JP2008011983A - Ophthalmologic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably acquire temperature information useful for diagnosing an optometry object eye. <P>SOLUTION: This ophthalmologic apparatus comprises an infrared imaging means 10 observing an infrared light from the optometry object eye, a visible-light imaging means disposed on a same optical axis to the optical axis of the infrared imaging means and observing a visible light or a light in an near-infrared region from the optometry object eye, alignment optical systems 26 and 24 projecting alignment lights to the optometry object eye, a focusing state detecting sensor 32 detecting a Z-directional focusing state between the optometry object eye and the infrared imaging means from the alignment light reflected from the optometry object eye, a movable mirror 20 selectively changing over between the infrared imaging state where the infrared light from the optometry eye enters in the infrared imaging means and a visible-light imaging state where the visible light or the light in the near-infrared region from the optometry eye enters in the visible light imaging means, and a fixation target 27 urging the fixation to an examinee. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an ophthalmic apparatus. Specifically, the present invention relates to an ophthalmologic apparatus that captures infrared rays from an eye to be examined by infrared imaging means and measures a temperature distribution of the eye to be examined.

In order to diagnose the subject's eye, an attempt has been made to measure the temperature distribution of the subject's eye by imaging infrared rays emitted from the subject's eye with an infrared camera (for example, Non-Patent Document 1). This document reports that an infrared camera was installed facing the eye to be examined, the eye to be examined was imaged by the infrared camera, and temperature analysis was performed from the captured image.
Hiramitsu Tadahisa, Majima Yoshinao, “Thermographical Research in Ophthalmology”, Eye-sight (March 1976), p. 33-38

  However, although there is a report that the eye is experimentally imaged with an infrared camera and the temperature analysis is performed as in the above-mentioned literature, an ophthalmologist that can stably acquire temperature information useful for diagnosing the eye to be examined The device has not been realized.

  An object of the present invention is to provide an ophthalmologic apparatus that can stably acquire temperature information useful for diagnosing an eye to be examined.

The ophthalmologic apparatus of the present invention includes an examination unit that is movable in the XYZ directions with respect to the eye to be examined, and observes the eye to be examined in a state where the examination unit is aligned with the eye to be examined. The inspection unit of the ophthalmologic apparatus is arranged on the same optical axis as the optical axis of the infrared imaging means and the infrared imaging means for observing infrared rays from the eye to be examined, and receives visible light or near-infrared light from the eye to be examined. Visible light imaging means for observation, alignment optical system for projecting alignment light onto the eye to be examined, and focus for detecting the focusing state in the Z direction between the eye to be examined and the infrared imaging means from the alignment light reflected from the eye to be examined Selectable between a state detection sensor, an infrared imaging state in which infrared rays from the subject's eye enter the infrared imaging means, and a visible light imaging state in which visible light or near-infrared light from the subject's eye enters the visible light imaging means And a movable mirror to be switched to. Further, a fixation target that prompts the subject to fixate is further provided outside the inspection unit or the inspection unit.
In this ophthalmologic apparatus, when examining the eye to be examined, first, the subject is made to fixate the fixation target. Next, the alignment light is projected onto the eye to be examined, and a reflected image of the alignment light from the eye to be examined is picked up by the visible light imaging means, and the examination part is aligned in the XYZ directions using the reflected image of the alignment light. When the examination part is aligned at a desired position with respect to the eye to be examined, the movable mirror is driven to guide the infrared ray emitted from the eye to the infrared imaging means, and the infrared imaging means observes the infrared image of the eye to be examined.
In this ophthalmologic apparatus, the subject's eye can be brought into a stable state (non-moving state) by causing the subject to fixate the fixation target. Also, in order to align the examination part in the XYZ directions while observing the eye to be examined with a visible light imaging means, temperature information of a desired position of the eye to be examined (for example, the central part of the eye or the peripheral part of the eye such as the conjunctiva) is acquired can do. Therefore, temperature information useful for diagnosing the eye to be examined can be stably acquired. In addition, since the infrared imaging means and the visible light imaging means are arranged on the same optical axis, accurate alignment between both imaging means and the eye to be examined can be realized.

Here, the infrared image (temperature information) obtained by the infrared imaging means changes depending on the angle of the subject. For example, when measuring the temperature of the cornea, since the shape of the cornea is a sphere, the infrared radiation angle differs between the center and the periphery of the cornea, and accurate temperature information cannot be obtained as it is. Therefore, in order to obtain accurate temperature information of the eye to be examined, it is preferable to correct the temperature information obtained by the infrared imaging means in accordance with the shape of the eye to be examined.
Therefore, in the above ophthalmologic apparatus, the examination unit further includes a kerato optical system for projecting kerato light onto the eye to be examined, and means for calculating the curvature radius of the eye to be examined from the reflected image of the kerato light picked up by the visible light imaging means And a correcting means for correcting the temperature distribution image of the eye to be inspected imaged by the infrared imaging means by using the calculated radius of curvature of the eye to be inspected.
This ophthalmologic apparatus includes a kerato optical system that projects kerato light onto the eye to be examined, calculates a curvature radius (shape) of the eye to be examined from a reflection image of the kerato light, and corrects temperature information based on the curvature radius. For this reason, accurate temperature information of the eye to be examined can be obtained.

Alternatively, in the above ophthalmologic apparatus, the examination unit further includes a multiple ring pattern illumination optical system that projects multiple ring pattern light onto the eye to be examined, and the eye to be inspected from the reflected image of the multiple ring pattern light captured by the visible light imaging unit. And a correcting means for correcting the temperature distribution image of the eye to be examined imaged by the infrared imaging means using the calculated curvature radius of the eye to be examined.
This ophthalmologic apparatus includes a multiple ring pattern illumination optical system that projects multiple ring pattern light onto the eye to be examined, calculates the curvature radius (shape) of the eye to be examined from the reflected image of the multiple ring pattern light, and calculates the temperature based on the curvature radius. Correct the information. Even with such an ophthalmic apparatus, accurate temperature information of the eye to be examined can be obtained.

  Furthermore, the ophthalmologic apparatus may further include a correcting unit that corrects the temperature distribution image of the eye to be examined, which is imaged by the infrared imaging unit, using the anatomical average shape of the eyeball. By utilizing the anatomical average shape of the eyeball, the temperature information imaged by the infrared imaging means can be easily corrected.

