JP2013034754A - Ophthalmic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmic apparatus which effectively uses light in the vicinity of the optical axis of an illumination optical system that does not contribute to fundus illumination, and can control an emitted light quantity to be suitable for downsizing of the apparatus.SOLUTION: The ophthalmic apparatus includes: a light extraction section that extracts the light in the vicinity of the optical axis that does not contribute to fundus illumination among the light emitted from a light-emitting member; a light-guiding member that leads the light through the light extraction section in a direction that intersects with the optical axis and to a light quantity detection section in a condition that the intensity is attenuated, the light quantity detection section that detects the quantity of light of the light-emitting member through the light-guiding member; and a light emission control section that controls the light emission of the light-emitting member based on the output of the light quantity detection section.

Description

  The present invention relates to an ophthalmologic apparatus that performs examination (observation, imaging, measurement, etc.) of a subject's fundus such as a fundus camera or a fundus blood flow meter.

  The reflected light on the film on which the fundus reflection image of the eye to be examined is formed is detected by the light receiving sensor, and when the amount of the detected reflected light reaches the reference value, the emission of the imaging light source is stopped by stopping the emission of the imaging light source It is known to control the amount of light (Patent Document 1).

However, according to the configuration of Patent Document 1, since the reflected light from the film is received,
Since there is variation in fundus reflection of the eye to be examined, it has been difficult to accurately control the amount of light emitted from the light source. There is also a problem that the eye is excessively irradiated with light.

  On the other hand, it is known that a light emission detection unit is provided above the photographing light source, and it is determined whether or not the photographing light source emits light based on the output of the light emission detection unit (Patent Document 2).

JP-A-5-3856 JP 2006-271814 A

  When using a light source that emits strong light for fundus illumination and controlling the amount of emitted light, it is preferable if light in the vicinity of the optical axis that does not contribute to fundus illumination can be used. It is desirable to detect the light quantity by attenuating the intensity. For this reason, it is not suitable for downsizing of the apparatus to achieve attenuation by extending the optical path for detecting the light amount long in the optical axis direction.

  An object of the present invention is to provide an ophthalmologic apparatus capable of effectively using light in the vicinity of the optical axis of an illumination optical system that does not contribute to fundus illumination and controlling the amount of emitted light so as to be suitable for downsizing of the apparatus. is there.

  To achieve the above object, the present invention provides a light emitting member, an illumination optical system that illuminates the fundus of the eye to be examined by light emitted from the light emitting member, and illumination of the fundus of the eye to be examined among the light emitted from the light emitting member. A light extraction unit that extracts light in the vicinity of the optical axis of the illumination optical system that does not contribute to light, and a light guide that guides light through the light extraction unit in a direction intersecting the optical axis and in a state where the intensity is attenuated A light amount detection unit that detects a light amount of the light emitting member through the light guide member, and a light emission control unit that controls light emission of the light emitting member based on an output of the light amount detection unit. And

  According to the present invention, it is possible to effectively use light in the vicinity of the optical axis of the illumination optical system that does not contribute to fundus illumination, and to control the amount of emitted light so as to be suitable for downsizing of the apparatus.

1 is a schematic configuration diagram illustrating a fundus camera according to a first embodiment of the present invention. It is a detailed block diagram of the imaging light quantity detection system which concerns on 1st Embodiment. It is an electrical block diagram concerning the light source part of 1st Embodiment. It is a flowchart concerning the imaging | photography sequence of the fundus camera which concerns on 1st Embodiment. It is a schematic block diagram explaining the fundus camera which concerns on the 2nd Embodiment of this invention. It is a detailed block diagram of the imaging light quantity detection system which concerns on 2nd Embodiment. It is a schematic block diagram explaining the fundus camera which concerns on the 3rd Embodiment of this invention. It is a detailed block diagram of the imaging light quantity detection system which concerns on 3rd Embodiment. It is a schematic block diagram explaining the fundus camera which concerns on the 4th Embodiment of this invention. It is a detailed block diagram of the imaging light quantity detection system which concerns on 4th Embodiment. It is a schematic block diagram of the modification of an imaging | photography light quantity detection system.

