WO2020175972A1 - Caméra de fond d'oeil ou caméra de fond d'oeil à fluorescence pourvue d'une cible de fixation interne sans trajet optique supplémentaire - Google Patents

Caméra de fond d'oeil ou caméra de fond d'oeil à fluorescence pourvue d'une cible de fixation interne sans trajet optique supplémentaire Download PDF

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Publication number
WO2020175972A1
WO2020175972A1 PCT/KR2020/002965 KR2020002965W WO2020175972A1 WO 2020175972 A1 WO2020175972 A1 WO 2020175972A1 KR 2020002965 W KR2020002965 W KR 2020002965W WO 2020175972 A1 WO2020175972 A1 WO 2020175972A1
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WIPO (PCT)
Prior art keywords
target
lens
fundus camera
light
fundus
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PCT/KR2020/002965
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English (en)
Korean (ko)
Inventor
권한조
박건형
Original Assignee
부산대학교병원
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Publication of WO2020175972A1 publication Critical patent/WO2020175972A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/14—Arrangements specially adapted for eye photography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/0091—Fixation targets for viewing direction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0071—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by measuring fluorescence emission

Definitions

  • the present invention is a fundus camera provided with a target for fixing the internal vision for aligning the optical axis of the photographing eye and the detector axis of the fundus camera or the fluorescent fundus camera, or
  • a fluorescent fundus camera when taking a fundus photograph or a fluorescent fundus photograph, it allows the macular and fovea to be accurately photographed and the desired peripheral region to be accurately photographed, but does not create an additional optical path and prevents the overall optical system from deteriorating or size change. It relates to a fundus camera or a fluorescent fundus camera with a target for fixing the internal sight without increasing the prepared optical path.
  • Fus cameras or fluorescent fundus cameras used in general ophthalmic examinations mainly use coaxial illumination fundus cameras to illuminate the fundus.
  • coaxial illumination is used for non- mydriatic and mydriatic fundus camera) and a key technology for maximizing the performance of a fluorescent fundus camera, meaning a camera in which the Imaging axis and the Illumination axis coincide (Fig. 1).
  • a target for eye fixation if the camera and the visual axis of the person coincide, the axis of the detector and the axis of illumination and the visual axis of the person coincide, so that the most vivid and evenly contrasted fundus picture can be obtained.
  • a target for fixing the sight of a general fundus camera is mounted on the outside of the camera, and the target is illuminated on the opposite side and adjusted to make the shot coincide with the axis of the detector. Tables are used a lot.
  • the above external sight-fixing targets are inexpensive, but have the disadvantage of having to design the system outside the camera, and this has the disadvantage that the size of the entire system is very large. In general, real name or low vision. In the case of the inner case, considering the reality of focusing on healthier eye examinations, in the case of patients with extremely low visual acuity opposite to the shooting, the use of an external type eye fixation target is not possible because the fixation target cannot be observed. Meaning can be degraded.
  • the target for fixing the eyeball inside the fundus camera or the fluorescent fundus camera there is an optical system corresponding to the target for fixing the eyeball inside the fundus camera or the fluorescent fundus camera, and by making the target look at the target through the camera's objective lens, the human vision axis and the detector axis of the camera are matched.
  • a target for fixing the line of sight is also used.
  • the target for fixing the internal line of sight can be finely adjusted in the X or Y axis, and this allows the surrounding fundus to be contrasted and photographed within the appropriate range as much as the blurring when the shot is moved. It is a device.
  • the above internal sight line fixing target is 2020/175972 1»(:1 ⁇ 1 ⁇ 2020/002965
  • an additional optical path is set using a beam splitter on the axis of the camera or the axis of the detector, followed by several illumination lenses and targets. This method is used in this manner. It has been used for a long time and has the disadvantage of generating an additional optical path to design a device corresponding to the target for fixing the line of sight, which increases the weight, size, and cost of the product, and the beam splitter for creating an additional optical path.
  • the signal of the axis e.g., the illumination axis or the detector axis
  • the signal of the axis is reduced, and a brighter illumination source is required for the illumination axis, and the detector axis requires a more sensitive imaging sensor or a brighter detector.
  • the need for an optical system leads to the disadvantage of shortening the operating time and increasing the cost as a result.
  • the present invention includes a standard for fixing the internal sight line that is generally used.
  • Its purpose is to solve the problem of a fundus camera or a fluorescent fundus camera, and to effectively form a target for eye fixation on the retina of a photographed eye to obtain a clear and evenly contrasted fundus picture.
  • the purpose is to provide a fundus camera or a fluorescent fundus camera that does not use an additional beam splitter even when an internal sight line fixing target is used.