Further, in order to capture a precise infrared image by the infrared imaging means, it is necessary to reduce the depth of field. For this reason, the focus range is narrow, and the entire eye to be examined cannot be brought into focus.
Therefore, in the above ophthalmologic apparatus, the examination unit further includes a kerato optical system that projects kerato light onto the eye to be examined, and controls the drive source that moves the examination unit in the Z direction, the drive source, and the infrared imaging means. A controller for performing image processing on the temperature distribution image of the eye to be inspected imaged by the infrared imaging means, means for calculating the radius of curvature of the eye to be inspected from the reflected image of the kerato light imaged by the visible light imaging means, , Is further provided. The controller focuses the inspection unit on the eye to be inspected in the Z direction, and then images the eye to be inspected by the infrared imaging unit at a predetermined period while moving the inspection unit in the Z direction. ) Using the curvature radius of the eye to be examined calculated by the curvature radius calculating means, each of the good focus areas is extracted from the temperature distribution images of the plurality of eyes to be examined imaged by the infrared imaging means, and (2) the extracted temperature It is preferable to create a temperature distribution image of the eye to be examined by synthesizing the distribution images.
In this ophthalmologic apparatus, a temperature distribution image of the eye to be examined is acquired while moving the examination unit in the Z direction with respect to the eye to be examined. Then, a well-focused region is extracted from the acquired temperature distribution image, and the extracted regions are synthesized to obtain a temperature distribution of the eye to be examined. For this reason, the temperature distribution of the eye to be examined can be acquired more accurately.

  Alternatively, in the above ophthalmologic apparatus, the examination unit further includes a multiple ring pattern illumination optical system that projects multiple ring pattern light onto the eye to be examined, and a driving source that moves the examination unit in the Z direction; A controller that controls the infrared imaging means, an image processing device that performs image processing on the temperature distribution image of the eye to be examined imaged by the infrared imaging means, and a reflection image of the multiple ring pattern light imaged by the visible light imaging means, Means for calculating a radius of curvature. The controller focuses the inspection unit on the eye to be inspected in the Z direction, and then images the eye to be inspected by the infrared imaging unit at a predetermined period while moving the inspection unit in the Z direction. ) Using the curvature radius of the eye to be examined calculated by the curvature radius calculating means, each of the well-focused regions is extracted from the temperature distribution images of the plurality of eyes to be examined imaged by the infrared imaging means, and (2) the extracted temperature The temperature distribution image of the eye to be examined may be created by combining the distribution images.

  Further, the ophthalmologic apparatus performs image processing on a drive source that moves the examination unit in the Z direction, a controller that controls the drive source and the infrared imaging unit, and a temperature distribution image of the eye to be examined captured by the infrared imaging unit. And an image processing apparatus. The controller focuses the inspection unit on the eye to be inspected in the Z direction, and then images the eye to be inspected by the infrared imaging unit at a predetermined period while moving the inspection unit in the Z direction. ) Using the anatomical average shape of the eyeball, each of the well-focused regions is extracted from the temperature distribution images of the plurality of eyes to be examined imaged by the infrared imaging means, and (2) the extracted temperature distribution images are synthesized. A temperature distribution image of the eye to be examined may be created.

The main features of the techniques described in the following examples are listed.
(Embodiment 1) It has a temperature correction plate for correcting an infrared image (temperature distribution image) output from the infrared imaging means.
(Mode 2) By driving the movable mirror at a predetermined time interval, a visible light image and an infrared image of the eye to be inspected are captured at substantially the same timing. The memory stores the captured visible light image and the infrared image in association with each other.
(Mode 3) The visible light image and the infrared image of the eye to be examined are captured a plurality of times at predetermined time intervals after opening. A temperature change amount or a temperature change speed from a state immediately after opening is calculated from a plurality of captured infrared images.
(Form 4) The eyelash is specified from the visible light image of the eye to be examined. Recognize or exclude eyelashes as artifacts in the infrared image associated with the visible light image.
(Form 5) The eyelid is specified from the infrared image of the eye to be examined. The eyelid edge is recognized in the visible light image associated with the infrared image.
(Mode 6) An area is designated in a visible light image. In the infrared image associated with the visible light image, a temperature gradient in the designated area is calculated.
(Mode 7) An area having a large shape change is specified from the visible light image. The specific area is recognized in the infrared image associated with the visible light image.

  Hereinafter, an ophthalmologic apparatus according to an embodiment embodying the present invention will be described. The ophthalmologic apparatus according to the present embodiment includes a chin base on which the subject's head is fixed, an inspection unit 70 for observing and inspecting the subject's eye 100 fixed on the chin base, and the eye 100 to be examined. And a driving device 34 for moving the inspection unit 70.

  1 and 2 are schematic views showing the configuration of the optical system of the inspection unit 70. FIG. FIG. 1 shows a state when a visible light image is captured, and FIG. 2 shows a state when an infrared image is captured. As shown in FIGS. 1 and 2, the inspection unit 70 includes a kerato including a movable mirror 20, an alignment light source 26 disposed on the optical axis, and a plurality of point light sources disposed on the same circumference around the optical axis. It has a light source 28 and a visible light camera 12 and an infrared camera 10 arranged on the optical axis.

  The visible light camera 12 captures the light from the alignment light source 26 (reflection image of alignment light) and the light from the kerato light source 28 (reflection image of kerato light) reflected by the eye 100 to be examined. The visible light camera 12 of this embodiment uses a CCD camera in which a CCD element is arranged at each pixel position. The CCD element at each pixel position outputs an electrical signal corresponding to the intensity of the received light. The electrical signal output from each CCD element is converted into digital data, and the converted digital data group is output from the visible light camera 12.

The infrared camera 10 captures an infrared image emitted from the eye 100 to be examined. The infrared camera 10 of the present embodiment uses an infrared camera in which an infrared detection element (for example, a microbolometer) is disposed at each pixel position. The infrared detection element at each pixel position outputs an electrical signal corresponding to the intensity of incident infrared light. The electrical signals output from the infrared detection elements are converted into digital data, and the converted digital data group is output from the infrared camera 10.
The electric signal output from the infrared detection element differs depending on the temperature of the infrared detection element itself, the position where the infrared detection element is disposed, the shape of the measurement object, and the like. Therefore, in this embodiment, various corrections are performed on the digital data output from the infrared camera 10. This temperature correction will be described in detail later.

  The movable mirror 20 includes a reflecting surface 20a that reflects visible light and a rotating shaft 20c. The movable mirror 20 can be rotated around a rotation shaft 20c, and a motor 20b (shown in FIG. 4) is connected to one end of the rotation shaft 20c. When the motor 20b rotates, the rotating shaft 20c rotates and the movable mirror 20 also rotates. When the movable mirror 20 rotates, a first state in which visible light from the eye 100 is incident on the visible light camera 12 (state in FIG. 1) and a second state in which infrared light from the eye 100 is incident on the infrared camera 10 ( To the state of FIG.