<< First Embodiment >>
(Fundus camera)
A fundus camera according to a first embodiment of the present invention (an ophthalmologic apparatus for examining (observing and photographing) a fundus of a subject's eye) will be described with reference to FIGS. The fundus camera shown in FIG. 1 includes an imaging light source unit O1, an observation light source unit O2, an illumination optical system O3, an imaging / illumination optical system O4, an imaging optical system O5, and an internal fixation lamp unit O6. A light beam emitted from the imaging light source unit O1 or the observation light source unit O2 illuminates the fundus of the subject through the illumination optical system O3 and the imaging / illumination optical system O4 that illuminate the fundus of the subject, and the light reflected by the fundus is A fundus image is formed on the image sensor through the photographing / illumination optical system O4 and the photographing optical system O5. Here, the imaging light source unit O1 and the observation light source unit O2 have an optical axis that matches the optical axis of the illumination optical system O3.

  The imaging light source unit O1 generates white light ring illumination with the following configuration. Reference numeral 11 denotes a light amount detecting means, which is a sensor using known photoelectric conversion such as SPC (silicon photocell) or PD (photodiode). Reference numeral 101 denotes a light guide plate, which is a plate-like member whose rear surface is diffused and whose incident surface is transmitted. Reference numeral 12 denotes a mirror, which is composed of a glass plate on which aluminum or silver is deposited, an aluminum plate, or the like.

  Reference numeral 13 denotes a photographing light source (specifically, an Xe tube lamp). Xe is enclosed in a glass tube and a voltage is applied to emit light (having a light emitting point separated in a direction crossing the optical axis). Sometimes it is possible to obtain white light with sufficient intensity to record a fundus image. Reference numeral 14 denotes a photographing condenser lens, which is a general spherical lens. Reference numeral 15 denotes an imaging ring slit, which is a flat plate having an annular opening, and forms a ring-shaped illumination light beam passage area in the anterior eye portion of the eye to be examined. Here, the light in the vicinity of the optical axis emitted from the photographing light source 13 and reaching the photographing ring slit 15 is shielded by the central light-shielding portion of the photographing ring slit 15 and thus does not contribute to fundus illumination.

  Reference numeral 16 denotes a photographing lens baffle, which is also a flat plate having an annular opening, and its function will be described later. The luminous flux emitted from the imaging light source 13 is reflected by the mirror 12 in addition to the luminous flux directed toward the fundus, and becomes a luminous flux directed toward the fundus. For this reason, the amount of light emitted from the photographic light source 13 is smaller than that of the light source without the mirror 12. The mirror 12 is composed of a plane mirror, and even if there is a setting error with respect to the photographic light source, unevenness of light extracted for light emission control is less likely to occur, and compared with the setting for the photographic light source 13 when a spherical mirror is used. There are no distance restrictions.

  In the present embodiment, the mirror 12 is a plane mirror and the degree of freedom of setting for the imaging light source 13 is increased. However, a spherical mirror such as a concave mirror can be used instead of the plane mirror.

The light beam reflected by the mirror 12 is collected by the imaging condenser lens 14 and reaches the imaging ring slit 15 which is a ring slit member that forms a ring-shaped illumination light beam passage area in the anterior eye portion of the eye to be examined. The light-shielding area formed in the anterior ocular segment by the imaging ring slit 15 is
Even when the photographic lens baffle 16 is enlarged to the lens side and the fundus is photographed at a wide angle, it is possible to prevent unnecessary reflected light and scattered light from being mixed from the crystalline lens of the eye to the fundus photographing light. Further, a light-shielding region formed on the anterior eye portion of the eye by the imaging ring slit 15 is enlarged to the cornea side by a corneal baffle 25 described later, and even when photographing the fundus at a wide angle, from the cornea of the eye to be examined. It is possible to prevent mixing of unnecessary reflected light and scattered light.

  The observation light source unit O2 generates infrared ring illumination with the following configuration. Reference numeral 17 denotes an observation light source, which is a light source capable of continuous light emission, such as a halogen lamp or LED, and emits infrared light depending on the characteristics of the element and a filter. Reference numeral 18 denotes an observation condenser lens, which is a general spherical lens. Reference numeral 19 denotes an observation ring slit, which is a flat plate having an annular opening. Reference numeral 20 denotes an observation lens baffle, which is also a flat plate having an annular opening, and has the same function as the lens baffle 16.

  They differ only in the type of the light source from the photographing light source O1 and are condensed by the observation condenser lens 18, adjusted in the shape of the light flux at the anterior eye by the observation ring slit 19, and from the fundus by the observation lens baffle 20. This prevents unnecessary reflected light and scattered light from the crystalline lens from being photographed.