  • the purpose of the present invention is to reduce the optical path by using the internal sight line fixing target.
  • the object of the present invention is to design a target for fixing the line of sight inside a fundus camera or a fluorescent fundus camera so that the performance of the entire optical system is not degraded, so that the target for fixing is effectively formed on the retina of the photographing eye, and is clearly and evenly contrasted. It is to acquire a fundus photograph and a fluorescent fundus photograph.
  • the purpose of the present invention is a fundus camera that does not require an optical system of an additional light source or a more sensitive imaging sensor or a brighter detector even if a target for fixing the line of sight is provided inside a fundus camera or a fluorescent fundus camera. Or to provide a fluorescent fundus camera.
  • a fundus camera or a fluorescent fundus camera equipped with an internal sight-fixing target without an increase in the optical path according to the present invention is an optical system for fixing the sight of a person, wherein the target optical system is a human vision.
  • It consists of a target illumination lens (24), arranged side by side and arranged such that the light extracted from the target adjustment lens (25) is located within the focal length of the lens;
  • a beam splitter 50 that is provided on an axis parallel to the illumination lens 30 and divides the light received from the illumination lens 30;
  • a fundus camera that does not use an additional beam splitter or
  • Fluorescent fundus camera can be provided.
  • the present invention can provide a fundus camera or a fluorescent fundus camera that does not increase the optical path even by using the internal sight line fixing target.
  • the eye-fixing target is designed inside a fundus camera or a fluorescent fundus camera so that the performance of the entire optical system is not degraded, so that the target for fixing is effectively formed on the retina in the photographing, and a clear and evenly contrasted fundus You can acquire photos and photos of fluorescent fundus.
  • the present invention provides a fundus camera or fluorescent light that does not require an additional lighting source or a more sensitive imaging sensor or a brighter detector optical system even if a target for fixing the line of sight is provided inside a fundus camera or a fluorescent fundus camera.
  • Fundus camera can be provided.
  • the target for fixing the internal sight of the present invention can be applied to both the bottom camera or the fluorescent fundus camera during Shandong or Musan.
  • FIG. 1 is a block diagram showing the basic configuration of a coaxial illumination fundus camera.
  • FIG. 2 is a configuration diagram of a fundus camera or a fluorescent fundus camera provided with a target for fixing an internal line of sight without an increase in the optical path of the present invention.
  • FIG. 3 is a block diagram showing the optical system of a target 23 for fixing the internal line of sight designed in front of the central add-on camera 212 of the masking unit 21.
  • FIG. 4 is a view showing the shape of the fixing unit 22 accommodating the standing and target adjustment lens 25 at one end of the masking unit 21 in the form of an aperture including the central aperture 212.
  • Fig. 5 is a result showing the retinal image (L,) of the target when simulated using the present invention.
  • 6 is a simulation result of a lighting axis generated using the masking unit 21.
  • FIG. 8 is a photograph showing the illumination axis of a fundus camera or a fluorescent fundus camera provided with a target for fixing an internal line of sight without an increase in the optical path of the present invention and the illumination source of the illumination unit 10 being illuminated by the objective lens 60 .
  • 10 is a lighting simulation between the pupil and the illumination lens 30 created by the central aperture 212 of the masking unit 21.
  • Figure 11 shows a target lens (25) and a target illumination lens (24) installed in the masking unit (21).
  • FIG. 12 is a view showing the installation and arrangement of the masking unit 21, the target adjustment lens 25, and the target illumination lens 24.
  • FIG. 13 is a side view of the optical system of the target 23 for fixing the inner line of sight designed in front of the central add-on aperture 212 of the masking unit 21.
  • Fig. 14 is for turning on the fundus camera lighting source of the present invention, and for fixing the internal line of sight
  • Fig. 15 is for turning off the fundus camera illumination source of the present invention, and for fixing the internal line of sight
  • Fig. 17 is another embodiment diagram illustrating a manual or automatic mechanism for adjusting the distance after combining the masking unit 21 and the fixing unit 22.
  • 2020/175972 1 (:1 ⁇ 1 ⁇ 2020/002965
  • Fig. 18 is a photograph showing a problem that occurs when the illumination axis does not match, and Fig. 18 (a photograph showing a problem that occurs when the blood detection axis does not match).
  • FIG. 19 is a fundus camera or a fluorescent fundus camera provided with a target for fixing an internal line of sight without an increase in the optical path of the present invention without a mirror 40.
  • FIG. 20 is a photograph showing an example when using the table (23) of 01 high school 1).
  • FIG. 22 is a flow chart showing a method of photographing a fundus using a fundus camera according to the present invention.