A movable plate 18 is disposed between the movable mirror 20 and the infrared camera 10 (specifically, the infrared lens 14). A black body is applied to the back surface 18c (the surface on the infrared lens 14 side) of the movable plate 18. For this reason, stable infrared radiation is emitted from the back surface 18 c of the movable plate 18. In addition, a temperature sensor 18 a (shown in FIG. 4) is attached to the movable plate 18. The temperature sensor 18 a detects the temperature of the movable plate 18.
The movable plate 18 is a blocking position (a position shown in FIG. 1) that blocks the incidence of infrared rays from the eye 100 to the infrared camera 10, and an open position that allows the incidence of infrared rays from the eye 100 to the infrared camera 10 (see FIG. 1). (Positions 2 and 3). The movable plate 18 is moved by a motor 18b (shown in FIG. 4). When the movable plate 18 moves to the blocking position, a closed space is formed by the lens barrel (not shown), the movable plate 18 and the infrared camera 10. When the closed space is formed, the back surface 18c of the movable plate 18 faces the infrared camera 10, and infrared rays are prevented from entering the inside from the outside of the closed space. Therefore, in a state where the movable plate 18 is located at the blocking position, infrared rays radiated from each part in the closed space are incident on the infrared camera 10.

  The optical system of the inspection unit 70 includes a fixation target light source 27. The light from the fixation target light source 27 passes through a pinhole and a collimating lens 29 (not shown) to become a substantially parallel light beam, and is reflected by a half mirror 31 disposed between the alignment light source 26 and the half mirror 22. And enters the reflecting surface 20a of the movable mirror 20. The light of the fixation target light source 27 that has entered the reflecting surface 20 a is reflected by the reflecting surface 20 a and projected onto the eye 100 to be examined. By causing the subject to fixate the light of the fixation target light source 27, the eye 100 to be examined can be in a stable state (a state in which the eye 100 does not move).

In the inspection unit 70 described above, when the eye 100 and the inspection unit 70 are aligned (that is, when the light from the alignment light source 26 is projected onto the eye 100) or when a visible light image of the eye 100 is captured. For example (when projecting light from the kerato light source 28 onto the eye 100), the movable mirror 20 is in the first state. As shown in FIG. 1, in the first state, the reflecting surface 20a of the movable mirror 20 is disposed on the optical axis.
The light from the alignment light source 26 passes through a pinhole and a collimator lens 24 (not shown) to become a substantially parallel light beam, passes through the half mirrors 31 and 22, and enters the reflecting surface 20 a of the movable mirror 20. The alignment light incident on the reflecting surface 20 a is reflected by the reflecting surface 20 a and projected onto the eye 100 to be examined. Further, the light from the kerato light source 28 passes through a pinhole and a collimating lens (not shown) to become a substantially parallel light beam and is projected onto the eye 100 to be examined. An LED or the like can be used for the alignment light source 26, and an LED or the like can also be used for the kerato light source 28.

The light from the alignment light source 26 and the light from the kerato light source 28 reflected by the eye 100 are reflected by the reflecting surface 20 a of the movable mirror 20. The light reflected by the reflecting surface 20 a is further reflected by the half mirror 22, passes through the visible light lens 16, and is guided to the visible light camera 12. The visible light camera 12 captures light that has passed through the visible light lens 16 (that is, a reflected image of alignment light and a reflected image of kerato light).
The reflected image of the light from the alignment light source 26 projected onto the eye 100 is also received by the focus sensor 32. That is, the focus sensor 32 is disposed obliquely with respect to the optical axis. A reflection image of the light from the alignment light source 26 from the eye 100 is incident on the light receiving surface of the focus sensor 32 via the lens 30. The focus sensor 32 detects the alignment state between the inspection unit 70 and the eye 100 to be examined in the Z direction (that is, the direction in which the eye 100 to be examined and the inspection unit 70 are close to or away from each other).

  On the other hand, when capturing an infrared image of the eye 100, the movable mirror 20 and the movable plate 18 are in the state shown in FIG. In the state shown in FIG. 2, the reflecting surface 20 a of the movable mirror 20 is retracted from the optical axis and the movable plate 18 is disposed at the open position, and other than the infrared lens 14 is between the eye 100 and the infrared camera 10. Nothing is arranged. For this reason, the infrared rays emitted from the eye 100 are guided to the infrared camera 10 through the infrared lens 14 (germanium lens). The infrared camera 10 captures an incident infrared image.

  The drive device 34 that drives the inspection unit 70 includes a motor that drives the inspection unit 70 in the X direction (horizontal direction), a motor that drives the inspection unit 70 in the Y direction (vertical direction), and a Z direction (approaching and separating from the eye 100 to be examined). Motors that are driven in the direction of movement). When these motors are driven, the inspection unit 70 moves in the X direction, the Y direction, and the Z direction.

The configuration of the control system of the ophthalmologic apparatus described above will be described. FIG. 4 shows the configuration of the control system of the ophthalmic apparatus according to the present embodiment. As shown in FIG. 4, the ophthalmologic apparatus is controlled by the control device 40. As the control device 40, a microcomputer including a CPU, a ROM, a RAM, and the like can be used.
The control device 40 is connected to the infrared camera 10, visible light camera 12, continuous shooting switch 42, detailed shooting switch 44, temperature sensor 18 a, and focus sensor 32. The control device 40 includes an infrared image (a digital data group representing a temperature distribution) captured by the infrared camera 10 and a visible light image (a digital data group representing an intensity distribution of visible light) captured by the visible light camera 12. input. The control device 40 calculates the corneal shape of the eye 100 to be examined from the input visible light image, and performs various calculations such as correcting the temperature of the infrared image using the calculated corneal shape. The continuous photographing switch 42 and the detailed photographing switch 44 are operated by an inspector. When the continuous shooting switch 42 and the detailed shooting switch 44 are operated, signals from these switches 42 and 44 are input to the control device 40. When the continuous photographing switch 42 is operated, the control device 40 captures a visible light image and an infrared image of the eye 100 to be examined a predetermined number of times (for example, 10 times) at a predetermined time interval (for example, one second interval). In addition, when the detailed photographing switch 44 is operated, the control device 40 captures the visible light image and the infrared image of the eye 100 to be inspected a plurality of times while changing the position of the inspection unit 70 in the Z direction, and the plurality of infrared images thus captured. Are combined to create a precise infrared image. The processing of the control device 50 when the continuous shooting switch 42 and the detailed shooting switch 44 are operated will be described in detail later. Further, a signal from the temperature sensor 18 a and a signal from the focus sensor 32 are input to the control device 40. The control device 40 detects the temperature of the movable plate 18 based on the signal from the temperature sensor 18a, and detects the focus in the Z direction between the inspection unit 70 and the eye 100 to be examined based on the signal from the focus sensor 32. .
The controller 40 is connected to a drive device 34, motors 20b and 18b, an alignment light source 26, a kerato light source 28, and a fixation target light source 27. The control device 40 drives the drive device 34 to drive the examination unit 70 in the X, Y, and Z directions, and performs alignment with the eye 100 to be examined. Further, the control device 40 drives the motor 20b to switch the position of the movable mirror 20, and drives the motor 18b to switch the position of the movable plate 18. Further, the control device 40 switches ON / OFF of the alignment light source 26, the kerato light source 28 and the fixation target light source 27.
Further, a memory 37 and an image processing device 35 are connected to the control device 40. The control device 40 stores the infrared image output from the infrared camera 10 and the visible light image output from the visible light camera 12 in the memory 37, reads out these images from the memory 37, or reads these images. The image is output to the image processing device 35. The image processing device 35 processes the input image and displays it on the monitor 36.