  The illumination optical system O3 relays the light beams generated by the photographing light source unit O1 and the observation light source unit O2, and creates an index image for focusing the fundus image. A dichroic mirror 21 transmits infrared light and reflects visible light. The visible light beam produced by the imaging light source unit O1 is reflected, and the infrared light beam produced by the observation light source unit O2 is transmitted and guided to the illumination optical system O3. Reference numeral 22 denotes the illumination relay lenses 1 and 24, and the illumination relay lens 2 forms an image of the ring slit members (16, 19) on the anterior eye part (for example, the pupil part) of the eye to be examined.

  Reference numeral 23 denotes a split unit for performing focusing. The split unit 23 includes a split LED 23a for projecting a focus index, a prism 23b for dividing a light source, and a focus index mask 23c indicating an outline of the focus index. Then, they enter the illumination optical system O3 during observation and move in the direction of the arrow in the figure to shift the focus index in the optical axis direction, and a forward / backward mechanism that retracts from the illumination optical system O3 during shooting. It is configured. M1 is a split shift drive motor, and S1 is a split position sensor, which shift-drives the split unit 23 to focus the focus index and detect its stop position.

  M2 is a split advance / retreat drive motor for advancing and retracting the split unit 23 with respect to the illumination optical system O3. The split advance / retreat drive motor M2 enters the illumination optical system O3 during fundus observation, projects a split index into the observation image, and retracts the split unit 23 from the illumination optical system O3 during photographing to focus on the captured image. It is controlled so that the index is not reflected. When the examiner operates the focus operation member 33, the stop position can be detected by the focus operation member position sensor S4. Note that a corneal baffle 25 provided on the eye side of the illumination optical system O3 prevents the reflected light and scattered light from the cornea of the eye to be examined, which are unnecessary for the fundus image, as described above.

  The imaging / observation optical system O4 projects an illumination light beam onto the fundus of the subject eye 28 and derives a subject eye fundus image. A perforated mirror 26 has a mirror at the outer periphery and a hole at the center. The light beam guided from the illumination optical system O3 is reflected by the mirror portion and illuminates the fundus of the eye to be examined through the objective lens 27. The illuminated fundus image of the object to be examined returns to the objective lens 27 and is led to the photographing optical system O5 through the hole at the center of the perforated mirror 26.

  The imaging optical system O5 focuses on the fundus image of the eye to be examined and forms an image on the image sensor. Reference numeral 29 denotes a focus lens, which is a lens for adjusting the focus of the photographic light beam that has passed through the center hole of the perforated mirror 26, and performs focus adjustment by moving in the direction of the arrow in the figure. M3 is a focus lens drive motor, and S3 is a focus lens position sensor. The focus lens 29 is driven to focus, and its stop position is detected. Reference numeral 31 denotes an image sensor that photoelectrically converts photographing light.

  The electrical signal obtained by the image sensor 31 is A / D converted by a processing circuit (not shown) to be digital data, displayed on a display (not shown) during infrared observation, and a recording medium (not shown) after photographing. To be recorded.

  The internal fixation lamp unit O6 has its optical path divided from the photographing optical system O5 by the half mirror 30, and the internal fixation lamp unit 32 faces the optical path. The internal fixation lamp unit 32 is composed of a plurality of LEDs, and lights the LED at the position corresponding to the fixation part selected by the examiner with the fixation lamp position specifying member 66. The examiner can obtain a fundus image in a desired direction by staring at the lighted LED of the subject.

(Shooting light quantity detection system)
FIG. 2 is a detailed configuration diagram of the photographing light quantity detection system according to the present embodiment. 2A is a plan view and FIG. 2B is a side view. The mirror 12 includes a reflecting surface 12a and a light transmitting portion 12b (specifically, a through hole, and the diameter of the hole becomes the aperture diameter). A light guide plate 101 as a light guide member is disposed on the rear side of the optical axis of the mirror 12. This light guide plate 101 has a structure using a milky white member so as to scatter the components that have passed through the light transmission part 12a in the light near the center of the optical axis inside (repeatedly scattered every time the light enters the inner wall surface), Alternatively, the structure has a minute reflection shape. The components scattered inside the light guide plate are emitted as stable surface emission, and the light amount is detected by the light amount detection means 11.

