely light passing state, and the illumination light illuminates the fundus without shielding, so that a fundus image can be acquired by the fundus camera 82. The infrared image and the white light color image can be acquired respectively as required.

In addition, as an embodiment, the optotype module 7 includes an optotype 71 and a reflecting mirror 72, and the reflecting mirror 72 is used for reflecting the light beam emitted by the optotype 71 into the compensating mirror 62 so as to be reflected into the eye 5 to be tested through the compensating mirror 62 along the transmission light propagation reverse direction, and the eye 5 to be tested condenses the eyes by looking at the optotype 71, so as to provide a guarantee for fundus examination. The shape of the optotype 71 may be dependent on the specific situation of the person.

Although embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (10)

1. The refraction compensation and fundus examination device comprises an eye lens (1) and a mesoporous reflector (2), and is characterized in that: further comprises:

A light source module (3) for providing near infrared light and white light, respectively, and causing the infrared light and the white light to be emitted from a specific area as signal light;

A function switching module (4) which is configured to perform function switching according to the fundus image acquisition and diopter detection requirements of the human eye (5) to be detected, so as to realize that light is transmitted when fundus image acquisition is performed, and full-field diopter adjustable compensation is performed from an object side when diopter detection is performed;

An image side adjusting module (6) which is used for carrying out full-field refraction quantity adjustable compensation on the tested human eye (5) from an image side;

a sighting mark module (7) for providing a gazing object for the tested human eye (5);

The image acquisition module (8) is used for acquiring fundus images and defocusing distribution images of the detected human eye (5);

Wherein,

The mesoporous reflector (2) is arranged to reflect the light output from the function switching module (4) to the ocular lens (1) and transmit the light output by the ocular lens (1) to form transmitted light for propagation;

The light source module (3) the function switching module (4) the mesoporous speculum (2) the eye lens (1) is followed signal light propagation direction sets gradually, mesoporous speculum (2) image side regulating module (6) image acquisition module (8) are followed the transmission light propagation direction sets gradually.

2. The refractive compensation and fundus examination apparatus according to claim 1, wherein: the light source module (3) comprises a white light source (31), an even number of near infrared light sources (32), a beam splitter (33) and a first collimating lens (34), wherein the beam splitter (33) is used for transmitting light emitted by the white light source (31) into the first collimating lens (34), and reflecting light emitted by the even number of near infrared light sources (32) into the first collimating lens (34), so that the first collimating lens (34) forms signal light emitted from a specific area, the white light source (31), the beam splitter (33) and the first collimating lens (34) are arranged in a mode that optical axes coincide, and the even number of near infrared light sources (32) are symmetrically distributed relative to a straight line perpendicular to the optical axis of the first collimating lens (34).

3. The refractive compensation and fundus examination apparatus according to claim 2, wherein: an even number of the near infrared light sources (32) are light sources with the wavelengths of 750-950nm and the divergence angles of the light sources of more than 30 degrees.

4. A refractive compensation and fundus examination apparatus according to claim 3, wherein: an annular diaphragm (35) is arranged between the white light source (31) and the beam splitter (33) along the light propagation path emitted by the white light source (31).

5. A refractive compensation and fundus examination apparatus according to any of claims 2-4, wherein: and a second collimating lens (9) is arranged between the function switching module (4) and the mesoporous reflecting mirror (2) along the propagation direction of the signal light.

6. The refractive compensation and fundus inspection apparatus according to claim 5, wherein: the function switching module (4) includes:

A switching unit (41) configured to switch between optical refraction compensation and light transmission on the signal light propagation path;

a first electrically controlled translation stage (42) for driving the switching unit (41) to move along the signal light propagation path;

A control unit (43) configured to control the displacement amount of the first electronically controlled translation stage (42) and the function switching of the switching unit (41) according to fundus image acquisition and diopter detection requirements for the human eye (5) under test, respectively;

Wherein,

The switching unit (41) is arranged on the first electric control translation table (42), and the control unit (43) is electrically connected with the switching unit (41) and the first electric control translation table (42) respectively.

7. The refractive compensation and fundus examination apparatus according to claim 6, wherein: the switching unit (41) comprises a motor (411) and a rotary table (412) arranged on an output shaft of the motor (411), wherein a micro-pore plate (4121) and a light-passing opening (4122) are distributed on the rotary table (412) in a surrounding mode, a plurality of micro-pores which are uniformly distributed are formed in the micro-pore plate (4121), the motor (411) is used for driving the rotary table (412) to rotate, so that the light-passing opening (4122) is adjusted to a signal light propagation path when fundus image acquisition is carried out, and the micro-pore plate (4121) is adjusted to the signal light propagation path when diopter detection is carried out.

8. The refractive compensation and fundus inspection apparatus according to claim 7, wherein: the image side adjusting module (6) comprises a second electric control translation stage (61) and a compensating mirror (62) arranged on the second electric control translation stage (61), and the second electric control translation stage (61) is used for driving the compensating mirror (62) to move along the transmission light propagation path.

9. The refractive compensation and fundus examination apparatus according to claim 8, wherein: the image acquisition module (8) comprises an imaging lens (81) and a fundus camera (82) which are sequentially arranged along the transmission light propagation direction.

10. Refractive compensation and fundus examination apparatus according to claim 8 or 9, characterized in that: the optotype module (7) comprises an optotype (71) and a reflecting mirror (72), wherein the reflecting mirror (72) is used for reflecting the luminous beam emitted by the optotype (71) into the compensating mirror (62) so as to be reflected into the tested human eye (5) along the transmission light propagation reflecting direction through the compensating mirror (62).