(A) Operation at Operation of Continuous Shooting Switch Next, a procedure for inspecting the eye 100 using the above-described ophthalmologic apparatus will be described. First, the operation of the ophthalmologic apparatus when the continuous shooting switch 42 is operated will be described. FIG. 5 is a flowchart showing an operation procedure of the ophthalmologic apparatus when the continuous photographing switch is operated.
As illustrated in FIG. 5, when the continuous shooting switch 42 is operated (step S <b> 10), a signal from the continuous shooting switch 42 is input to the control device 40. When a signal from the continuous shooting switch 42 is input, the control device 40 places the movable mirror 20 in the first state and moves the movable plate 18 to the blocking position (the state shown in FIG. 1). Further, the control device 40 turns on the alignment light source 26 and the fixation target light source 27. When the fixation target light source 27 is turned on, the examiner urges the subject to open his eyes after blinking and to fixate the fixation target. A tear film is formed on the surface of the eye 100 by opening the eyelid after blinking the subject. Further, by causing the subject to fixate the fixation target, the eye 100 to be examined can be in a stable state (a state in which the eye 100 does not move), and imaging of the eye 100 can be performed well.
Next, the control device 40 moves the inspection unit 70 in the X, Y, and Z directions with respect to the eye 100 to perform alignment of the inspection unit 70 with respect to the eye 100 (step S12). Specifically, a reflected image of alignment light projected onto the eye 100 to be examined is captured by the visible light camera 12, and the position of the captured reflected image is positioned at a predetermined position (for example, the center) in the captured image. The inspection unit 70 is moved in the X and Y directions. Thereby, the alignment of the inspection unit 70 in the X and Y directions is completed. Further, the control device 40 determines whether or not the inspection unit 70 is focused in the Z direction from the output of the focus sensor 32 while moving the inspection unit 70 in the Z direction to the eye 100 to be inspected. When it is determined that the inspection unit 70 has focused in the Z direction, the driving of the driving device 34 is stopped. Thereby, the alignment of the inspection unit 70 in the Z direction is completed. When the alignment of the inspection unit 70 in the X, Y, and Z directions is completed, the control device 40 turns off the alignment light source 26.

When the alignment of the inspection unit 70 is completed, the control device 40 images the back surface 18c of the movable plate 18 with the infrared camera 10 (step S14). As already described, when the movable plate 18 is in the blocking position, the infrared camera 18 is positioned in the closed space, and the intrusion of infrared rays from the outside is blocked in the closed space. For this reason, the infrared image imaged in step S14 is obtained by imaging the infrared rays emitted from each part in the closed space. The infrared image captured in step S <b> 14 is stored in the memory 37. At the same time, the control device 40 stores the temperature detected by the temperature sensor 18a in the memory 37 in association with the infrared image. When the imaging of the infrared camera 10 in step S14 is finished, the movable plate 18 is moved to the open position.
Next, the control device 40 sets and starts a timer (step S16), and determines whether or not the timer has counted a predetermined time (for example, 1 second) (step S18). If the timer has not counted the predetermined time (NO in step S18), it waits until the timer counts the predetermined time.
On the other hand, when the timer counts the predetermined time (YES in step S18), the kerato light source 28 is turned on and the light from the kerato light source 28 is projected onto the eye 100 to be examined. At the same time, the control device 40 captures a reflection image of kerato light projected on the eye 100 to be examined by the visible light camera 12 (step S20). At this time, since the subject is fixing the fixation target, the eye 100 to be examined is in a stable state (a state in which the subject does not move), and a desired position of the eye to be examined can be imaged. The visible light image captured by the visible light camera 12 is stored in the memory 37.
When the visible light image is captured, the control device 40 places the movable mirror 20 in the second state (step S22). As a result, the optical system of the inspection unit 70 is in the state shown in FIG. 2, and the infrared rays from the eye 100 are guided to the infrared camera 10.
When the infrared rays from the eye 100 to be examined are guided to the infrared camera 10, the control device 40 images the infrared rays from the eye 100 with the infrared camera 10 (step S24). At this time, the fixation target cannot be seen from the subject, but the switching of the movable mirror 20 in step S22 and step S26 described below is performed continuously in a short time, so The fixation target always appears to be lit. For this reason, the eye 100 to be examined is in a stable state (a state in which it does not move), and a desired position of the eye to be examined can be imaged. The infrared image captured by the infrared camera 10 is stored in the memory 37 in association with the visible light image captured in step S20. Note that since the time (40 msec in this embodiment) from when the visible light image is captured in step S20 to when the infrared image is captured in step S24 is very short, the visible light image captured in step S20 and the step It can be considered that the infrared image captured in S24 is captured at substantially the same timing.
When an infrared image is captured in step S24, the control device 40 places the movable mirror 20 in the first state (step S26). Thereby, the optical system of the inspection unit 70 is in the state shown in FIG. 3, and the visible light from the eye 100 to be examined is guided to the visible light camera 12.

  Next, the control device 40 determines whether or not the visible light image and the infrared image of the eye 100 to be examined have been captured a predetermined number of times (for example, 10 times) (step S28). When the visible light image and the infrared image of the eye 100 to be examined are captured a predetermined number of times (YES in step S28), the process proceeds to step S30. On the other hand, when the visible light image and the infrared image of the eye 100 to be examined have not been captured a predetermined number of times (NO in step S28), the process returns to step S16 and the processes from step S16 are repeated. As a result, the visible light image and the infrared image of the eye 100 to be examined are imaged a predetermined number of times at a predetermined time interval (for example, at intervals of 1 second). Thus, the visible light image and the infrared image captured at the elapsed time are stored in the memory 37 in association with each elapsed time.

In step S <b> 30, the control device 40 calculates the corneal shape of the eye 100 from the visible light image stored in the memory 37. That is, each visible light image includes a reflection image of light from the kerato light source 28 (so-called kerato image). Therefore, the control device 40 first specifies an elliptical shape when the corneal shape is approximated by an ellipse from the position of the kerato image. Then, the corneal curvature radius and the direction of the strong main meridian and the weak main meridian are calculated from the identified elliptical shape. Since the procedure for calculating the corneal curvature radius and its direction from the kerato image is well known, detailed description thereof is omitted here.
Here, in order to more accurately calculate the corneal curvature radius of the eye 100 to be examined, a plurality of simulated eyes having a constant curvature are prepared, measurement is performed on these simulated eyes, and the measurement data is used as calibration data. You may make it utilize. For example, light from the kerato light source 28 is projected to a plurality of simulated eyes having a constant curvature (for example, simulated eyes having three curvatures of minimum, median, and maximum effective curvature radius) A reflected image (kerato image) is captured by the visible light camera 12 in advance. Next, the position of the kerato image in each captured visible light image is specified, and the specified position is recorded as calibration data. When the eye 100 is actually imaged, the position of the kerato image in the captured image is corrected with the stored calibration data, and the corneal shape of the eye 100 is calculated. Thereby, the cornea shape of the eye 100 to be examined can be calculated more accurately.