  • FIG. 23 is a photograph of the fundus taken when the infrared ray 1) is turned on (0) in FIG. 22.
  • FIG. 24 is a photograph of a fundus taken when 1 in white is turned on (0) in FIG. 22.
  • a fundus camera or a fluorescent fundus camera equipped with a target for fixing the internal vision without increasing the optical path is known for the macula when taking a fundus photo or a fluorescent fundus photo! And the fovea 6 can be accurately photographed or the desired peripheral area can be accurately photographed.
  • the present invention allows the light exiting from the illumination unit 10 to be evenly distributed over the retina. 2020/175972 1» (:1 ⁇ 1 ⁇ 2020/002965) Prevents vignetting ( ⁇ 3 ⁇ 4! Mountain 13 ⁇ 4) from dark outside and corners of the fundus image and color fundus image acquired by doing it.
  • a fundus camera or a fluorescent fundus camera equipped with an internal sight-fixing target without an increase in the optical path of the present invention includes an optical system for fixing the sight of a person, and a lighting part (10), a lighting lens (30), a beam splitter (50) and an objective lens (60) is further included.
  • Fig. 4 shows one end of the masking unit 21 and the fixing unit 22, One end of the masking unit 21 is provided so as to face the lighting part 10, and the other end is combined with the blood fixing unit 22 in FIG. 4.
  • the masking unit 21 is formed in a hollow circle shape. It is spaced apart from the structure 211 and the masking structure 211, and is placed in the center of the hollow inner part of the masking structure 211.
  • a central stopper (212) is provided, and the center of the central stopper (212) is provided in a hollow type, but the target hole (231) and the top to accommodate the target (23)
  • the target illumination lens (241) can be positioned behind the target (23).
  • the target lighting lens hole 241 of the concave shape to accommodate the target lighting lens 24 is provided.
  • the fixing unit 22 and the masking unit 21 are provided on both sides of the masking unit 21.
  • a distance adjustment hole (214 214 rain) is provided to combine.
  • the fixing unit 22 fixes the target adjustment lens 25 so that the target adjustment lens 25 can be arranged side by side behind the target illumination lens 24.
  • a target adjustment lens hole 251 is provided. More specifically, as shown in Fig. 4 (as shown in Bien), the fixing unit 22 is the masking structure 21 received in the center.
  • the target adjustment lens hole 251 is further provided in a concave shape to accommodate a part of the target illumination lens 24, and the target adjustment lens hole 251 is further provided in the center so that the target adjustment lens 25 can be fixed.
  • a fixing unit adjustment hole (224 224 224) is provided so that the 214 214 ratio and the butt distance adjustment screw can be combined.
  • the target illumination lens 24 is coupled to the masking unit 21, the
  • the target (23) above emits light to fix the human visual axis.
  • Point light sources such as 1 general visible light 0 (400 ⁇ 65011111) and 650 ⁇ 95011111 11 1 band) infrared light 1 ⁇ 1) can be generally used.
  • Transistor liquid crystal display (1 -1 ⁇ : 0), anisotropic conduction 2020/175972 1» (:1 ⁇ 1 ⁇ 2020/002965 film (show 7 ), organic light emitting diode (01 ⁇ 1)) and flat displays such as plasma displays can also be used.
  • the corresponding light source can transmit optical signals.
  • Optical fiber can also be used.
  • the target 23 coupled to the target hole 231 can have a small 1 high 1) and a two-dimensional display device such as 1 ⁇ 3 ⁇ 4 01 ⁇ 1) can be placed.
  • the above target hole is The size of (231) can be 500, and if the above table (23) is used as the above 1 ⁇ 1), 50 is preferable. In addition, the above table (23) is the same as the above 1 ⁇ ).
  • the target hole 231 can expand its size up to the size of the masking structure 211.
  • the target 23 is placed near the focal length of the target adjustment lens 25. Then, the light is collected and passed through the target illumination lens 24. After that, an image is formed on the retina through the illumination lens 30 and the objective lens 60. This light is the illumination axis of the fundus camera and the detector. Beam splitter (50) to separate the shaft or
  • Beam splitter (50) and mirror (40) can be passed.
  • the target illumination lens 24 is provided after the target 23 on the same axis as the target 23 and guides the light emitted from the target 23.
  • Myopia or farsightedness Accordingly, the position of the retina may vary from the objective lens 60 to its distance. Therefore, in order to apply the most vivid target (23) to the retina,
  • the target illumination lens 24 can be designed to be adjustable by moving it back and forth in the direction of the illumination axis. As shown in Fig. 11, this adjustment can be implemented by moving the screw thread forward and backward in a linear motor or rotating motor, or manually by an inspector. It can be designed to be adjusted back and forth.