  FIG. 3 is an electric block diagram relating to the photographing unit of the fundus camera according to the present embodiment. In the fundus camera, the CPU 61 controls all the following operations. The photographing light source control circuit 62 as a light emission control unit charges energy for emitting light from the photographing light source 13 before photographing, discharges electric energy charged at the time of photographing, and causes the photographing light source 13 to emit light. The M1 drive circuit 63 drives the split shift drive motor M1 so that the split unit 23 moves to a position corresponding to the output of the focus operation member position sensor S4. The M2 drive circuit drives the split advance / retreat drive motor M2 so that the split unit 23 moves forward and backward with respect to the observation optical system O2 before and after photographing.

  Similar to the M2 drive circuit 64, the M3 drive circuit drives the focus lens drive motor M3 so that the focus lens 29 moves to a position corresponding to the output of the focus operation member position sensor S4. The power switch 67 is a switch for selecting the power state of the fundus camera, and the photographing switch 68 is a switch for performing photographing with the fundus camera.

(Shooting sequence)
FIG. 4 is a flowchart relating to the operation sequence of the light source unit according to the present embodiment. The photographing sequence of this fundus camera is shown below.
(S00) Shooting starts.
(S01) The observation light source 17 starts to emit light.
(S02) The split advance / retreat drive motor M2 is driven by the M2 drive circuit 64, and the split unit 23 enters the illumination optical system O3.
(S03) The split LED 23a is turned on.
(S04) A light emission amount suitable for photographing is calculated from an electrical signal obtained by the image sensor 31 from a fundus observation image obtained by the observation light source 17.
(S05) It is confirmed whether the photographing switch 68 is turned on. If turned on, the process proceeds to (S17). If not, the process proceeds to (S06).
(S06) The value of the focus operation member position sensor S4 is read.
(S07) The value of the split position sensor S1 is read.
(S08) It is confirmed whether the value of the split position sensor S1 is at a position corresponding to the value of the focus operation member position sensor S4. If it is, proceed to (S12). If not, the process proceeds to (S09).
(S09) The M1 drive circuit 63 drives the split shift drive motor M1.
(S10) It is confirmed again whether the value of the split position sensor S1 is at a position corresponding to the value of the focus operation member position sensor S4. If it is, proceed to (S11). If not, the process returns to (S09).
(S11) The split shift drive motor M1 is stopped by the M1 drive circuit 63.
(S12) The value of the focus lens position sensor S3 is read.
(S13) It is confirmed whether the value of the focus lens position sensor S3 is at a position corresponding to the value of the focus operation member position sensor S4. If so, return to (S04). If not, the process proceeds to (S14).
(S14) The focus lens drive motor M3 is driven by the M3 drive circuit 65.
(S15) It is confirmed again whether the value of the focus lens position sensor S3 is at a position corresponding to the value of the focus operation member position sensor S4. If it is, proceed to (S16). If not, the process returns to (S14).
(S16) The focus lens drive motor M3 is stopped by the M3 drive circuit 65.
(S17) The split LED 23a is turned off.
(S18) The light emission of the observation light source 17 is stopped.
(S19) The split advance / retreat drive motor M2 is driven by the M2 drive circuit 64, and the split unit 23 is retracted from the illumination optical system O3.
(S20) The image sensor 31 starts recording.
(S21) The photographing light source 13 starts to emit light by the photographing light source control circuit 62.
(S22) The light amount is detected by the light amount detection means 11.
(S23) It is confirmed whether the light quantity detected in (S22) has reached the light quantity calculated in (S04). If not, the process returns to (S22). If reached, the process proceeds to (S24).
(S24) The photographing light source control circuit 62 as the light emission control unit stops the light emission of the photographing light source 13.
(S25) The image sensor 31 ends the recording.
(S26) End of photographing.

  By adopting such a configuration, it is possible to realize a fundus camera that can detect the amount of light with stable light near the optical axis and has a high degree of freedom in arrangement of the light amount detection element. It becomes possible.

<< Second Embodiment >>
FIG. 5 is a schematic configuration diagram for explaining this embodiment in which a plane mirror as a reflecting member and a light guide portion as a light guide member are integrated, and the same reference numerals as those in FIG. 1 denote the first embodiment. It is the same as the component shown in. In many cases, the reflecting mirror is not a metal plate itself but a glass plate or plastic deposited with metal. Therefore, in the present embodiment, the use of the substrate itself on which metal deposition is performed as the light guide plate will be described with reference to FIGS.

  In the first embodiment, the mirror 12 and the light guide plate 11 that are configured in the imaging light source unit O1 are excluded from the configuration of the present embodiment. Instead of these, a metal deposition mirror 102 in which metal deposition is performed on a transparent or translucent substrate such as a glass plate or plastic is disposed. The luminous flux emitted from the imaging light source 13 is reflected by the metal deposition mirror 102 in addition to the luminous flux directed toward the fundus, and becomes a luminous flux directed toward the fundus.