  Next, the control device 40 corrects the temperature of each infrared image stored in the memory 37 (specifically, data output from the infrared detection element at each pixel position of the infrared camera 10) (step S32). In the present embodiment, the data output from each infrared detection element of the infrared camera 10 includes (1) the temperature of the infrared detection element, (2) the position of the infrared detection element, and (3) the thermal radiation of the optical system of the infrared camera 10. (4) Correction is performed in consideration of the corneal shape of the eye 100 to be examined.

(1) Correction based on the temperature of the infrared camera 10 (infrared detection element) Data output from the infrared camera 10 varies depending on the temperature of the infrared camera 10 itself. That is, even if the subject has the same temperature, if the temperature (atmosphere temperature) of the infrared camera 10 changes, the data output from the infrared camera 10 also changes. Therefore, in order to eliminate the influence of the temperature of the infrared camera 10 itself, the data output from the infrared camera 10 is the data that would have been output if the infrared camera 10 had a predetermined temperature (for example, 25 degrees). Need to be converted (corrected) into Therefore, in this embodiment, the data output from the infrared camera 10 is corrected using the temperature detected by the temperature sensor 18a (the temperature of the movable plate 18) as the temperature of the infrared camera 10. The correction based on the temperature of the infrared camera 10 can be performed by a conventionally known method.

(2) Correction by the position of the infrared detection element of the infrared camera 10 The data output from each infrared detection element of the infrared camera 10 varies depending on the position of the infrared detection element. That is, even if the entire surface of the object facing the infrared camera 10 is flat and at the same temperature, if the position of the infrared detection element is different, the data output from the infrared detection element changes. Therefore, in order to eliminate the influence of the position of the infrared detection element, the data output from each infrared detection element is arranged at a predetermined position (for example, the pixel position at the center of the infrared camera). If so, it must be converted (corrected) into data that would have been output. Therefore, in this embodiment, the data output from each infrared detection element is corrected in consideration of the position of the infrared detection element. The temperature correction based on the position of the infrared detection element can be performed by a conventionally known method.

(3) Correction by thermal radiation of the optical system All materials having heat emit some infrared rays. Therefore, the infrared rays incident on the infrared camera 10 include not only the infrared rays emitted from the eye to be examined 100 but also the infrared rays emitted from each part of the optical system of the examination unit 70. For this reason, in order to detect only the infrared rays emitted from the eye 100, it is necessary to cancel the infrared rays emitted from each part of the optical system. Therefore, in this embodiment, the infrared image captured in step S14 (data output from each infrared element) is subtracted from each infrared image captured in step S22 (data output from each infrared element). This reduces the influence of infrared rays emitted from each part of the optical system.

(4) Correction based on the corneal curvature radius of the eye to be examined The temperature measured by the infrared camera 10 is affected by the angle of the subject with respect to the infrared camera 10 (that is, the infrared radiation angle from the subject). Since the eye 100 to be examined is a sphere, the infrared radiation angle from the eye 100 to be examined is different between the center and the periphery of the eye 100 to be examined. Therefore, based on the cornea shape of the eye 100 to be examined, data output from each infrared detection element of the infrared camera 10 is corrected.
Specifically, first, a plurality of simulated eyes having a black body surface with a uniform curvature radius are prepared, and these simulated eyes are imaged by the infrared camera 10 and data output from each infrared element is measured. For example, three kinds of simulated eyes having a minimum curvature radius, a simulated eye having a maximum curvature radius, and a simulated eye having an intermediate curvature radius are prepared, and measurement is performed on these simulated eyes.
Next, a function representing the relationship between the data output from each infrared detection element and the actual temperature of the subject (simulated eye) is obtained from the measured data using the angle of the normal vector of the simulated eye surface as a parameter. That is, when the radius of curvature is different, the normal vector of the simulated eye surface for each infrared detection element is different, and thereby the data output from the infrared detection element is also changed. Therefore, a displacement function representing the relationship between the temperature (data) output from the infrared element and the actual temperature of the simulated eye surface is acquired using the angle of the normal vector as a parameter. When the displacement function is acquired, a correction function obtained by inversely converting the displacement function is acquired. A correction function is acquired for each simulated eye. Each acquired correction function is stored in the memory 37.
For the actually measured infrared image, first, the angle of the normal vector is calculated from the corneal shape calculated in step S30. Next, using the calculated normal vector value, infrared image data, and each correction function stored in the memory 37, the correction data (correction temperature) of each pixel of the infrared image is calculated by performing interpolation calculation. To do.

The corrections (1) to (4) described above can be performed, for example, by the following procedure. That is, first, the data of the corresponding pixel of the infrared image captured in step S16 is subtracted from the data of each pixel of the infrared image captured in step S22 (correction (3) above). Next, the correction (2) is performed on the subtracted data, and then the correction (1) is performed. Finally, the correction (4) is performed to calculate the data of each pixel of the infrared image.
Note that the corrections (1) to (4) described above need not all be performed, and only corrections appropriately selected according to the properties of the measurement object, measurement accuracy, and the like may be performed. For example, when the influence of the optical system is small, only the corrections (1), (2), and (4) can be performed.

When the above-described temperature correction of the infrared image is completed, the control device 40 displays the infrared image corrected in step S32 and the visible light image captured in step S18 on the monitor 36 (step S34). That is, the control device 40 outputs these data to the image processing device 35. The image processing device 35 outputs the measurement result to the monitor 36 based on the data input from the control device 40.
Here, since the visible light image and the infrared image of the eye 100 to be examined are displayed on the monitor 36, the examiner can know which part of the eye 100 the temperature is displayed on. In addition, the monitor 36 displays infrared images (temperature distribution images) captured at intervals of 1 second after the eye 100 to be examined is opened. Therefore, it is possible to objectively grasp the temporal change of the tear film formed on the surface of the eye 100 from the temporal change of the temperature distribution image of the eye 100 to be examined. Thereby, it is possible to quantitatively evaluate the condition of the dry eye of the eye 100 to be examined.
The image processing device 35 analyzes the input visible light image and infrared image, and performs a process of calculating an index for objectively evaluating the state of the eye 100 to be examined. This process will be described in detail later.

