Imaging method and system

Abstract

The invention provides an imaging method and system, and relates to the technical field of light conduction, and the method comprises the steps: a first light source emits a first light beam to a first light guide assembly, and the first light beam is divided into a reference light beam and a sample light beam; the sample light beam is reflected by the first reflection assembly, passes through the second light guide assembly, the third light guide assembly and the fourth light guide assembly in sequence, reaches an eyeball to be measured and then returns to the first light guide assembly according to the original path to interfere with the reference light beam, and interference information is generated; obtaining an optical coherence tomography image based on the interference information; the second light source emits a second light beam to the fifth light guide assembly to the eyeball to be measured, and the second light beam is reflected to the reflecting surface of the second reflecting assembly through the reflecting surfaces of the fourth light guide assembly to the third light guide assembly and is reflected to the sixth light guide assembly; the second light beam passes through a sixth light guide assembly to the sensor; obtaining a fundus color image based on the second light beam; the problem that an optical coherence tomography image and a fundus color image cannot be generated at the same time through an imaging method of an existing imaging device is solved.

Description

Technical Field

[0001] The present application relates to the field of light transmission technology, and in particular to an imaging method and system. Background Art

[0002] Optical Coherence Tomography (OCT) is a non-invasive, non-destructive optical imaging technology that can obtain depth resolution information inside a sample and is currently widely used in ophthalmic diagnosis. Fundus cameras can record color images of the fundus to assist doctors in diagnosing fundus diseases.

[0003] The OCT optical path is designed for scanning imaging with an 80-degree field of view; the scanning part mainly includes components such as swept-frequency laser light source, MEMS galvanometer, and liquid lens. The imaging system fundus color imaging optical path is designed for large-field imaging with a 160-degree field of view, with small distortion and field curvature and high imaging resolution.

[0004] However, currently, optical coherence tomography equipment only has desktop devices for adults, and desktop devices cannot complete tomography imaging for uncooperative infants and young children; and the imaging methods of current imaging equipment cannot simultaneously generate optical coherence tomography images and fundus color images. Summary of the invention

[0005] The present application provides an imaging method and system to solve the technical problem that the imaging method of the current imaging device cannot generate an optical coherence tomography image and a fundus color image at the same time.

[0006] The first aspect of the present application provides an imaging method, comprising: A first light source emits a first light beam into a first light guide component, and the first light beam is divided into a reference light beam and a sample light beam by the first light guide component; the sample light beam is reflected by the first reflection component and sequentially passes through the second light guide component, the third light guide component, and the fourth light guide component to the eyeball to be tested, and then returns to the first light guide component along the original path; the sample light beam after returning along the original path interferes with the reference light beam to generate interference information; the first light guide component, the second light guide component, the third light guide component, and the fourth light guide component are used to guide the first light beam; the first reflection component is used to reflect the first light beam; the wavelength length of the first light beam is a first preset length; Based on the interference information, an optical coherence tomography image is obtained by an image transformation algorithm; The second light source emits a second light beam to the fifth light guide component to the eyeball to be tested, and then passes through the fourth light guide component to the third light guide component; the second light beam is reflected to the second reflection component through the reflection surface of the third light guide component; the second light beam is reflected to the sixth light guide component through the reflection surface of the second reflection component; the second light beam passes through the sixth light guide component to the sensor; the fifth light guide component, the fourth light guide component, and the sixth light guide component are used to guide the second light beam; the third light guide component and the second reflection component are used to reflect the second light beam; the wavelength length of the second light beam is a second preset length; Based on the second light beam, obtaining a fundus color image; The reflective surface of the third light guide component is provided with a first reflective film and a second reflective film; the first reflective film is used to guide the light beam in the first preset length band, and the second reflective film is used to reflect the light beam in the second preset length band.

[0007] In some embodiments, the fourth light guide component includes: A first lens, a second lens, a third lens, and a fourth lens arranged on the same optical axis; The third light guide component is a first prism; The first lens is provided with a first mirror surface and a second mirror surface; the first mirror surface close to the eyeball to be tested is a concave surface, and the second mirror surface away from the eyeball to be tested is a convex surface; The second lens is provided with a third mirror surface and a fourth mirror surface; the third mirror surface close to the eyeball to be tested is a concave surface, and the fourth mirror surface away from the eyeball to be tested is a convex surface; The third lens is provided with a fifth mirror surface and a sixth mirror surface; the fifth mirror surface close to the eyeball to be tested is a convex surface, and the sixth mirror surface away from the eyeball to be tested is a concave surface; The fourth lens is provided with a seventh mirror surface and an eighth mirror surface; the seventh mirror surface close to the eyeball to be tested is a concave surface, and the eighth mirror surface away from the eyeball to be tested is a convex surface; The first prism is provided with a ninth mirror surface and a tenth mirror surface; the ninth mirror surface close to the eyeball to be tested is a vertical surface, and the tenth mirror surface away from the eyeball to be tested is an inclined surface; the angle between the ninth mirror surface and the tenth mirror surface is 45°.

[0008] In some embodiments, the first mirror has a curvature radius of -7.8 mm, a mirror distance of 3.8 mm, and an effective aperture of 1.085 mm; the second mirror has a curvature radius of -7.856 mm, a mirror distance of 3.214 mm, and an effective aperture of 3.251 mm; the third mirror has a curvature radius of -230.877 mm, a mirror distance of 5.5 mm, and an effective aperture of 6.793 mm; the fourth mirror has a curvature radius of -11.761 mm, a mirror distance of 6.483 mm, and an effective aperture of 7.835 mm; the fifth mirror has a curvature radius of 21.822 mm, a mirror distance of 5.8 mm, and the effective aperture is 10.131mm; the curvature radius of the sixth mirror is 15.579mm, the mirror distance is 5.006mm, and the effective aperture is 9.755mm; the curvature radius of the seventh mirror is -10.25mm, the mirror distance is 4.5mm, and the effective aperture is 10.218mm; the curvature radius of the eighth mirror is -16.197mm, the mirror distance is 6.055mm, and the effective aperture is 10.613mm; the mirror distance of the ninth mirror is 10mm, and the effective aperture is 9.49mm; the mirror distance of the tenth mirror is 10mm, and the effective aperture is 10.97mm; The refractive index and Abbe coefficient of the first lens are 1.61 and 58.9 respectively; the refractive index and Abbe coefficient of the second lens are 1.62 and 56.9 respectively; the refractive index and Abbe coefficient of the third lens are 1.56 and 60.8 respectively; the refractive index and Abbe coefficient of the fourth lens are 1.90 and 31.4 respectively; the refractive index and Abbe coefficient of the first prism are 1.59 and 61.0 respectively.

[0009] In some embodiments, the first light guide assembly includes: A liquid lens, wherein the liquid lens is used to focus the first light beam so that the first light beam reaches the fundus of the eyeball to be tested; A fiber coupler, the fiber coupler is used to split the first light beam into a sample light beam and a reference light beam; after being reflected by the first reflection component, the sample light beam passes through the second light guide component, the third light guide component, and the fourth light guide component in sequence to the eyeball to be tested, and then returns to the fiber coupler along the original path; after returning along the original path, the sample light beam interferes with the reference light beam to generate interference information; based on the interference information, an optical coherence tomography image is obtained through an image transformation algorithm; The first reflection component is used to reflect the first light beam to complete the XY linear scanning of the fundus of the eye to be tested.