  • the target illumination lens 24 can be tilted around the optical axis. It can also be designed to be adjustable with a rotating motor or manually.
  • the periphery of the retina can be irradiated.
  • the image of the target (23) deviating from the optical axis is formed on the periphery of the retina, and the target illumination lens (24). ) Can be rotated.
  • This method can be achieved by moving the position of the point-point light source to a point on a plane perpendicular to the optical axis. As shown in Fig.
  • the optical axis When the pixel corresponding to is lit, the light of the target 23 can be applied to the central fovea and the macula, and if the pixel corresponding to the peripheral part of the optical axis is lit, the light can be applied to the retina of the peripheral part by rotating the eyeball.
  • the target adjustment lens 25 is the same as the target 23 and the target illumination lens 24, as shown in FIG. 3
  • the target illumination lens 24 is arranged side by side on the axis and is configured so that the light drawn from the target illumination lens 25 is located within the focal length of the lens. That is, the target 23, the target illumination lens 24, and It is positioned side by side with the target adjustment lens 25 so that the target 23 is located between the central stop 212 and the target adjustment lens 25.
  • the focal length of the objective lens 60 is 25_
  • the focal length is 10111111 5111111
  • the target adjustment lens 25 having a diameter of 5111111
  • a spot of 40011111 is formed in the center of the retina (Fig. 5).
  • the target illumination lens 24 and the target adjustment lens are formed.
  • (25) can be composed of a single spherical lens, an aspherical lens and a color eraser lens, and can be composed of a combination of these.
  • the distance between the target illumination lens (24) and the target adjustment lens (25) is adjusted for patients with macular holes, macular degeneration, Stargart disease, and glaucoma patients with reduced central vision, and patients with aberrant color vision.
  • the spot size can be increased to 300011111.
  • the above spot is designed to reflect the whole and the center, which is the visual axis center of the fundus.
  • the fovea is a free vessel with a diameter of 40011111, which receives nutrition from the choroidal capillaries, and is anatomically composed of a concave gynecological fovea of 35011111. Therefore, in the case of the normal eye, the spot size is appropriate at the level of 40011111. If the spot size is too large, a lot of light flows into the fundus, and there is a disadvantage that can cause axis movement in the case of the low camera during scattering, and a disadvantage of inducing photophobia after inspection.
  • the spot of 40011111 is the size of a spot that is sufficient for central attention.
  • the spot size can be increased to 300011111, which corresponds to the range of the macula.
  • Fig. 20 is an example of a sculpture type 01 ⁇ 1), and Fig. 20 (the above target 23 is two-dimensional
  • the masking unit 21 from one side to the central portion of the cornea and lens 2020/175972 1»(:1/10 ⁇ 020/002965
  • the target adjustment lens 25 from the other side of the central stop 212 including a central stop 212 that prevents light from entering the illumination unit 10
  • the masking unit 21 is configured to evenly contrast the retina after being refracted by the human cornea and lens by allowing the light to not enter the central portion of the cornea and the lens, but enter the peripheral portion.
  • the masking unit 21 More specifically, as shown in FIG. 4, the masking unit 21
  • the masking structure 211 is provided in a hollow cylindrical shape in the form of an aperture, and the central part inside the masking structure 211
  • a shield 212 is provided and consists of a spider part 213 connecting the central part 212 and the masking structure 211.
  • the central stopper (212) is coaxial to minimize corneal reflection.
  • the minimum size of the central aperture 212 varies depending on the focal length of the objective lens 60 to be described below, but in general, it is preferable that the radius is 2.0 to 5.0 mm. If the radius of the central iris 212 is less than 2.0mm, there is a possibility that light may enter the central part of the cornea and lens, and if the radius of the central iris 212 exceeds 5.0mm, the light is evenly distributed to the periphery of the cornea and the lens. Since there is a possibility that the entrance may not be possible, it is advisable to carry out the above conditions.
  • the central additional shutter 212 can be attached to the front or rear surface of the diffusion lens 20 in a sticker manner, and the diffusion lens 20 can be applied with an oil or water pen. It can also be marked in the center.
  • the spider unit 213 can be designed in various ways on that day, and as the number increases, the stability increases, but there is a problem that the amount of light decreases and a diffraction image occurs.
  • Fig. 11 shows As shown, above
  • the present invention is composed of a lighting unit 10, a diffusion lens 20, a lighting lens 30, a beam splitter 50, and an objective lens 60 in the target optical system.