(B) Operation when the detailed photographing switch is operated Next, the operation of the ophthalmologic apparatus when the detailed photographing switch 44 is operated will be described. First, the significance of the detailed photographing switch 44 will be described.
When imaging the eye 100 to be inspected with the infrared camera 10, it is preferable to open the aperture to make a bright optical system (for example, the brightness of the optical system is preferably about F1). If a bright optical system is used, the depth of field becomes shallow, and it becomes difficult to focus on the entire eye 100 to be examined. In particular, the eye 100 to be observed is a sphere, and since the eye 100 is close-up, it is difficult to focus on the entire eye. That is, when the focus is focused on the center of the eye 100, the peripheral portion is out of focus, and when the focus is focused on the peripheral portion, the center is out of focus. Therefore, in this embodiment, the detailed photographing switch 44 is provided for the purpose of obtaining an infrared image in which the entire eye to be examined 100 is in focus. Hereinafter, an operation of the ophthalmologic apparatus when the detailed photographing switch 44 is operated will be described.

FIG. 6 is a flowchart showing an operation procedure of the ophthalmologic apparatus when the detailed photographing switch is operated. As shown in FIG. 6, when the detailed photographing switch 42 is operated (step S36), the control device 40 places the movable mirror 20 in the first state and moves the movable plate 18 to the blocking position (shown in FIG. 1). State), the alignment light source 26 and the fixation target light source 27 are turned on.
Next, the control device 40 moves the inspection unit 70 in the X, Y, and Z directions with respect to the eye 100 to perform alignment of the inspection unit 70 with respect to the eye 100 (step S38). By step S38, the test | inspection part 70 will be in the state which focused on the center of the eye 100 to be examined.
When the alignment of the inspection unit 70 is completed, the control device 40 images the back surface 18c of the movable plate 18 with the infrared camera 10 (step S40), and moves the movable plate 18 to the open position. Next, the eye 100 is imaged by the visible light camera 12 (step S42). The images obtained in steps S40 and S42 are stored in the memory 37.
Next, the control device 40 places the movable mirror 20 in the second state (step S44), and images the infrared rays from the eye 100 to be examined by the infrared camera 10 (step S46). As a result, an infrared image focused on the center of the eye 100 is acquired. When the infrared image is captured, the control device 40 places the movable mirror 20 in the first state (step S48), and determines whether the infrared image has been captured a predetermined number of times (step S50).
If an infrared image of the eye 100 to be examined has been captured a predetermined number of times (YES in step S50), the process proceeds to step S52. On the other hand, when the infrared image of the eye 100 to be examined has not been taken a predetermined number of times (NO in step S50), the control device 40 moves the examination unit 70 by a predetermined amount in the direction approaching the eye 100 to be examined (step S56). . As a result, the periphery of the eye 100 to be examined is brought into focus. When the inspection unit 70 is moved by a predetermined amount, the control device 40 returns to step S42 and repeats the processing from step S42. Thereby, a plurality of infrared images of the eye 100 to be examined are acquired while changing the focus position from the center to the outside.

In step S52, first, the control device 40 outputs a plurality of captured infrared images to the image processing device 35. The image processing device 35 cuts out a well-focused area from each of the input infrared images, and synthesizes the cut-out areas to create one infrared image.
Specifically, in the captured infrared image, it is possible to calculate which region is in focus from the position of the inspection unit 70 when the infrared image is captured and the cornea shape of the eye 100 to be examined. . Therefore, the image processing apparatus 35 first calculates a focused area from each infrared image, and cuts out only the focused area. As the value of the corneal shape of the eye 100 to be examined, a value calculated from the position of the reflected image of kerato light can be used in the same manner as the operation of the continuous photographing switch 42 described above, or the anatomical average shape of the eyeball May be used.
When a focused area is cut out from each infrared image, the image processing device 35 performs magnification correction on each cut area according to the position of the inspection unit 70 when the area is imaged. That is, if the position of the inspection unit 70 when an infrared image is captured is different, the magnification of the captured image is also different. Therefore, the magnification of each infrared image is made the same by correcting the magnification of each cut area. When magnification correction is performed for each area, the areas are combined to create a single infrared image.
An example of image composition processing by the image processing device 35 will be described with reference to FIGS. FIG. 7 shows an infrared image before synthesis. Note that the eyelid edge 50, the kerato bright spot 52, and the like are not displayed in the infrared image, but are displayed in FIG. 7 for convenience of explanation (hereinafter, the same is also displayed in FIGS. 8 to 11).
First, the image processing device 35 cuts out a focused area 54 from the first infrared image captured (the infrared image shown in FIG. 8). Since the infrared image picked up first is in focus at the center of the eye 100 to be examined, the area to be cut out is also the center of the eye 100 to be examined. Since the eye 100 to be examined is a sphere, the focused area is circular.
Next, the image processing device 35 cuts out a focused area 56 from the second captured infrared image (the infrared image shown in FIG. 9), and similarly, the third captured infrared image (shown in FIG. 10). A focused region 58 is cut out from the infrared image. Since the infrared image is captured while moving the inspection unit 70 in the direction approaching the eye 100, the region 56 in which the second infrared image is in focus is the first captured infrared image (FIG. 8). It becomes a ring-shaped area positioned outside the in-focus area 54, and the in-focus area 58 of the third infrared image is an in-focus area 56 of the second imaged infrared image (FIG. 9). It is a ring-shaped region located outside the.
When the image processing device 35 cuts out the in-focus areas 54, 56, and 58 from each infrared image, the image processing device 35 corrects the magnifications and synthesizes the corrected images. The synthesized infrared image is shown in FIG. As shown in FIG. 11, the region 60 in which the synthesized infrared image is in focus is substantially the entire area of the eye 100 to be examined.

  After synthesizing each infrared image to create one infrared image, the image processing device 35 displays the synthesized infrared image on the monitor 36 (step S54). As a result, an in-focus infrared image is displayed on the monitor 36 over substantially the entire area of the eye 100 to be examined. The examiner can examine the entire eye 100 from the infrared image displayed on the monitor 36.

  Note that when the detailed photographing switch 44 is operated, various temperature corrections (correction in step S32 in FIG. 5) are performed on the captured infrared image, as in the case where the continuous photographing switch 42 is operated. You may do it.

(C) Others In the ophthalmologic apparatus of the present embodiment, both a visible light image and an infrared image of the eye 100 to be examined are captured, and various analyzes are performed on these images by the image processing apparatus 35. An example of image analysis processing performed by the image processing device 35 will be described with reference to FIG.
As shown in FIG. 12, the image processing device 35 first reads a visible light image and an infrared image from the memory 37 (step S58). Next, the image processing device 35 identifies the “eyelash” region from the read visible light image (step S60), identifies the “eyelash” region on the infrared image associated with the visible light image, The identified area is excluded or recognized as an artifact. That is, it is not possible to specify whether the eyelash is “eyelash” only by the infrared image, but “eyelash” can be specified because the “eyelash” is displayed as a black line in the visible light image. Therefore, by specifying the “eyelash” in the visible light image, the “eyelash” region in the infrared image can be excluded or recognized as an artifact.
Next, the image processing device 35 specifies the eyelid from the read visible light image (step S62). That is, when the eye 100 is inflamed, it is difficult to recognize the boundary between white eyes, black eyes, and eyelids from an infrared image. On the other hand, in a visible light image, the boundary between white eyes, black eyes, and eyelids can be separated regardless of the presence or absence of inflammation. Therefore, the eyelid edge can be specified from the read visible light image.
When the eyelash and eyelid edge are specified, the image processing device 35 recognizes the remaining area as the eyeball surface (step S64).