[0010] In some embodiments, the second light guide assembly includes: A fifth lens, a sixth lens, and a seventh lens arranged on the same optical axis; a second prism; and the second prism is adjacent to the first prism; The fifth lens is provided with an eleventh mirror surface and a twelfth mirror surface; the eleventh mirror surface close to the eyeball to be tested is a convex surface, and the twelfth mirror surface away from the eyeball to be tested is a convex surface; The sixth lens is provided with a thirteenth mirror surface and a fourteenth mirror surface; the thirteenth mirror surface close to the eyeball to be tested is a concave surface, and the fourteenth mirror surface away from the eyeball to be tested is a concave surface; The seventh lens is provided with a fifteenth mirror surface and a sixteenth mirror surface; the fifteenth mirror surface on the side close to the eyeball to be tested is a concave surface, and the sixteenth mirror surface on the side away from the eyeball to be tested is a convex surface; The second prism is provided with a seventeenth mirror surface and an eighteenth mirror surface; the seventeenth mirror surface is connected to the tenth mirror surface; the seventeenth mirror surface close to the eyeball to be tested is an inclined surface, and the eighteenth mirror surface away from the eyeball to be tested is a vertical surface; the angle between the seventeenth mirror surface and the eighteenth mirror surface is 45°.

[0011] In some embodiments, the radius of curvature of the eleventh mirror surface is 24.59 mm, the mirror distance is 4.1 mm, and the effective aperture is 7.462 mm; the radius of curvature of the twelfth mirror surface is -19.289 mm, the mirror distance is 3.377 mm, and the effective aperture is 7.268 mm; the radius of curvature of the thirteenth mirror surface is -9.468 mm, the mirror distance is 5 mm, and the effective aperture is 5.152 mm; the radius of curvature of the fourteenth mirror surface is 29.953 mm, the mirror distance is 3. 67mm, the effective aperture is 5.507mm; the curvature radius of the fifteenth mirror is -114.106mm, the mirror distance is 4.8mm, and the effective aperture is 6.28mm; the curvature radius of the sixteenth mirror is -12.377mm, the mirror distance is 28.396mm, and the effective aperture is 6.786mm; the mirror distance of the seventeenth mirror is 10mm, and the effective aperture is 10mm; the mirror distance of the eighteenth mirror is 10mm, and the effective aperture is 10mm; The refractive index and Abbe coefficient of the fifth lens are 1.68 and 55.5 respectively; the refractive index and Abbe coefficient of the sixth lens are 1.85 and 23.8 respectively; the refractive index and Abbe coefficient of the seventh lens are 1.73 and 54.7 respectively; the refractive index and Abbe coefficient of the second prism are 1.59 and 61.0 respectively.

[0012] In some embodiments, the sixth light guide assembly includes: an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, and a thirteenth lens arranged on the same optical axis; The second reflective component is a third prism; the third prism is adjacent to the first prism; The eighth lens is provided with a nineteenth mirror surface and a twenty-third mirror surface; the nineteenth mirror surface close to the eyeball to be tested is a convex surface, and the twentieth mirror surface away from the eyeball to be tested is a concave surface; The ninth lens is provided with a twenty-first mirror surface and a twenty-second mirror surface; the twenty-first mirror surface close to the eyeball to be tested is a concave surface, and the twenty-second mirror surface away from the eyeball to be tested is a concave surface; The tenth lens is provided with a twenty-third mirror surface and a twenty-fourth mirror surface; the twenty-third mirror surface close to the eyeball to be tested is a convex surface, and the twenty-fourth mirror surface away from the eyeball to be tested is a convex surface; The eleventh lens is provided with a twenty-fifth mirror surface and a twenty-sixth mirror surface; the twenty-fifth mirror surface close to the eyeball to be tested is a convex surface, and the twenty-sixth mirror surface away from the eyeball to be tested is a convex surface; The twelfth lens is provided with a twenty-seventh mirror surface and a twenty-eighth mirror surface; the twenty-seventh mirror surface close to the eyeball to be tested is a concave surface, and the twenty-eighth mirror surface away from the eyeball to be tested is a concave surface; The thirteenth lens is provided with a twenty-ninth mirror surface and a thirtieth mirror surface; the twenty-ninth mirror surface close to the eyeball to be tested is a concave surface, and the thirtieth mirror surface away from the eyeball to be tested is a convex surface; The third prism is provided with a thirty-first mirror surface and a thirty-second mirror surface; the thirty-first mirror surface close to the eyeball to be tested is an inclined surface, and the thirty-second mirror surface away from the eyeball to be tested is a vertical surface; the angle between the thirty-first mirror surface and the thirty-second mirror surface is 45°.

[0013] In some embodiments, the curvature radius of the nineteenth mirror surface is 105.992 mm, the mirror distance is 2.7 mm, and the effective aperture is 6.285 mm; the curvature radius of the twentieth mirror surface is 76.562 mm, the mirror distance is 7.435 mm, and the effective aperture is 6.006 mm; the curvature radius of the twenty-first mirror surface is -7.573 mm, the mirror distance is 4.5 mm, and the effective aperture is 2.822 mm; the curvature radius of the twenty-second mirror surface is -7.573 mm, the mirror distance is 4.5 mm, and the effective aperture is 2.822 mm. The curvature radius of the 23rd mirror is 28.574mm, the mirror distance is 3.1mm, and the effective aperture is 2.428mm; the curvature radius of the 24th mirror is -53.665mm, the mirror distance is 0.169mm, and the effective aperture is 2.383mm; the curvature radius of the 25th mirror is 5.61mm, the mirror distance is The curvature radius of the 26th mirror is -11.543mm, the mirror distance is 0.598mm, and the effective light aperture is 2.337mm; the curvature radius of the 27th mirror is -7.392mm, the mirror distance is 5.6mm, and the effective light aperture is 2.199mm; the curvature radius of the 28th mirror is 32.101mm, the mirror distance is 1.487mm, and the effective light aperture is 2.184mm; the curvature radius of the 29th mirror surface is -2.879mm, the mirror distance is 2.4mm, and the effective light aperture is 2.149mm; the curvature radius of the 30th mirror surface is -4.386mm, the mirror distance is 0.6mm, and the effective light aperture is 3.058mm; the mirror distance of the 31st mirror surface is 10mm, and the effective light aperture is 10mm; the mirror distance of the 32nd mirror surface is 10mm, and the effective light aperture is 10mm; The refractive index and Abbe coefficient of the eighth lens are 1.61 and 58.9 respectively; the refractive index and Abbe coefficient of the ninth lens are 1.62 and 36.3 respectively; the refractive index and Abbe coefficient of the tenth lens are 1.66 and 57.3 respectively; the refractive index and Abbe coefficient of the eleventh lens are 1.66 and 54.6 respectively; the refractive index and Abbe coefficient of the twelfth lens are 1.81 and 25.5 respectively; the refractive index and Abbe coefficient of the thirteenth lens are 1.85 and 23.8 respectively; the refractive index and Abbe coefficient of the third prism are 1.61 and 58.6 respectively.

[0014] In some embodiments, the focal length of the first lens is -12.76 mm; the focal length of the second lens is 369.158 mm; the focal length of the third lens is 38.548 mm; the focal length of the fourth lens is -84.392 mm; The focal length of the fifth lens is 18.955 mm; the focal length of the sixth lens is -8.289 mm; the focal length of the seventh lens is 16.811 mm; The focal length of the eighth lens is 27.212 mm, the focal length of the ninth lens is -12.135 mm, the focal length of the tenth lens is 43.147 mm, the focal length of the eleventh lens is 8.405 mm, the focal length of the twelfth lens is -9.097 mm, and the focal length of the thirteenth lens is -3.367 mm.