  • the illumination axis of the light extracted from the illumination unit 10 and the time axis of the light drawn from the target 23 and the detector axis of the light returning after imaging the fundus with the light drawn from the beam splitter 50 are the same It is preferred to be provided with a coaxial.
  • the lighting part 10 emits light.
  • the lighting part 10 is based on a xenon lamp or a light-emitting diode.
  • the lighting part 10 is the same as that used for conventional coaxial illumination, thus increasing compatibility. I can do it.
  • the lighting unit 10 may use a light-emitting diode of a visible wide band for photographing a fundus, and a light-emitting diode having an emission spectrum in the range of 700 to 1000 nm for photographing a near-infrared fundus. Also, 450 for photographing a fluorescent fundus. ⁇ 500nm 2020/175972 1»(:1/10 ⁇ 020/002965 All kinds of light-emitting diodes can be used, such as light-emitting diodes with emission lines in a narrow spectrum area of 700 80011111 in width.
  • the diffusion lens 20 diffuses the light received from the illumination unit 10. Since the light emitted from the diffusion lens 20 passes through the masking unit 21, the light can be controlled by the masking unit 21.
  • the illumination lens 30 is the target illumination lens 24 behind the
  • the light received from the lighting unit 10 is irradiated at a constant emission angle.
  • the light received from the diffusion lens 20 is more clearly and consistently extracted by the lighting lens 30.
  • the mirror 40 reflects the light received from the illumination lens 30.
  • the mirror 40 is a structure necessary to position the illumination on the east side of the camera, and has an effect on the optical performance of the fundus camera. Not crazy
  • the mirror 40 is not necessary.
  • the lighting unit 10 is more than one including visible light and near-infrared light
  • one beam splitter 50 and one beam splitter 50 instead of the mirror 40
  • two lights having different properties can be incident on the beam splitter 50.
  • the mirror 40 is the above
  • the direction of the incoming light from the illumination lens 30 is changed and the light is drawn out to the beam splitter 50.
  • the beam splitter 50 is provided on an axis parallel to the illumination lens 30
  • the beam splitter 50 includes the 942581
  • 99 9888841 Set the illumination axis of the light extracted from the illumination unit 10 and the detector axis of the light entering the detector.
  • the beam splitter 50 When the beam splitter 50 is used as a polarization beam splitter, I 5 polarized light is transmitted and 8 polarized light is reflected from the light received from the mirror 40. More specifically, all light sources are I 5 polarized light. A corresponding light source and a light source corresponding to 8 polarized light are mixed, and the light source passes the light corresponding to the I 5 polarized light by the polarization beam splitter 50, and the light corresponding to the 8 polarized light is bent by 90 degrees of the optical axis. On the other hand, a non-polarized beam splitter does not have the same principle as a polarized beam splitter.
  • the beam splitter 50 may be made of a very thin film material or a single square, rectangular or circular glass material, and a cube (0-no) polarizing beam splitter that combines two prisms can also be used. In particular, the two prisms are combined.
  • the objective lens 60 is on the same axis as the beam splitter 50
  • the fundus costume is enlarged after contrasting the fundus with the light received from the beam splitter 50.
  • Retinal image when a near-distance eyepiece is used between the teeth, the near-distance eyepiece reduces the image of the fundus enlarged by the objective lens 60, and the user checks the retinal image (b') of the above target.
  • Fig. 6 is a simulation of a lighting axis generated when the masking unit 21 is used
  • the masking unit 21 in the form of an aperture including the central aperture 212 shown in FIG. 4 forms a dark shade in the central section of the cornea and lens.
  • the ⁇ (: shown in Fig. 6 corresponds to the ⁇ (: graph of Fig. 7, respectively.
  • the dark shade is slightly in front of the cornea (show display portion in Fig. 6 and the red arrow from Fig. 7 to Fig. 6) It is formed to the posterior side of the asteroid.
  • the donut ring-shaped light is incident in front of the cornea and is 7.5111111 away from the lens.
  • Fig. 8 shows the illumination axis and the illumination unit 10 in the virtual objective lens 60 in the actually implemented fundus camera or fluorescent fundus camera. The projected appearance is shown.
  • FIG. 9 is a simulation example of the lighting unit 10 generated by the masking unit 21, and Fig. 9 shows a donut-shaped light generated by the masking unit 21 when there is no human eye. Although it diverges, FIG. 96 shows that when there is a human eye, it is refracted at the periphery of the cornea and the lens, and the light that has passed through the cornea and the lens is gathered to evenly contrast the retina.
  • FIG. 10 An example of a lighting simulation between the lighting lenses 30 is shown, and the figure is a simulation result showing the brightness by the lighting unit 10 between the masking unit 21 and the lighting lens 30 as an axis.