Next, the image processing device 35, for a plurality of infrared images obtained by operating the continuous shooting switch 42, the amount of change in output data for each infrared image (that is, the first captured infrared image) A temperature difference from the time of the first photographing is calculated (step S66). By calculating the amount of change in the output data of each pixel, it is possible to objectively evaluate the extent to which the tear film disappears from the surface of the eye 100 to be examined. This makes it possible to accurately diagnose whether or not it is dry eye.
Next, the image processing device 35 calculates the change rate (temperature change rate) of the output data of each pixel for a plurality of infrared images obtained by operating the continuous shooting switch 42 (step S68). Also by calculating the temperature change rate of each pixel, the rate at which the tear film disappears from the surface of the eye 100 to be examined can be objectively evaluated, and dry eye diagnosis can be performed accurately.

Next, the image processing device 35 determines whether or not a predetermined designated area exists in the captured infrared image (step S70). That is, the examiner may be able to determine from the visible light image of the subject eye 100 whether or not there is a scratch or the like on the eyeball surface of the subject eye 100. That is, if there is a region where the shape of the surface of the eye 100 to be examined is greatly changed, it can be determined that the region has a flaw. In such a case, the ophthalmologic apparatus according to the present embodiment enables the examiner to designate a damaged area on the visible light image. Therefore, in step S70, it is determined whether or not an area to be evaluated in detail is designated by the inspector.
If the designated area does not exist (NO in step S70), the process proceeds to step S74. If the designated area exists (YES in step S70), the image processing device 35 calculates a temperature gradient in the designated area (step S72). ). By calculating the temperature gradient, the degree of wound inflammation can be objectively evaluated. That is, if there is a wound or the like on the surface of the eyeball, the part of the wound becomes inflamed and the temperature may be different from the surrounding area. Therefore, by calculating the temperature gradient, it is possible to evaluate the degree of damage on the surface of the eyeball (degree of inflammation).
In step S74, the image processing apparatus 35 displays the result calculated in steps S66, 68, 72 on the monitor 36. The examiner can objectively evaluate the state of the eye 100 to be examined based on the values displayed on the monitor 36.

As is clear from the above description, the ophthalmic apparatus according to the present embodiment captures the visible light image and the infrared image of the eye 100 to be examined at substantially the same timing. Therefore, the infrared image can be analyzed using the information of the visible light image, and the visible light image can be analyzed using the information of the infrared image. Thereby, the state of the eye 100 to be examined can be objectively evaluated. For example, a lesion can be identified by finding a local temperature difference due to the lesion. Further, by comparing the infrared image before the start of treatment with the infrared image after the start of treatment, it is possible to evaluate the therapeutic effect and the like.
Further, when the continuous photographing switch 42 is operated, since infrared images of the eye 100 to be examined are continuously taken at a predetermined time interval, the temporal change of the tear film of the eye 100 to be examined can be objectively evaluated, and dry Diagnosis of eye etc. can be performed accurately.
Further, by operating the detailed photographing switch 44, it is possible to obtain an infrared image (temperature distribution image) focused on substantially the entire area of the eye 100 to be examined. For this reason, the whole eye 100 to be examined can be accurately diagnosed.

The preferred embodiments of the present invention have been described in detail above, but these are only examples, and the present invention can be implemented in various modifications and improvements based on the knowledge of those skilled in the art. it can.
For example, when the continuous shooting switch 42 is operated, as in the case of the detailed shooting switch 44, at each imaging timing (after 1 second, 2 seconds,... 10 seconds), the Z direction of the inspection unit 70 It is also possible to take a plurality of infrared images by changing the position of and to combine good focus areas in those infrared images.
In the above-described ophthalmologic apparatus, the control device 40 drives the examination unit 70 in the X, Y, and Z directions, calculates the corneal shape, and corrects the temperature of the infrared image, while the image processing device 35 performs a plurality of infrared images. From this, processing such as cutting out a good focus area and synthesizing them was performed. However, these processes can also be executed by a single processor or the like.
In addition, light in the near-infrared region can be used as light projected onto the eye 100 to calculate the corneal shape of the eye 100 to be examined. Further, the fixation target light source that prompts the subject to fixate may be arranged outside the inspection unit.
In the embodiment described above, the fixation target light source 27 is disposed in the inspection unit 70, but the fixation target light source can be disposed outside the inspection unit 70. By disposing the inspection unit 70 outside, it is possible to cause the subject to fixate the fixation target even when photographing with the infrared camera.

Further, the anatomical average shape of the eyeball can also be used as the corneal shape necessary for correcting the infrared image. For example, the value of the Gullstrand model eye can be used for the radius of curvature of the cornea.
Alternatively, the ring pattern light may be projected onto the eye to be examined, and the shape of the eyeball may be calculated from the reflected image of the projected ring pattern light. The ring pattern light projected onto the eye to be examined may be one or plural. FIG. 13 shows an example in which a plurality of ring pattern lights are projected. As shown in FIG. 13, the optical system of the inspection unit 70 is provided with a ring pattern light source 70 that projects a plurality of ring pattern lights onto the eye 100 to be examined, and an eye to be examined is analyzed by analyzing a reflection image of these ring pattern lights. 100 shapes are calculated. FIG. 14 schematically shows a visible light image captured when a plurality of ring pattern lights are projected onto the eye 100 to be examined. As is clear from FIG. 14, when a plurality of ring pattern lights are projected onto the eye 100 to be examined, the reflected images 62 of the ring pattern lights are projected onto a wide area of the eye 100 to be examined. Therefore, by calculating the radius of curvature of the eye 100 for each ring pattern, the radius of curvature at each part of the eye 100 is calculated, and the temperature correction of the infrared image can be performed more accurately.
Furthermore, the light pattern projected onto the eye to be examined is not limited to the ring pattern, and any type of pattern may be projected as long as the corneal shape can be calculated. For example, light of a grid pattern may be projected.

  It should be noted that the technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

It is a figure which shows schematic structure of the optical system of the test | inspection part of an ophthalmologic apparatus (a movable plate is a interruption | blocking position at the time of visible light image photography). It is a figure which shows schematic structure of the optical system of a test | inspection part (at the time of an infrared image photography). It is a figure which shows schematic structure of the optical system of a test | inspection part (a movable plate is an open position at the time of visible light image photography). It is a block diagram which shows the structure of the control system of an ophthalmologic apparatus. It is a flowchart for demonstrating operation | movement at the time of continuous imaging | photography switch operation. It is a flowchart for demonstrating operation | movement at the time of detailed imaging | photography switch operation. The figure for demonstrating the process which synthesize | combines the favorable focus area | region of an infrared image. The figure for demonstrating the process which synthesize | combines the favorable focus area | region of an infrared image. The figure for demonstrating the process which synthesize | combines the favorable focus area | region of an infrared image. The figure for demonstrating the process which synthesize | combines the favorable focus area | region of an infrared image. The figure for demonstrating the process which synthesize | combines the favorable focus area | region of an infrared image. It is a flowchart for demonstrating the process of an image processing apparatus. It is a figure which shows schematic structure of the optical system of the modification of the ophthalmologic apparatus of a present Example. It is a figure which shows typically the visible light image imaged with the ophthalmologic apparatus shown in FIG.