[0015] A second aspect of the present application provides an imaging system, comprising: A first light guide component, a first reflection component, a second light guide component, a third light guide component, a fourth light guide component, a fifth light guide component, a second reflection component, a sixth light guide component, and a sensor; the first light guide component, the first reflection component, the second light guide component, the third light guide component, and the fourth light guide component are arranged on the same optical axis; the third light guide component, the fourth light guide component, the fifth light guide component, the second reflection component, the sixth light guide component, and the sensor are arranged on the same optical axis; the third light guide component is adjacent to the fourth light guide component and the second reflection component; The first light guide component is used to receive a first light beam emitted by a first light source, and split the first light beam into a reference light beam and a sample light beam; the sample light beam is reflected by the first reflection component and then sequentially passes through the second light guide component, the third light guide component, and the fourth light guide component to the eyeball to be tested, and then returns to the first light guide component along the original route; the sample light beam after returning along the original route interferes with the reference light beam to generate interference information; based on the interference information, an optical coherence tomography image is obtained through an image transformation algorithm; the first light guide component, the second light guide component, the third light guide component, and the fourth light guide component are used to guide the first light beam; the first reflection component is used to reflect the first light beam; the wavelength length of the first light beam is a first preset length; The sensor is used to receive a second light beam emitted by a second light source and sequentially passing through the fifth light guide component, the fourth light guide component, the third light guide component, the second reflection component, and the sixth light guide component, and obtain a fundus color image based on the second light beam; the fifth light guide component, the fourth light guide component, and the sixth light guide component are used to guide the second light beam; the third light guide component and the second reflection component are used to reflect the second light beam; the wavelength length of the second light beam is a second preset length; The reflective surface of the third light guide component is provided with a first reflective film and a second reflective film; the first reflective film is used to guide the light beam in the first preset length band, and the second reflective film is used to reflect the light beam in the second preset length band.

[0016] The present application provides an imaging method and system, the method comprising: a first light source emits a first light beam into a first light guide component, the first light beam is divided into a reference light beam and a sample light beam by the first light guide component; the sample light beam is reflected by a first reflection component and then sequentially passes through a second light guide component, a third light guide component, and a fourth light guide component to an eyeball to be tested, and then returns to the first light guide component along the original route; the sample light beam after returning along the original route interferes with the reference light beam to generate interference information; the first light guide component, the second light guide component, the third light guide component, and the fourth light guide component are used to guide the first light beam; the first reflection component is used to reflect the first light beam; the wavelength length of the first light beam is a first preset length; based on the interference information, an optical coherence tomography image is obtained by an image transformation algorithm; a second light source emits a second light beam into a fifth light guide component and then passes through the fourth light guide component to the eyeball to be tested To the third light guide component; the second light beam is reflected by the reflective surface of the third light guide component to the second reflective component; the second light beam is reflected by the reflective surface of the second reflective component to the sixth light guide component; the second light beam passes through the sixth light guide component to the sensor; the fifth light guide component, the fourth light guide component and the sixth light guide component are used to guide the second light beam; the third light guide component and the second reflective component are used to reflect the second light beam; the band length of the second light beam is the second preset length; based on the second light beam, a fundus color image is obtained; wherein the reflective surface of the third light guide component is provided with a first reflective film and a second reflective film; the first reflective film is used to guide the light beam of the first preset length band, and the second reflective film is used to reflect the light beam of the second preset length band, so as to solve the problem that the imaging method of the current imaging device cannot simultaneously generate optical coherence tomography images and fundus color images. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a flow chart of the imaging method in this application; Figure 2 Schematic diagram of the structure of the imaging system in this application; Figure 3 This is a schematic diagram of the structure of the optical coherence tomography imaging light path in this application; Figure 4 This is a schematic diagram of the structure of the imaging optical path of the fundus color image in this application; Figure 5 It is the lateral aberration diagram of the zero field of view of the imaging optical path of the fundus color image in this application; Figure 6 It is the 0.7 field of view lateral aberration diagram of the fundus color image imaging optical path in this application; Figure 7 It is a lateral aberration diagram of the field of view of the imaging optical path of the fundus color image in this application; Figure 8 is a full-field transfer function curve diagram of the fundus color image imaging optical path in this application; Fig. 9 is the axial chromatic aberration diagram of the imaging light path of the fundus color image in this application; Fig.10 is a magnification chromatic aberration diagram of the imaging optical path of the fundus color image in this application; Fig.11 A field curvature diagram of the imaging optical path of the fundus color image in this application; Fig.12 is a distortion diagram of the imaging optical path of the fundus color image in this application; Fig.13 It is a schematic diagram of the structure of the optical coherence tomography imaging light path in one embodiment of the present application.

[0019] Description of reference numerals: 1-first light-guiding component; 11-liquid lens; 12-fiber coupler; 2-first reflective component; 3-second light-guiding component; 31-fifth lens; 32-sixth lens; 33-seventh lens; 34-second prism; 4-third light-guiding component; 5-fourth light-guiding component; 51-first lens; 52-second lens; 53-third lens; 54-fourth lens; 6-fifth light-guiding component; 7-second reflective component; 8-sixth light-guiding component; 81-eighth lens; 82-ninth lens; 83-tenth lens; 84-eleventh lens; 85-twelfth lens; 86-thirteenth lens; 9-sensor. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0021] Since in some technologies, the imaging method of the imaging device cannot generate an optical coherence tomography image and a fundus color image at the same time, in order to solve this technical problem, the present application provides an imaging method and system, which are described below: For example, Optical Coherence Tomography (OCT) is a non-invasive, non-destructive optical imaging technology that can obtain depth resolution information inside a sample and is currently widely used in the field of ophthalmic diagnosis. Fundus cameras can record color fundus images to assist doctors in diagnosing fundus diseases and this technology is already quite mature, but the imaging methods of imaging devices currently on the market cannot simultaneously generate optical coherence tomography images and fundus color images.

[0022] Depend on Figure 1 It can be seen that in view of the above problems, the first aspect of the present application provides an imaging method, comprising the following steps: S100: A first light source emits a first light beam into a first light guide component 1, and the first light beam is branched into a reference light beam and a sample light beam by the first light guide component 1; the sample light beam is reflected by the first reflection component 2 and passes through the second light guide component 3, the third light guide component 4, and the fourth light guide component 5 in sequence to the eyeball to be tested, and then returns to the first light guide component 1 along the original route; the sample light beam after returning along the original route interferes with the reference light beam to generate interference information; the first light guide component 1, the second light guide component 3, the third light guide component 4, and the fourth light guide component 5 are used to guide the first light beam; the first reflection component 2 is used to reflect the first light beam; the wavelength band length of the first light beam is a first preset length; the first preset length range is 800-1300nm.

[0023] S200: Based on the interference information, an optical coherence tomography image is obtained by using an image transformation algorithm.

[0024] In this embodiment, the first light source emits a first light beam through the optical fiber to the first light guide component 1, and the first light beam through the first light guide component 1 continues to be transmitted to the first reflection component 2. The first reflection component 2 deflects and reflects the first light beam and passes through the second light guide component 3, the third light guide component 4, and the fourth light guide component 5 in sequence to the eyeball to be tested and then reaches the fundus to illuminate the retina. After the first light beam is reflected by the retina, it is reflected back into the optical fiber in the opposite direction of the original light path. This path is called the sample light path, that is, the optical coherence tomography imaging light path. The sample light path and the reference light path complete interference in the first light guide component 1 and finally obtain the optical coherence tomography image through the image transformation algorithm. The first light source used in this application is a laser light source, and the first reflection component 2 is a MEMS galvanometer. For example, the first light beam in the optical coherence tomography imaging optical path passes through the optical coherence tomography imaging optical path and is focused on the retina of the fundus to obtain an imaging with an Airy disk radius of 16.09um and a diffuse spot RMS radius of 1.465um; the diffuse spot RMS radius is within the range of the Airy disk radius, indicating that the imaging effect is good. At the same time, the first light beam can achieve a large-scale fundus scanning with a full field of view of 80 degrees through the deflection of the second light guide component 3. Fig.13 As shown, according to the reversible principle of the optical path, the first light beam emitted by the first light source hits the retina of the fundus and then reflects through the fourth light guide component 5, the third light guide component 4, the second light guide component 3, the first reflection component 2, and then enters the optical fiber coupler 12 in the first light guide component 1. Fig.13 The first fiber coupler in the reference arm interferes with the reference arm, and the interference information is finally transmitted to the external device. Fig.13 The second optical fiber coupler, the detector and the computer frequency domain transform obtain an optical coherence tomography image and send it to the image generation device for display.