  FIG. 6 is a detailed configuration diagram of the photographing light quantity detection system according to the present embodiment. 6A is a plan view and FIG. 6B is a side view. In FIG. 6, the same reference numerals as those in FIG. 2 are the same as the constituent elements shown in the first embodiment. The metal vapor deposition mirror 102 includes a metal vapor deposition film 102a, a light transmission part 102b (specifically, a through hole), and a light guide part 102c. The light guide unit 102c has a structure in which a milky white member is used for the substrate part or a rear part of the substrate so as to scatter inside the stable light near the center of the optical axis that has passed through the light transmission unit 102b. It has a structure with a minute reflection shape.

  The components scattered inside the light guide 102 c are emitted as stable surface emission, and the light amount is detected by the light amount detection means 11. In the first embodiment, the two components of the mirror 12 and the light guide plate 101 are used. However, by using the metal vapor deposition mirror 102 obtained by performing metal vapor deposition on the light guide member, the same configuration can be achieved with one integrated component. The fundus camera can be further miniaturized.

<< Third Embodiment >>
FIG. 7 is a schematic configuration diagram for explaining the present embodiment using a reflection mirror, and the same reference numerals as those in FIG. 1 are the same as the constituent elements shown in the first embodiment. In the first embodiment, the light guide plate 11 disposed in the photographing light source unit O1 is removed from the configuration of the present embodiment, and instead, the reflection mirror 103 (for example, a black paint or an ND filter is attached with a low reflectance). Mirror or prism).

  FIG. 8 is a detailed configuration diagram of the photographing light quantity detection system for explaining the present embodiment. 8A is a plan view and FIG. 8B is a side view. In FIG. 8, the same reference numerals as those in FIG. 2 are the same as the constituent elements shown in the first embodiment.

  A reflection mirror 103 is disposed on the optical axis behind the mirror 12 that is away from the eye to be examined. The reflecting mirror 103 attenuates the intensity of light in the vicinity of the optical axis that does not contribute to fundus illumination, in the direction intersecting the optical axis, and passing through the light transmitting portion 12a (specifically, the through hole). In this state, it functions as a light guide member that guides the light amount detection means 11.

<< Fourth Embodiment >>
FIG. 9 is a schematic configuration diagram for explaining the present embodiment using a bent light guide member, and the same reference numerals as those in FIG. 1 are the same as the constituent elements shown in the first embodiment. is there. In the first embodiment, the light guide plate 11 configured in the photographing light source unit O1 is removed from the configuration of the present embodiment, and instead, a light guide having a bent shape made of transparent or translucent plastic. 104 is arranged. Plastic has a high degree of freedom in shape, and there are materials that transmit light.Therefore, it can be used as a light guide with high degree of freedom in shape, and in this embodiment, the light guide member has a shape that is not a flat plate. Use plastic.

  FIG. 10 is a detailed configuration diagram of the photographing light quantity detection system according to the present embodiment. FIG. 10A is a plan view, and FIG. 10B is a side view. In FIG. 10, the same reference numerals as those in FIG. 2 are the same as the constituent elements shown in the first embodiment. The mirror 12 includes a reflection surface 12a and a light transmission portion 12b (specifically, a through hole). A light guide 104 is disposed on the rear side of the optical axis of the mirror 12. The light guide 104 has a structure using a milky white member or a minute reflection so that components extracted by the light transmission part 12a of the mirror 12 out of stable light near the center of the optical axis are scattered inside. It has a structure with a shape.

  The light repeatedly scattered inside the light guide 104 travels while being totally reflected from the side surface of the light guide 104, is emitted as stable surface light emission, and the light amount detection means 11 detects the light amount. As described above, in this embodiment, by bending the shape of the light guide member, it is possible to provide a degree of freedom in the arrangement of the light amount detection means, which is suitable for downsizing of the apparatus.

(Modification 1)
In the embodiment described above, the light extraction unit is a light transmission unit (specifically, a through hole) provided in the reflection member, but the present invention is not limited to this. That is, as shown in FIG. 11, the light extraction unit is a predetermined light reflecting member 103a (mirror or prism having a black coating or an ND filter) having a low reflectance provided on the light emitting member 13 side of the ring slit member 15. It may be a reflective region portion (effective reflective surface region) of area. In this case, the light reflecting member 103a also serves as a light guide member, and guides the light through the light extraction unit to the light amount detection unit 11 in a direction intersecting the optical axis and with the intensity attenuated.