  • a bullet-shaped dark exercise ball is formed by the central aperture 212 of the masking unit 21, which is held up to the back surface of the illumination lens 30.
  • the pupil area is also shown.
  • the target optical system for fixing the inner line of sight can be designed within a yellow square area. In this case,
  • the target (23) can be applied to the fovea and the macula, which is the center of the fundus, without affecting the lighting part (10).
  • the designable size can be designed with a radius smaller than the inner diameter of the masking unit (21), and corresponds to the indication lighting. As the length of the optical path becomes longer, the optical diameter that can be designed is slightly smaller than the diameter of the central part of the masking unit 21 and the aperture 212. 2020/175972 1»(:1 ⁇ 1 ⁇ 2020/002965
  • FIG 11 is a photograph showing the masking unit 21, the target adjustment lens 25, and the target illumination lens 24 by implementing the target optical system of the present invention, and the target lighting lens 24 Is disposed in front of the target adjustment lens 25.
  • the target illumination lens 24 can be fixed with screws, as shown in the photo, but the target illumination lens 24 can be designed to move in the front and rear direction of the optical axis corresponding to the illumination axis of the fundus camera.
  • the method is the same as previously described, both manual and mechanical automatic methods are possible.
  • the typical optimal control range is the point at which the spot of the target (23) is formed in the patient's eye, which is the brightest and brightest, but in the fovea and macula.
  • 1) can be used for 1 high school 1 of all visible light bands and 1 ⁇ 1) of infrared rays up to the 85011111 band, which can only be detected by the human retina, and target (23) as a flat lighting source as well as such a point light source.
  • target (23) can be replaced by
  • FIG. 13 illustrates the target adjustment lens 25, target illumination lens 24, and target 23 designed in front of the masking unit 21 and the central blindfold of the masking unit 21, and the target ( 23) is inserted into the illumination axis of the ipsilateral fundus camera.
  • the left is a case where the fundus camera light is turned on (0 and the above target (23) is set to 0, and Figure 15 is a case where only the above target (23) is turned on (0).
  • the above target (23) can be turned off (0 mark), or the above mark (23) is continuously turned on (0 non-off (0 mark) and blinks).
  • the illumination unit 10 is turned on (0) to obtain a fundus photo.
  • the target (23) If it is used as a target (23), it can be lit at any time. On the other hand, if a lighting source other than the band emitting fluorescence is used as the target (23), as described above, the target (23) is turned off (0 Fluorescent fundus photo can be acquired by turning on (0) the illumination part 10 of the fluorescent fundus camera.
  • 16 shows an embodiment of a manual adjustment mechanism capable of adjusting the distance by combining the masking unit 21 and the fixing unit 22, the 2020/175972 1»(:1 ⁇ 1 ⁇ 2020/002965 Distance adjustment hole (214 214 non-overpass fixing unit adjustment hole (224 224 ratio) If the coupling screw that is joined together is first connected, the side of the fixing unit 22 is The user adjusts the distance of the fixing unit 22 through the fixing beam 222 coupled to the hole, that is, the fixing beam 222 is coupled to the fixing unit 22 and coupled to the fixing unit 22 The target adjustment lens (25) is moved and moves back and forth.
  • the target (23) illuminates the focal fovea at the optimal focal length, and the spot size is enlarged at the point away from the focal length, resulting in a wider macula than the focal focal length.
  • the fixing beam 222 connected to the fixing unit 22 coupled to the target adjustment lens 25 is pushed forward or inward from the outside of the fundus camera. It can be adjusted by pulling.
  • 17 shows another embodiment of a manual adjustment mechanism capable of adjusting the distance by combining the masking unit 21 and the fixing unit 22, the
  • the fixation beam 222 connected to the fixation unit 22 to which the target adjustment lens 25 is coupled is described above.
  • the distance between the target illumination lens 24 and the target adjustment lens 25 can be adjusted by rotating it outside the fundus camera.
  • the distance adjustment hole (214 214) and the fixing unit adjustment hole (224 224 ratio) As shown in Fig. 17, the masking unit 21 and the fixing unit 22 themselves are provided with female and male thread taps that can be coupled and disassembled by rotation. The distance between the illumination lens 24 and the target adjustment lens 25 can be adjusted.
  • the female and male thread taps can be manually adjusted through the fixing beam 222, but this rotational movement is precisely controlled by the motor. Automatic adjustment by controlling
  • the above function is performed by rotating or reverse rotation of the fixing unit (22) to the point that the size of the target (23) is minimized. This is possible.