[0025] S300: The second light source emits a second light beam to the fifth light guide component 6 to the eyeball to be tested, and then passes through the fourth light guide component 5 to the third light guide component 4; the second light beam is reflected by the reflection surface of the third light guide component 4 to the second reflection component 7; the second light beam is reflected by the reflection surface of the second reflection component 7 to the sixth light guide component 8; the second light beam passes through the sixth light guide component 8 to the sensor 9; finally, the second light beam is transmitted to the display device for display through the sensor 9; the fifth light guide component 6, the fourth light guide component 5, and the sixth light guide component 8 are used to guide the second light beam; the third light guide component 4 and the second reflection component 7 are used to reflect the second light beam; the wavelength length of the second light beam is the second preset length; the second preset length range is 400-700nm.

[0026] S400: Based on the second light beam, a fundus color image is obtained; wherein the reflective surface of the third light guide component 4 is provided with a first reflective film and a second reflective film; the first reflective film is used to guide the light beam of the first preset length band, and the second reflective film is used to reflect the light beam of the second preset length band. The first reflective film and the second reflective film are respectively stacked and plated on the reflective surface of the third light guide component 4, wherein the first reflective film can penetrate the light beam of the first preset length wavelength, and the second reflective film is used to reflect the light beam of the second preset length wavelength.

[0027] In the imaging method provided in the present application, two light sources are arranged and a first reflective film and a second reflective film are arranged on the reflective surface of the third light guide component 4. Light beams of different bands are transmitted and reflected by the first reflective film and the second reflective film, so that one system generates two different optical paths, namely, a fundus color image imaging optical path and an optical coherence tomography image imaging optical path. Therefore, a fundus color image and an optical coherence tomography image can be obtained simultaneously through one system, thereby realizing a device that combines optical coherence tomography images and fundus color images, providing convenience for medical staff in diagnosing patients and improving the efficiency of diagnosis.

[0028] Depend on Figures 2 to 4It can be seen that the fourth light guide component 5 includes: a first lens 51, a second lens 52, a third lens 53, and a fourth lens 54 arranged on the same optical axis; the third light guide component 4 is a first prism; the first lens 51 is provided with a first mirror surface and a second mirror surface; the first mirror surface close to the side of the eyeball to be tested is a concave surface, and the second mirror surface away from the side of the eyeball to be tested is a convex surface; the second lens 52 is provided with a third mirror surface and a fourth mirror surface; the third mirror surface close to the side of the eyeball to be tested is a concave surface, and the fourth mirror surface away from the side of the eyeball to be tested is a convex surface; the third lens 53 A fifth mirror and a sixth mirror are provided; the fifth mirror close to the eyeball to be tested is a convex surface, and the sixth mirror away from the eyeball to be tested is a concave surface; the fourth lens 54 is provided with a seventh mirror and an eighth mirror; the seventh mirror close to the eyeball to be tested is a concave surface, and the eighth mirror away from the eyeball to be tested is a convex surface; the first prism is provided with a ninth mirror and a tenth mirror; the ninth mirror close to the eyeball to be tested is a vertical surface, and the tenth mirror away from the eyeball to be tested is an inclined surface; the angle between the ninth mirror and the tenth mirror is 45°. Through the combination of the above lenses and prisms, the functions of collecting, focusing, correcting and separating the light paths are realized, which helps to optimize the imaging quality and reduce aberrations and chromatic aberrations. The first light beam and the second light beam are focused and the aberrations are balanced through the fourth light guide component 5, and the optical paths of the first light beam and the second light beam are separated through the third light guide component 4, so that the imaging system combines two imaging modes, namely optical coherence tomography imaging, i.e., optical coherence tomography image and fundus color image.

[0029] For example, the first mirror has a curvature radius of -7.8 mm, a mirror distance of 3.8 mm, and an effective aperture of 1.085 mm; the second mirror has a curvature radius of -7.856 mm, a mirror distance of 3.214 mm, and an effective aperture of 3.251 mm; the third mirror has a curvature radius of -230.877 mm, a mirror distance of 5.5 mm, and an effective aperture of 6.793 mm; the fourth mirror has a curvature radius of -11.761 mm, a mirror distance of 1.085 mm, and an effective aperture of 1.085 mm; The distance is 6.483mm, and the effective aperture is 7.835mm; the curvature radius of the fifth mirror is 21.822mm, the mirror distance is 5.8mm, and the effective aperture is 10.131mm; the curvature radius of the sixth mirror is 15.579mm, the mirror distance is 5.006mm, and the effective aperture is 9.755mm; the curvature radius of the seventh mirror is -10.25mm, the mirror distance is 4.5mm, and the effective aperture is 10.218mm; The curvature radius of the eighth mirror surface is -16.197 mm, the mirror distance is 6.055 mm, and the effective aperture is 10.613 mm; the mirror distance of the ninth mirror surface is 10 mm, and the effective aperture is 9.49 mm; the mirror distance of the tenth mirror surface is 10 mm, and the effective aperture is 10.97 mm; the refractive index and Abbe coefficient of the first lens 51 are 1.61 and 58.9 respectively; the refractive index and Abbe coefficient of the second lens 52 are 1.62 and 56.9 respectively; The refractive index and Abbe coefficient of the third lens 53 are 1.56 and 60.8 respectively; the refractive index and Abbe coefficient of the fourth lens 54 are 1.90 and 31.4 respectively; the refractive index and Abbe coefficient of the first prism are 1.59 and 61.0 respectively; the focal length of the first lens 51 is -12.76mm; the focal length of the second lens 52 is 369.158mm; the focal length of the third lens 53 is 38.548mm; the focal length of the fourth lens 54 is -84.392mm.

[0030] Among them, the radius of curvature determines the degree of curvature of the mirror surface, which is positive for convex lenses and negative for concave lenses; the radius of curvature determines the focusing ability of the lens or mirror surface. The mirror distance indicates the distance from the mirror surface to the next optical element; the mirror distance affects the optical path length and the overall focal length of the optical system. The effective aperture indicates the maximum diameter that the optical element can allow light to pass through, which determines the light collection ability and imaging range of the system. The refractive index represents the refracting ability of the material to light and is an important parameter in the design of optical lenses. Different refractive indices will change the propagation path of light in the lens. The Abbe coefficient, also known as the dispersion coefficient, represents the degree of dispersion of the material to light of different wavelengths. Materials with high Abbe coefficients usually have lower dispersion, which helps to reduce chromatic aberration in the optical system. The focal length of each lens determines its ability to focus or diverge light. A lens with a negative focal length is a diverging lens, while a lens with a positive focal length is a focusing lens. The lens with the above-mentioned set parameters can better focus the first and second beams and balance the aberrations, making the generated fundus color images and optical coherence tomography images clearer.

[0031] Depend on Figure 2 It can be known that the first light guide component 1 includes: a liquid lens 11, which is used to focus the first light beam so that the first light beam reaches the fundus of the eyeball to be tested; a fiber coupler 12, which is used to split the first light beam into a sample beam and a reference beam; the sample beam is reflected by the first reflection component 2, and then passes through the second light guide component 3, the third light guide component 4, and the fourth light guide component 5 in sequence to the eyeball to be tested, and then returns to the fiber coupler 12 along the original route; the sample beam after returning along the original route interferes with the reference beam to generate interference information; based on the interference information, an optical coherence tomography image is obtained through an image transformation algorithm; the first reflection component 2 is used to reflect the first light beam to complete the XY linear scanning of the fundus of the eyeball to be tested. The XY linear scanning of the fundus refers to the first light beam moving in the horizontal (X-axis) and vertical (Y-axis) directions to obtain images of different areas of the fundus, thereby obtaining a complete optical coherence tomography image.