  In this case, the mirror 12a may be a plane mirror, but a spherical mirror as shown in FIG. 11 can be used, and the central portion of the mirror 12a can be a light reflecting portion instead of the light transmitting portion as in the above-described embodiment. . In addition, the light transmission part like embodiment mentioned above is provided in the center part of the mirror 12a, and the light emission control is performed by using the light quantity detection via the light transmission part and the light quantity detection via the light reflecting member 103a shown in FIG. It can also be used.

(Modification 2)
In the above-described embodiment, the light transmitting unit 12b provided in the reflecting member is used as the light extracting unit that extracts light near the optical axis that does not contribute to fundus illumination among the light emitted from the light emitting member. It was a hole. However, the present invention is not limited to this, and the light transmitting portion may have a function of attenuating the intensity (specifically, a region having a low light transmittance).

(Modification 3)
In the above-described embodiment, the configuration including the reflecting member for directing the light traveling from the light emitting member in the direction away from the eye to be examined toward the eye to be examined is not limited thereto. It is good also as a structure which is not provided with the said reflection member.

(Modification 4)
In the above-described embodiment, the fundus reflection light is detected by the light amount detection unit in advance with the observation light source, and the light emission of the imaging light source is controlled based on the output of the light amount detection unit, but information on the fundus brightness is stored in advance. If so, the light emission of the photographing light source can be controlled based on the data. Similarly to controlling the light emission of the photographing light source, it is also possible to control the light emission of the observation light source (for example, a halogen lamp or LED) based on the brightness of the fundus.

(Modification 5)
In the embodiment described above, the fundus camera that observes the fundus of the subject to be examined and photographs the fundus of the subject to be examined has been described as the ophthalmologic apparatus, but the present invention is not limited to this. The present invention can also be applied to a fundus blood flow meter that measures the blood flow velocity by observing the fundus of the eye to be examined, irradiating a blood vessel portion of the fundus of the eye to be examined with a laser beam.

11 .. Light quantity detection means, 12 .. Mirror, 12 a .. Reflecting surface, 12 b .. Light transmission part, 13 .. Imaging light source, 15 .. Imaging ring slit, 62 .. Imaging light source control circuit, 101. Light plate

Claims (9)

A light emitting member;
An illumination optical system for illuminating the fundus of the eye to be examined with light emitted from the light emitting member;
A light extraction unit that extracts light in the vicinity of the optical axis of the illumination optical system that does not contribute to illumination of the fundus of the eye to be examined among the light emitted from the light emitting member;
A light guide member that guides light through the light extraction unit in a direction intersecting the optical axis and in a state where the intensity is attenuated;
A light amount detector for detecting the light amount of the light emitting member via the light guide member;
A light emission control unit that controls light emission of the light emitting member based on an output of the light amount detection unit;
An ophthalmologic apparatus comprising:   A reflection member is further provided for directing light that travels away from the subject's eye out of the light emitted from the light emitting member toward the subject's eye, and the light extraction unit is a light transmission unit provided in the reflection member The ophthalmic apparatus according to claim 1. It further comprises a ring slit member that forms a ring-shaped illumination light beam passage area in the anterior segment of the eye to be examined,
3. The ophthalmologic according to claim 2, wherein the light in the vicinity of the optical axis that does not contribute to fundus illumination extracted by the light extraction unit is light emitted from the light emitting member and reflected by the ring slit member. apparatus.   The ophthalmic apparatus according to claim 2, wherein the reflecting member is a plane mirror.   5. The ophthalmologic apparatus according to claim 1, wherein the light emitting member includes light emitting points separated in a direction intersecting the optical axis.   The said light extraction part is a reflective area | region part of the light reflection member provided in the said light emitting member side of the said ring slit member, Comprising: The said light reflection member serves as the said light guide member further, The light extraction member is characterized by the above-mentioned. An ophthalmic device according to claim 1.   The ophthalmologic apparatus according to claim 1, wherein the light guide member includes a reflective surface having a low reflectance.   The ophthalmologic according to any one of claims 1 to 6, wherein the light guide member is attenuated by being repeatedly scattered every time the light passing through the light extraction unit enters the inner wall surface. apparatus.   The ophthalmologic apparatus according to claim 2, wherein the reflection member and the light guide member are integrated.