  • Figure 18 is, unlike the present invention, when the illumination axis does not coincide, when excessive illumination is applied in one direction and the fundus image data is lost (FIG. 18 (shown in the figure, and the detector axis does not coincide (FIG. 18) (6)) Vignette in the corresponding direction is observed severely, and the image data is lost due to dark shooting.
  • the target mark (23) for fixing targets is prepared,
  • the axis of the detector, the axis of illumination, and the axis of view of the person coincide, so that the most vivid and evenly contrasted fundus picture can be obtained.
  • the illumination unit 10 By reflecting the light of the lighting unit 10, it is arranged to bend in the vertical direction, 2020/175972 1»(:1 ⁇ 1 ⁇ 2020/002965 Consists of an inverted type I. That is, the illumination unit 10, the diffusion lens 20, the masking unit 21, the fixing unit 22, the illumination lens ( When 30) is named as a lighting unit, the lighting unit is arranged to be perpendicular to the beam splitter 50.
  • the mirror 40 is present, it is configured in a straight line and the fundus camera
  • the mirror 40 has the advantage of being smaller in size and has the advantage of holding it like a pencil and taking a fundus picture.
  • the mirror 40 can be configured as an I type as shown in 19, and it is convenient to hold the lighting unit with your hand.
  • the target 23 is provided with the masking unit 21 between the diffusion lens 20 and the illumination lens 30.
  • Fig. 21 is an example of a fundus photograph taken using the target (22) as a two-dimensional target, and Fig. 21 (see the center of the seo, 21) is the inner side, and 21 (0 is the trauma side) , 21(1)) looked at the outer and lower sides to obtain a fundus picture.
  • 21(3 ⁇ 4) By combining the fundus photos taken by watching each side above, you can obtain a fundus picture with a very large angle of view, such as 21(3 ⁇ 4).
  • FIG. 1 A method of taking a fundus picture using a fundus camera or a fluorescent fundus camera equipped with a target for fixing the internal sight without increasing the optical path of the present invention is as shown in FIG.
  • the first step 10 turns on (0) the power of the fundus camera.
  • the target (23) or the display unit (display) of the fundus camera flashes and previews Enter the mode.
  • the second step 20) starts shooting.
  • the patient observes the blinking sight-fixing target (23), high school 1 ) , and the examination
  • the chair adjusts the distance between the fundus camera and the patient's eyes, and adjusts the angle of view for adjusting the direction of the fundus camera.
  • the examiner adjusts the focus and controls the exposure.
  • the infrared ray 1 high [) is turned on (0.
  • the infrared fundus photo data of 23 is acquired even when only the infrared ray 1 high 1) is turned on.
  • the infrared fundus photography is preferably desirable to take a maximum of 4 in section taken within at least 1 200, 1 loss.
  • the fourth step 40 all lights are turned off (0, so the pupil of the patient is maximized to maintain the maximum pupillary state.
  • the fourth step 40) is performed with a loss of 2001 to 5001.
  • the white one high [) is turned on (0.
  • the white one high 1) is turned on (0 ⁇ , as shown in Fig. 24, color fundus photo data is obtained). It is desirable to take a minimum of 4 to a maximum of 16 of the above color fundus photos, and it is desirable to take 2001 losses to 5001 ⁇ . 2020/175972 1»(:1 ⁇ 1 ⁇ 2020/002965
  • the sixth step (S60) all lights are secondarily turned off, the pupil of the patient is re-expanded, and the obtained fundus photo is displayed on the LCD display (display).
  • the third step (S30) an infrared fundus photograph is acquired, and then a color fundus photograph is obtained in the fifth step (S50).
  • a white LED is applied to obtain a fundus picture.
  • the visible light Even in the case of a camera during a mountain, the visible light itself causes discomfort in the glare, so before applying the visible light, check the angle of view and focus of the fundus in advance with infrared rays. Visible light is applied only immediately before the post-shooting.
  • the present invention uses the internal sight line fixing timetable (23).
  • the present invention uses the internal sight line fixing table (23) to determine the light path.
  • the target for fixing the line of sight (23) is designed inside a fundus camera or a fluorescent fundus camera, so that the target for fixing (23) is effectively formed on the retina of the shooting without deteriorating the performance of the entire optical system and is clear. And you can acquire evenly contrasted fundus photos and fluorescent fundus photos.