[0032] Depend on Figure 3It can be seen that the second light guide component 3 includes: a fifth lens 31, a sixth lens 32, a seventh lens 33, and a second prism 34 arranged on the same optical axis; the fifth lens 31 is provided with an eleventh mirror surface and a twelfth mirror surface; the eleventh mirror surface close to the side of the eyeball to be tested is a convex surface, and the twelfth mirror surface away from the side of the eyeball to be tested is a convex surface; the sixth lens 32 is provided with a thirteenth mirror surface and a fourteenth mirror surface; the thirteenth mirror surface close to the side of the eyeball to be tested is a concave surface, and the fourteenth mirror surface away from the side of the eyeball to be tested is a concave surface. Concave surface; the seventh lens 33 is provided with a fifteenth mirror surface and a sixteenth mirror surface; the fifteenth mirror surface close to the side of the eyeball to be tested is a concave surface, and the sixteenth mirror surface away from the side of the eyeball to be tested is a convex surface; the second prism 34 is provided with a seventeenth mirror surface and an eighteenth mirror surface; the seventeenth mirror surface is connected to the tenth mirror surface; the seventeenth mirror surface close to the side of the eyeball to be tested is an inclined surface, and the eighteenth mirror surface away from the side of the eyeball to be tested is a vertical surface; the angle between the seventeenth mirror surface and the eighteenth mirror surface is 45°. Through the combination of the above lenses and prisms, the functions of collecting, focusing, correcting and separating the light paths are realized, which helps to optimize the imaging quality and reduce aberrations and chromatic aberrations.

[0033] Exemplarily, the radius of curvature of the eleventh mirror is 24.59mm, the mirror distance is 4.1mm, and the effective aperture is 7.462mm; the radius of curvature of the twelfth mirror is -19.289mm, the mirror distance is 3.377mm, and the effective aperture is 7.268mm; the radius of curvature of the thirteenth mirror is -9.468mm, the mirror distance is 5mm, and the effective aperture is 5.152mm; the radius of curvature of the fourteenth mirror is 29.953mm, the mirror distance is 3.67mm, and the effective aperture is 5.507mm; the radius of curvature of the fifteenth mirror is -114.106mm, the mirror distance is 4.8mm, and the effective aperture is 6.28mm; the radius of curvature of the sixteenth mirror is -12.377mm, the mirror distance is 6.6mm, and the effective aperture is 7.268mm. The surface distance is 28.396mm and the effective aperture is 6.786mm; the seventeenth mirror surface has a surface distance of 10mm and an effective aperture of 10mm; the eighteenth mirror surface has a surface distance of 10mm and an effective aperture of 10mm; the refractive index and Abbe coefficient of the fifth lens 31 are 1.68 and 55.5 respectively; the refractive index and Abbe coefficient of the sixth lens 32 are 1.85 and 23.8 respectively; the refractive index and Abbe coefficient of the seventh lens 33 are 1.73 and 54.7 respectively; the refractive index and Abbe coefficient of the second prism 34 are 1.59 and 61.0 respectively; the focal length of the fifth lens 31 is 18.955mm; the focal length of the sixth lens 32 is -8.289mm; and the focal length of the seventh lens 33 is 16.811mm. The lens with the above-mentioned parameters can better focus the first light beam and balance the aberration, so that the generated optical coherence tomography image is clearer.

[0034] Exemplarily, the fundus color image imaging optical path provided by the present application has the following beneficial effects: like Figure 5 Shown is a zero-field lateral aberration diagram of the fundus color image imaging optical path provided in the present application. Figure 5 The horizontal coordinates Py and Px represent the entrance pupil, and the vertical coordinates ey and ex represent the lateral aberration, where y represents the meridional direction and x represents the sagittal direction. The lateral aberration of each wavelength in the wavelength band from 0.45um to 0.656um and each entrance pupil position is within ±3um. It can be seen from the figure that the aberration balance is very good and the imaging is excellent. Figure 5 The horizontal axis is the normalized entrance pupil; the maximum vertical axis is +5um and the minimum vertical axis is -5um.

[0035] like Figure 6 Shown is a 0.7 field of view lateral aberration diagram of the fundus color image imaging optical path provided in the present application. Figure 6The horizontal coordinates Py and Px represent the entrance pupil, and the vertical coordinates ey and ex represent the lateral aberration, where y represents the meridional direction and x represents the sagittal direction. The lateral aberration of each wavelength in the wavelength band from 0.45um to 0.656um and each entrance pupil position is within ±4um. It can be seen from the figure that the aberration balance is very good and the imaging is excellent. Figure 6 The horizontal axis is the normalized entrance pupil; the maximum vertical axis is +5um and the minimum vertical axis is -5um.

[0036] like Figure 7 Shown is a lateral aberration diagram of the field of view of the imaging optical path of the fundus color image provided by the present application. Figure 7 The horizontal coordinates Py and Px represent the entrance pupil, and the vertical coordinates ey and ex represent the lateral aberration, where y represents the meridional direction and x represents the sagittal direction. The lateral aberration of each wavelength in the wavelength band from 0.45um to 0.656um and each entrance pupil position is within ±7um. It can be seen from the figure that the aberration balance is very good and the imaging is excellent. Figure 7 The horizontal axis is the normalized entrance pupil; the maximum vertical axis is +10um and the minimum vertical axis is -10um.

[0037] like Figure 8 Shown is a full-field transfer function curve of the fundus color image imaging optical path provided by the present application. Figure 8 The vertical axis is the normalized OTF modulus, and the horizontal axis is the spatial frequency, in lp / mm. The figure shows that the transfer function values ​​of the on-axis field of view and the off-axis field of view are both high, indicating that the imaging contrast of the full field of view of the optical system is very high, and the imaging layering is clear.

[0038] like Fig. 9 Shown is an axial chromatic aberration diagram of the imaging light path of the fundus color image provided by the present application. Fig. 9 The vertical axis represents the entrance pupil, and the horizontal axis represents the longitudinal aberration, in mm. The axial chromatic aberration of any two wavelengths at each entrance pupil position in the wavelength range of each light from 0.45um to 0.656um is less than 0.03mm. Fig. 9 The vertical axis is the normalized entrance pupil; the horizontal axis represents the longitudinal aberration, with a maximum of 0.05mm and a minimum of -0.05mm.

[0039] like Fig.10 Shown is a magnification chromatic aberration diagram of the imaging light path of the fundus color image provided by the present application. Fig.10 The vertical axis represents the field of view, and the horizontal axis represents the lateral aberration, in um. The dotted line represents the size of the diffraction-limited Airy disk of the system, and the solid line indicates that the full field of view range of magnification chromatic aberration in each band from 0.45um to 0.656um is within the Airy disk range.

[0040] like Fig.11 and Fig.12Shown is a diagram of the field curvature distortion of the imaging optical path of the fundus color image provided by the present application. Fig.11 is the field curvature diagram, Fig.11 The vertical axis represents the field of view, and the horizontal axis represents the field curvature, with the unit being mm. The field curvature values ​​of each wavelength in the wavelength band from 0.45um to 0.656um and each field position are within ±30um, and the field curvature correction is good. Fig.11 The vertical axis is the normalized field of view; the horizontal axis represents the field curvature, with a maximum of 50um and a minimum of -50um. Fig.12 is the distortion map, Fig.12 The vertical axis represents the field of view, and the horizontal axis represents the distortion (percentage). The distortion of each wavelength in the wavelength band from 0.45um to 0.6560um at each field of view position is less than 1.5%. Fig.12 The vertical axis is the normalized field of view; the horizontal axis represents distortion, with a maximum of 2.0% and a minimum of -2.0%.