Explanation of symbols

10. Infrared camera 12 Visible light camera 18 Movable plate 20 Movable mirror 26 Alignment light source 27 Fixation target 32 Focus sensor 40 Control device 100 Eye to be examined

Claims (9)

An ophthalmologic apparatus that includes an examination unit provided to be movable in the XYZ directions with respect to the eye to be examined, and that observes the eye to be examined in a state where the examination unit is aligned with the eye to be examined
The inspection unit is
An infrared imaging means for observing infrared rays from the eye to be examined;
Visible light imaging means arranged on the same optical axis as the optical axis of the infrared imaging means, and observing visible light from the eye to be examined or light in the near infrared region,
An alignment optical system that projects alignment light onto the eye to be examined;
A focus state detection sensor for detecting a focus state in the Z direction between the eye to be examined and the infrared imaging means from alignment light reflected from the eye to be examined;
A movable mirror that selectively switches between an infrared imaging state in which infrared rays from the subject's eye enter the infrared imaging means and a visible light imaging state in which visible light or near-infrared light from the subject's eyes enters the visible light imaging means; , And
An ophthalmologic apparatus further comprising a fixation target for urging the subject to fixate on the inspection unit or outside the inspection unit. The inspection unit further includes a kerato optical system that projects kerato light onto the eye to be examined.
Means for calculating the radius of curvature of the eye to be examined from the reflected image of the kerato light imaged by the visible light imaging means, and the temperature distribution image of the eye to be inspected by the infrared imaging means using the calculated radius of curvature of the eye to be examined The ophthalmologic apparatus according to claim 1, further comprising correction means for correcting. A drive source that moves the examination unit in the Z direction, a controller that controls the drive source and infrared imaging means, and an image processing device that performs image processing on the temperature distribution image of the eye to be examined imaged by the infrared imaging means And
The controller, after focusing the examination part in the Z direction with respect to the eye to be examined, images the eye to be examined by the infrared imaging means at a predetermined period while moving the examination part in the Z direction,
The image processing apparatus extracts (1) a well-focused region from the temperature distribution images of a plurality of eyes to be examined, which are imaged by the infrared imaging means, using the curvature radius of the eyes to be examined calculated by the curvature radius calculating means. (2) The ophthalmic apparatus according to claim 2, wherein the extracted temperature distribution image is synthesized to create a temperature distribution image of the eye to be examined. The inspection unit further includes a multiple ring pattern illumination optical system that projects multiple ring pattern light onto the eye to be examined.
Means for calculating the curvature radius of the eye to be examined from the reflection image of the multiple ring pattern light imaged by the visible light imaging means, and the temperature of the eye to be imaged by the infrared imaging means using the calculated curvature radius of the eye to be examined The ophthalmologic apparatus according to claim 1, further comprising correction means for correcting the distribution image. A drive source that moves the examination unit in the Z direction, a controller that controls the drive source and infrared imaging means, and an image processing device that performs image processing on the temperature distribution image of the eye to be examined imaged by the infrared imaging means And
The controller, after focusing the examination part in the Z direction with respect to the eye to be examined, images the eye to be examined by the infrared imaging means at a predetermined period while moving the examination part in the Z direction,
The image processing apparatus extracts (1) a well-focused region from the temperature distribution images of a plurality of eyes to be examined, which are imaged by the infrared imaging means, using the curvature radius of the eyes to be examined calculated by the curvature radius calculating means. (2) The ophthalmic apparatus according to claim 4, wherein the temperature distribution image of the eye to be examined is created by synthesizing the extracted temperature distribution images.   2. The ophthalmologic apparatus according to claim 1, further comprising correction means for correcting the temperature distribution image of the eye to be examined imaged by the infrared imaging means using an anatomical average shape of the eyeball. A drive source that moves the examination unit in the Z direction, a controller that controls the drive source and infrared imaging means, and an image processing device that performs image processing on the temperature distribution image of the eye to be examined imaged by the infrared imaging means And
The controller, after focusing the examination part in the Z direction with respect to the eye to be examined, images the eye to be examined by the infrared imaging means at a predetermined period while moving the examination part in the Z direction,
The image processing apparatus (1) extracts good focus areas from the temperature distribution images of a plurality of eyes to be inspected by the infrared imaging means using the anatomical average shape of the eyeball, and (2) extracts The ophthalmic apparatus according to claim 1 or 6, wherein the temperature distribution image is synthesized to create a temperature distribution image of the eye to be examined. The inspection unit further includes a kerato optical system that projects kerato light onto the eye to be examined.
A drive source for moving the examination unit in the Z direction, a controller for controlling the drive source and infrared imaging means, an image processing device for image processing of a temperature distribution image of the eye to be examined imaged by the infrared imaging means, and visible light Means for calculating the radius of curvature of the eye to be examined from the reflection image of the kerato light imaged by the imaging means,
The controller, after focusing the examination part in the Z direction with respect to the eye to be examined, images the eye to be examined by the infrared imaging means at a predetermined period while moving the examination part in the Z direction,
The image processing apparatus (1) extracts a well-focused region from the temperature distribution images of a plurality of eyes to be examined, which are imaged by the infrared imaging means, using the curvature radius of the eyes to be examined calculated by the curvature radius calculating means. (2) The temperature distribution image of the eye to be examined is created by synthesizing the extracted temperature distribution images. The inspection unit further includes a multiple ring pattern illumination optical system that projects multiple ring pattern light onto the eye to be examined.
A drive source for moving the examination unit in the Z direction, a controller for controlling the drive source and infrared imaging means, an image processing device for image processing of a temperature distribution image of the eye to be examined imaged by the infrared imaging means, and visible light Means for calculating the radius of curvature of the eye to be examined from the reflected image of the multiple ring pattern light imaged by the imaging means,
The controller, after focusing the examination part in the Z direction with respect to the eye to be examined, images the eye to be examined by the infrared imaging means at a predetermined period while moving the examination part in the Z direction,
The image processing apparatus extracts (1) a well-focused region from the temperature distribution images of a plurality of eyes to be examined, which are imaged by the infrared imaging means, using the curvature radius of the eyes to be examined calculated by the curvature radius calculating means. (2) The temperature distribution image of the eye to be examined is created by synthesizing the extracted temperature distribution images.

Images