  • the object of the present invention is a target for fixing the line of sight (23)

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Abstract

La présente invention concerne une caméra de fond d'oeil ou une caméra de fond d'oeil à fluorescence pourvue d'une cible de fixation interne pour aligner l'axe visuel de l'oeil photographié avec l'axe d'un détecteur de la caméra de fond d'oeil ou de la caméra de fond d'oeil à fluorescence et à une caméra de fond d'oeil ou une caméra de fond d'oeil à fluorescence pourvue d'une cible de fixation interne sans trajet optique supplémentaire, la caméra de fond d'oeil ou la caméra de fond d'oeil à fluorescence étant prévue de façon à : au moment de la prise d'une photographie de fond d'oeil ou d'une photographie de fond d'oeil à fluorescence, permettre une photographie précise de la macula lutea et de la fovéa centralis et une photographie précise des zones environnantes concernées ; et ne pas générer de trajet optique supplémentaire et ne pas générer de diminution de la performance ou de changement de la taille de l'ensemble du système optique. La caméra de fond d'oeil ou la caméra de fond d'oeil à fluorescence pourvue d'une cible de fixation interne sans trajet optique supplémentaire, selon la présente invention, est un système optique ayant une cible visuelle pour une fixation visuelle pour fixer le regard d'une personne, le système optique de cible visuelle comprenant : une cible visuelle (23) qui émet de la lumière afin de fixer l'axe visuel d'une personne ; une lentille d'éclairage de cible visuelle (24) disposée derrière la cible visuelle (23) sur le même axe que la cible visuelle (23) et qui reçoit la lumière émise par la cible visuelle (23) ; et une lentille de commande de cible visuelle (25) qui est disposée de manière alignée derrière la lentille d'éclairage de cible visuelle (24) sur le même axe que la cible visuelle (23) et la lentille d'éclairage de cible visuelle (24) et est disposée de telle sorte que la lumière quittant la lentille de commande de cible visuelle (25) est positionnée à l'intérieur de la longueur focale de la lentille, les éléments inclus dans le système optique de cible visuelle étant : une unité d'éclairage (10) qui émet de la lumière ; une lentille d'éclairage (30) qui est disposée derrière la lentille d'éclairage de cible visuelle (24) sur le même axe que la lentille d'éclairage de cible visuelle (24) et émet, à un angle de sortie prédéterminé, la lumière qui a été reçue à partir de la cible visuelle (23) et une unité d'éclairage (10) ; un diviseur de faisceau (50) qui est disposé sur un axe parallèle à la lentille d'éclairage (30) et divise la lumière reçue en provenance de la lentille d'éclairage (30) ; et une lentille d'objectif (60) qui est disposée sur le même axe que le diviseur de faisceau (50) et agrandit une image du fond d'oeil renvoyée après l'éclairage du fond d'oeil avec la lumière reçue à partir du diviseur de faisceau (50).
PCT/KR2020/002965 2019-02-28 2020-03-02 Caméra de fond d'oeil ou caméra de fond d'oeil à fluorescence pourvue d'une cible de fixation interne sans trajet optique supplémentaire WO2020175972A1 (fr)

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KR1020190024189A KR102263378B1 (ko) 2019-02-28 2019-02-28 광로 증가가 없는 내부 시선고정용 시표가 마련된 안저카메라 또는 형광안저카메라
KR10-2019-0024189 2019-02-28

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013138962A (ja) * 2013-04-18 2013-07-18 Canon Inc 眼科装置
US20140002795A1 (en) * 2012-06-29 2014-01-02 Nidek Co., Ltd. Fundus photographing apparatus
JP6084284B2 (ja) * 2012-03-21 2017-02-22 オプトメッド オサケ ユキチュア 眼球を画像化するための装置及び方法
JP2018051036A (ja) * 2016-09-29 2018-04-05 株式会社ニデック 眼底撮影装置
KR20190005485A (ko) * 2017-07-07 2019-01-16 부산대학교병원 내부 반사를 효과적으로 억제하기 위한 편광 빔 스플리터와 선형 편광필터를 사용한 안저카메라

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100502560B1 (ko) 2002-07-25 2005-07-20 주식회사 솔루션닉스 광학식 마커를 이용한 3차원 측정 데이터 자동 정렬장치및 그 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6084284B2 (ja) * 2012-03-21 2017-02-22 オプトメッド オサケ ユキチュア 眼球を画像化するための装置及び方法
US20140002795A1 (en) * 2012-06-29 2014-01-02 Nidek Co., Ltd. Fundus photographing apparatus
JP2013138962A (ja) * 2013-04-18 2013-07-18 Canon Inc 眼科装置
JP2018051036A (ja) * 2016-09-29 2018-04-05 株式会社ニデック 眼底撮影装置
KR20190005485A (ko) * 2017-07-07 2019-01-16 부산대학교병원 내부 반사를 효과적으로 억제하기 위한 편광 빔 스플리터와 선형 편광필터를 사용한 안저카메라

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