[0041] Depend on Figure 4It can be known that the sixth light guide component 8 includes: an eighth lens 81, a ninth lens 82, a tenth lens 83, an eleventh lens 84, a twelfth lens 85, and a thirteenth lens 86 arranged on the same optical axis; the second reflection component 7 is a third prism; the third prism is adjacent to the first prism; the eighth lens 81 is provided with a nineteenth mirror surface and a twenty-third mirror surface; the nineteenth mirror surface close to the side of the eyeball to be measured is a convex surface, and the twentieth mirror surface away from the side of the eyeball to be measured is a concave surface; the ninth lens 82 is provided with a twenty-first mirror surface and a twenty-second mirror surface; the twenty-first mirror surface close to the side of the eyeball to be measured is a concave surface, and the twenty-second mirror surface away from the side of the eyeball to be measured is a concave surface; the tenth lens 83 is provided with a twenty-third mirror surface and a twenty-fourth mirror surface; the twenty-third mirror surface close to the side of the eyeball to be measured is a convex surface, and the twenty-fourth mirror surface away from the side of the eyeball to be measured is a convex surface; The eleventh lens 84 is provided with a twenty-fifth mirror surface and a twenty-sixth mirror surface; the twenty-fifth mirror surface close to the eyeball to be tested is a convex surface, and the twenty-sixth mirror surface away from the eyeball to be tested is a convex surface; the twelfth lens 85 is provided with a twenty-seventh mirror surface and a twenty-eighth mirror surface; the twenty-seventh mirror surface close to the eyeball to be tested is a concave surface, and the twenty-eighth mirror surface away from the eyeball to be tested is a concave surface; the thirteenth lens 86 is provided with a twenty-ninth mirror surface and a thirtieth mirror surface; the twenty-ninth mirror surface close to the eyeball to be tested is a concave surface, and the thirtieth mirror surface away from the eyeball to be tested is a convex surface; the third prism is provided with a thirty-first mirror surface and a thirty-second mirror surface; the thirty-first mirror surface close to the eyeball to be tested is an inclined surface, and the thirty-second mirror surface away from the eyeball to be tested is a vertical surface; the angle between the thirty-first mirror surface and the thirty-second mirror surface is 45°. Through the combination of the above lenses and prisms, the functions of collecting, focusing, correcting and separating the light paths are realized, which helps to optimize the imaging quality and reduce aberrations and chromatic aberrations.

[0042] Exemplarily, the radius of curvature of the nineteenth mirror surface is 105.992 mm, the mirror distance is 2.7 mm, and the effective aperture is 6.285 mm; the radius of curvature of the twentieth mirror surface is 76.562 mm, the mirror distance is 7.435 mm, and the effective aperture is 6.006 mm; the radius of curvature of the twenty-first mirror surface is -7.573 mm, the mirror distance is 4.5 mm, and the effective aperture is 2.822 mm; the radius of curvature of the twenty-second mirror surface is 10.087 mm, the mirror distance is 0.642 mm, and the effective aperture is 2.415 mm; the radius of curvature of the twenty-third mirror surface is 28.574 mm, the mirror distance is 3.1 mm, and the effective aperture is 2.42 8mm; the radius of curvature of the 24th mirror is -53.665mm, the mirror distance is 0.169mm, and the effective aperture is 2.383mm; the radius of curvature of the 25th mirror is 5.61mm, the mirror distance is 4.3mm, and the effective aperture is 2.591mm; the radius of curvature of the 26th mirror is -11.543mm, the mirror distance is 0.598mm, and the effective aperture is 2.337mm; the radius of curvature of the 27th mirror is -7.392mm, the mirror distance is 5.6mm, and the effective aperture is 2.199mm; the radius of curvature of the 28th mirror is 32.101mm, the mirror distance is 1.487mm, and the effective aperture is 2. 184mm; the radius of curvature of the 29th mirror surface is -2.879mm, the mirror distance is 2.4mm, and the effective aperture is 2.149mm; the radius of curvature of the 30th mirror surface is -4.386mm, the mirror distance is 0.6mm, and the effective aperture is 3.058mm; the mirror distance of the 31st mirror surface is 10mm, and the effective aperture is 10mm; the mirror distance of the 32nd mirror surface is 10mm, and the effective aperture is 10mm; the refractive index and Abbe coefficient of the eighth lens 81 are 1.61 and 58.9 respectively; the refractive index and Abbe coefficient of the ninth lens 82 are 1.62 and 36.3 respectively; the refractive index and Abbe coefficient of the tenth lens 83 are 1.66 respectively , 57.3; the refractive index and Abbe coefficient of the eleventh lens 84 are 1.66 and 54.6 respectively; the refractive index and Abbe coefficient of the twelfth lens 85 are 1.81 and 25.5 respectively; the refractive index and Abbe coefficient of the thirteenth lens 86 are 1.85 and 23.8 respectively; the refractive index and Abbe coefficient of the third prism are 1.61 and 58.6 respectively; the focal length of the eighth lens 81 is 27.212mm, the focal length of the ninth lens 82 is -12.135mm, the focal length of the tenth lens 83 is 43.147mm, the focal length of the eleventh lens 84 is 8.405mm, the focal length of the twelfth lens 85 is -9.097mm, and the focal length of the thirteenth lens 86 is -3.367mm. The lens with the above parameters can better focus the second beam and balance the aberration, making the generated fundus color image clearer.

[0043] Depend on Figures 2 to 4 It can be seen that the second side of the present application provides an imaging system, including: a first light guide component 1, a first reflection component 2, a second light guide component 3, a third light guide component 4, a fourth light guide component 5, a fifth light guide component 6, a second reflection component 7, a sixth light guide component 8, and a sensor 9; the first light guide component 1, the first reflection component 2, the second light guide component 3, the third light guide component 4, and the fourth light guide component 5 are arranged on the same optical axis; the third light guide component 4, the fourth light guide component 5, the fifth light guide component 6, the second reflection component 7, the sixth light guide component 8, and the sensor 9 are arranged on the same optical axis; the third light guide component 4 is adjacent to the fourth light guide component 5 and the second reflection component 7; the first light guide component 1 is used to receive a first light beam emitted by a first light source, and split the first light beam into a reference light beam and a sample light beam; the sample light beam is reflected by the first reflection component 2 and passes through the second light guide component 3, the third light guide component 4, and the fourth light guide component 5 in sequence to the eyeball to be tested, and then returns to the first light guide component 1 along the original route; the sample light beam after returning along the original route interferes with the reference light beam to generate an interference beam The first light guide component 1, the second light guide component 3, the third light guide component 4, and the fourth light guide component 5 are used to guide the first light beam; the first reflection component 2 is used to reflect the first light beam; the wavelength band length of the first light beam is a first preset length; the sensor 9 is used to receive the second light beam emitted by the second light source and sequentially passes through the fifth light guide component 6, the fourth light guide component 5, the third light guide component 4, the second reflection component 7, and the sixth light guide component 8, and obtain a fundus color image based on the second light beam; the fifth light guide component 6, the fourth light guide component 5, and the sixth light guide component 8 are used to guide the second light beam; the third light guide component 4 and the second reflection component 7 are used to reflect the second light beam; the wavelength band length of the second light beam is a second preset length; wherein the reflection surface of the third light guide component is provided with a first reflection film and a second reflection film; the first reflection film is used to guide the light beam of the first preset length band, and the second reflection film is used to reflect the light beam of the second preset length band. The effects of each part of the above system during operation can be referred to the above method embodiment, which will not be repeated here.

[0044] It is worth noting that the imaging system provided by the present application can be applied to portable devices, such as Figure 2As shown, when taking eye samples, the eyeball to be tested can be attached to the test end of the device, and the test end fits tightly with the eyeball to be tested. Since the device is movable, the position of the device can be adjusted at any time even if the head of the person to be tested is offset, so that the imaging system provided by the present application can be applied to the field of infants and young children, increasing the scope of application of the system.

[0045] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. An imaging method, characterized in that: include: A first light source emits a first light beam into a first light guide component, and the first light beam is divided into a reference light beam and a sample light beam by the first light guide component; the sample light beam is reflected by the first reflection component and sequentially passes through the second light guide component, the third light guide component, and the fourth light guide component to the eyeball to be tested, and then returns to the first light guide component along the original path; the sample light beam after returning along the original path interferes with the reference light beam to generate interference information; the first light guide component, the second light guide component, the third light guide component, and the fourth light guide component are used to guide the first light beam; the first reflection component is used to reflect the first light beam; the wavelength length of the first light beam is a first preset length; Based on the interference information, an optical coherence tomography image is obtained by an image transformation algorithm; The second light source emits a second light beam to the fifth light guide component to the eyeball to be tested, and then passes through the fourth light guide component to the third light guide component; the second light beam is reflected to the second reflection component through the reflection surface of the third light guide component; the second light beam is reflected to the sixth light guide component through the reflection surface of the second reflection component; the second light beam passes through the sixth light guide component to the sensor; the fifth light guide component, the fourth light guide component, and the sixth light guide component are used to guide the second light beam; the third light guide component and the second reflection component are used to reflect the second light beam; the wavelength length of the second light beam is a second preset length; Based on the second light beam, obtaining a fundus color image; The reflective surface of the third light guide component is provided with a first reflective film and a second reflective film; the first reflective film is used to guide the light beam in the first preset length band, and the second reflective film is used to reflect the light beam in the second preset length band.

2. An imaging method according to claim 1, characterized in that: The fourth light guide component comprises: A first lens, a second lens, a third lens, and a fourth lens arranged on the same optical axis; The third light guide component is a first prism; The first lens is provided with a first mirror surface and a second mirror surface; the first mirror surface close to the eyeball to be tested is a concave surface, and the second mirror surface away from the eyeball to be tested is a convex surface; The second lens is provided with a third mirror surface and a fourth mirror surface; the third mirror surface close to the eyeball to be tested is a concave surface, and the fourth mirror surface away from the eyeball to be tested is a convex surface; The third lens is provided with a fifth mirror surface and a sixth mirror surface; the fifth mirror surface close to the eyeball to be tested is a convex surface, and the sixth mirror surface away from the eyeball to be tested is a concave surface; The fourth lens is provided with a seventh mirror surface and an eighth mirror surface; the seventh mirror surface close to the eyeball to be tested is a concave surface, and the eighth mirror surface away from the eyeball to be tested is a convex surface; The first prism is provided with a ninth mirror surface and a tenth mirror surface; the ninth mirror surface close to the eyeball to be tested is a vertical surface, and the tenth mirror surface away from the eyeball to be tested is an inclined surface; the angle between the ninth mirror surface and the tenth mirror surface is 45°.

3. An imaging method according to claim 2, characterized in that: The first mirror has a curvature radius of -7.8mm, a mirror distance of 3.8mm, and an effective aperture of 1.085mm; the second mirror has a curvature radius of -7.856mm, a mirror distance of 3.214mm, and an effective aperture of 3.251mm; the third mirror has a curvature radius of -230.877mm, a mirror distance of 5.5mm, and an effective aperture of 6.793mm; the fourth mirror has a curvature radius of -11.761mm, a mirror distance of 6.483mm, and an effective aperture of 7.835mm; the fifth mirror has a curvature radius of 21.822mm, a mirror distance of 5.8mm, and an effective aperture of The effective aperture is 10.131mm; the curvature radius of the sixth mirror is 15.579mm, the mirror distance is 5.006mm, and the effective aperture is 9.755mm; the curvature radius of the seventh mirror is -10.25mm, the mirror distance is 4.5mm, and the effective aperture is 10.218mm; the curvature radius of the eighth mirror is -16.197mm, the mirror distance is 6.055mm, and the effective aperture is 10.613mm; the mirror distance of the ninth mirror is 10mm, and the effective aperture is 9.49mm; the mirror distance of the tenth mirror is 10mm, and the effective aperture is 10.97mm; The refractive index and Abbe coefficient of the first lens are 1.61 and 58.9 respectively; the refractive index and Abbe coefficient of the second lens are 1.62 and 56.9 respectively; the refractive index and Abbe coefficient of the third lens are 1.56 and 60.8 respectively; the refractive index and Abbe coefficient of the fourth lens are 1.90 and 31.4 respectively; the refractive index and Abbe coefficient of the first prism are 1.59 and 61.0 respectively.

4. An imaging method according to claim 3, characterized in that: The first light guide assembly comprises: A liquid lens, wherein the liquid lens is used to focus the first light beam so that the first light beam reaches the fundus of the eyeball to be tested; A fiber coupler, the fiber coupler is used to split the first light beam into a sample light beam and a reference light beam; after being reflected by the first reflection component, the sample light beam passes through the second light guide component, the third light guide component, and the fourth light guide component in sequence to the eyeball to be tested, and then returns to the fiber coupler along the original path; after returning along the original path, the sample light beam interferes with the reference light beam to generate interference information; based on the interference information, an optical coherence tomography image is obtained through an image transformation algorithm; The first reflection component is used to reflect the first light beam to complete the XY linear scanning of the fundus of the eye to be tested.

5. An imaging method according to claim 4, characterized in that: The second light guide assembly comprises: A fifth lens, a sixth lens, and a seventh lens arranged on the same optical axis; a second prism; and the second prism is adjacent to the first prism; The fifth lens is provided with an eleventh mirror surface and a twelfth mirror surface; the eleventh mirror surface close to the eyeball to be tested is a convex surface, and the twelfth mirror surface away from the eyeball to be tested is a convex surface; The sixth lens is provided with a thirteenth mirror surface and a fourteenth mirror surface; the thirteenth mirror surface close to the eyeball to be tested is a concave surface, and the fourteenth mirror surface away from the eyeball to be tested is a concave surface; The seventh lens is provided with a fifteenth mirror surface and a sixteenth mirror surface; the fifteenth mirror surface on the side close to the eyeball to be tested is a concave surface, and the sixteenth mirror surface on the side away from the eyeball to be tested is a convex surface; The second prism is provided with a seventeenth mirror surface and an eighteenth mirror surface; the seventeenth mirror surface is connected to the tenth mirror surface; the seventeenth mirror surface close to the eyeball to be tested is an inclined surface, and the eighteenth mirror surface away from the eyeball to be tested is a vertical surface; the angle between the seventeenth mirror surface and the eighteenth mirror surface is 45°.

6. An imaging method according to claim 5, characterized in that: The curvature radius of the eleventh mirror is 24.59mm, the mirror distance is 4.1mm, and the effective aperture is 7.462mm; the curvature radius of the twelfth mirror is -19.289mm, the mirror distance is 3.377mm, and the effective aperture is 7.268mm; the curvature radius of the thirteenth mirror is -9.468mm, the mirror distance is 5mm, and the effective aperture is 5.152mm; the curvature radius of the fourteenth mirror is 29.953mm, the mirror distance is 3.67mm , the effective aperture is 5.507mm; the curvature radius of the fifteenth mirror is -114.106mm, the mirror distance is 4.8mm, and the effective aperture is 6.28mm; the curvature radius of the sixteenth mirror is -12.377mm, the mirror distance is 28.396mm, and the effective aperture is 6.786mm; the seventeenth mirror has a mirror distance of 10mm and an effective aperture of 10mm; the eighteenth mirror has a mirror distance of 10mm and an effective aperture of 10mm; The refractive index and Abbe coefficient of the fifth lens are 1.68 and 55.5 respectively; the refractive index and Abbe coefficient of the sixth lens are 1.85 and 23.8 respectively; the refractive index and Abbe coefficient of the seventh lens are 1.73 and 54.7 respectively; the refractive index and Abbe coefficient of the second prism are 1.59 and 61.0 respectively.

7. An imaging method according to claim 6, characterized in that: The sixth light guide assembly comprises: an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, and a thirteenth lens arranged on the same optical axis; The second reflective component is a third prism; the third prism is adjacent to the first prism; The eighth lens is provided with a nineteenth mirror surface and a twenty-third mirror surface; the nineteenth mirror surface close to the eyeball to be tested is a convex surface, and the twentieth mirror surface away from the eyeball to be tested is a concave surface; The ninth lens is provided with a twenty-first mirror surface and a twenty-second mirror surface; the twenty-first mirror surface close to the eyeball to be tested is a concave surface, and the twenty-second mirror surface away from the eyeball to be tested is a concave surface; The tenth lens is provided with a twenty-third mirror surface and a twenty-fourth mirror surface; the twenty-third mirror surface close to the eyeball to be tested is a convex surface, and the twenty-fourth mirror surface away from the eyeball to be tested is a convex surface; The eleventh lens is provided with a twenty-fifth mirror surface and a twenty-sixth mirror surface; the twenty-fifth mirror surface close to the eyeball to be tested is a convex surface, and the twenty-sixth mirror surface away from the eyeball to be tested is a convex surface; The twelfth lens is provided with a twenty-seventh mirror surface and a twenty-eighth mirror surface; the twenty-seventh mirror surface close to the eyeball to be tested is a concave surface, and the twenty-eighth mirror surface away from the eyeball to be tested is a concave surface; The thirteenth lens is provided with a twenty-ninth mirror surface and a thirtieth mirror surface; the twenty-ninth mirror surface close to the eyeball to be tested is a concave surface, and the thirtieth mirror surface away from the eyeball to be tested is a convex surface; The third prism is provided with a thirty-first mirror surface and a thirty-second mirror surface; the thirty-first mirror surface close to the eyeball to be tested is an inclined surface, and the thirty-second mirror surface away from the eyeball to be tested is a vertical surface; the angle between the thirty-first mirror surface and the thirty-second mirror surface is 45°.

8. An imaging method according to claim 7, characterized in that: The curvature radius of the nineteenth mirror surface is 105.992 mm, the mirror distance is 2.7 mm, and the effective aperture is 6.285 mm; the curvature radius of the twentieth mirror surface is 76.562 mm, the mirror distance is 7.435 mm, and the effective aperture is 6.006 mm; the curvature radius of the twenty-first mirror surface is -7.573 mm, the mirror distance is 4.5 mm, and the effective aperture is 2.822 mm; the curvature radius of the twenty-second mirror surface is 10 .087mm, the mirror distance is 0.642mm, and the effective aperture is 2.415mm; the radius of curvature of the 23rd mirror is 28.574mm, the mirror distance is 3.1mm, and the effective aperture is 2.428mm; the radius of curvature of the 24th mirror is -53.665mm, the mirror distance is 0.169mm, and the effective aperture is 2.383mm; the radius of curvature of the 25th mirror is 5.61mm, the mirror distance is 4.3 The curvature radius of the 26th mirror is -11.543mm, the mirror distance is 0.598mm, and the effective aperture is 2.337mm; the curvature radius of the 27th mirror is -7.392mm, the mirror distance is 5.6mm, and the effective aperture is 2.199mm; the curvature radius of the 28th mirror is 32.101mm, the mirror distance is 1.487mm, and the effective aperture is 2. 184mm; the curvature radius of the 29th mirror surface is -2.879mm, the mirror distance is 2.4mm, and the effective light aperture is 2.149mm; the curvature radius of the 30th mirror surface is -4.386mm, the mirror distance is 0.6mm, and the effective light aperture is 3.058mm; the mirror distance of the 31st mirror surface is 10mm, and the effective light aperture is 10mm; the mirror distance of the 32nd mirror surface is 10mm, and the effective light aperture is 10mm; The refractive index and Abbe coefficient of the eighth lens are 1.61 and 58.9 respectively; the refractive index and Abbe coefficient of the ninth lens are 1.62 and 36.3 respectively; the refractive index and Abbe coefficient of the tenth lens are 1.66 and 57.3 respectively; the refractive index and Abbe coefficient of the eleventh lens are 1.66 and 54.6 respectively; the refractive index and Abbe coefficient of the twelfth lens are 1.81 and 25.5 respectively; the refractive index and Abbe coefficient of the thirteenth lens are 1.85 and 23.8 respectively; the refractive index and Abbe coefficient of the third prism are 1.61 and 58.6 respectively.

9. An imaging method according to claim 8, characterized in that: The focal length of the first lens is -12.76 mm; the focal length of the second lens is 369.158 mm; the focal length of the third lens is 38.548 mm; the focal length of the fourth lens is -84.392 mm; The focal length of the fifth lens is 18.955 mm; the focal length of the sixth lens is -8.289 mm; the focal length of the seventh lens is 16.811 mm; The focal length of the eighth lens is 27.212 mm, the focal length of the ninth lens is -12.135 mm, the focal length of the tenth lens is 43.147 mm, the focal length of the eleventh lens is 8.405 mm, the focal length of the twelfth lens is -9.097 mm, and the focal length of the thirteenth lens is -3.367 mm.

10. An imaging system, characterized in that: include: A first light guide component (1), a first reflection component (2), a second light guide component (3), a third light guide component (4), a fourth light guide component (5), a fifth light guide component (6), a second reflection component (7), a sixth light guide component (8), and a sensor (9); the first light guide component (1), the first reflection component (2), the second light guide component (3), the third light guide component (4), and the fourth light guide component (5) are arranged on the same optical axis; the third light guide component (4), the fourth light guide component (5), the fifth light guide component (6), the second reflection component (7), the sixth light guide component (8), and the sensor (9) are arranged on the same optical axis; the third light guide component (4) is adjacent to the fourth light guide component (5) and the second reflection component (7); The first light guide component (1) is used to receive a first light beam emitted by a first light source, and split the first light beam into a reference light beam and a sample light beam; the sample light beam is reflected by the first reflection component (2), passes through the second light guide component (3), the third light guide component (4), and the fourth light guide component (5) in sequence to the eyeball to be tested, and then returns to the first light guide component (1) along the original path; the sample light beam that returns along the original path interferes with the reference light beam to generate interference information; based on the interference information, an optical coherence tomography image is obtained through an image transformation algorithm; the first light guide component (1), the second light guide component (3), the third light guide component (4), and the fourth light guide component (5) are used to guide the first light beam; the first reflection component (2) is used to reflect the first light beam; the wavelength length of the first light beam is a first preset length; The sensor (9) is used to receive a second light beam emitted by a second light source and passing through the fifth light guide component (6), the fourth light guide component (5), the third light guide component (4), the second reflection component (7) and the sixth light guide component (8) in sequence, and obtain a fundus color image based on the second light beam; the fifth light guide component (6), the fourth light guide component (5) and the sixth light guide component (8) are used to guide the second light beam; the third light guide component (4) and the second reflection component (7) are used to reflect the second light beam; the wavelength band length of the second light beam is a second preset length; The reflective surface of the third light guide component is provided with a first reflective film and a second reflective film; the first reflective film is used to guide the light beam in the first preset length band, and the second reflective film is used to reflect the light beam in the second preset length band.

Images