JP7282566B2 - ophthalmic equipment - Google Patents

Description

The present invention relates to an ophthalmic device.

Currently, an apparatus using optical coherence tomography (OCT) using interference by low-coherence light (hereinafter referred to as an OCT apparatus) has been put into practical use. This makes it possible to obtain a high-resolution tomographic image of an object to be inspected in a non-invasive manner. Therefore, the OCT apparatus is becoming indispensable for obtaining a tomographic image of the fundus of the subject's eye, especially in the field of ophthalmology. In addition to the field of ophthalmology, attempts have been made to use an OCT apparatus for tomographic observation of the skin, and to use an OCT apparatus configured using an endoscope or catheter for wall tomographic imaging of the digestive and circulatory organs. there is

In an OCT apparatus in the field of ophthalmology, backscattered light from the subject's eye, which is low coherence light, and interference light with reference light are separated into frequency components by a diffraction grating and received by a light receiving element such as a line sensor. After that, by Fourier transforming the signal from the light-receiving element, information in the depth direction of the eye to be examined is acquired, and a retinal tomographic image is constructed. Since weak signals based on backscattered light from the subject's eye are imaged, it is necessary to accurately guide the interfering light to the light receiving element in order to generate an image with a high signal-to-noise ratio and high resolution.

On the other hand, since it is necessary to install a plurality of medical devices at medical sites, it is desired to make each device as small as possible. At this time, simply reducing the size of the OCT apparatus reduces the space in the housing of the apparatus, thereby shortening the distance between members. Therefore, the influence of the heat generated by the electric parts and the like on the optical system and the like (decrease in accuracy due to thermal expansion and thermal displacement) cannot be ignored. Therefore, Patent Literature 1 discloses an OCT apparatus in which a heat source is arranged above the optical system and an air cooling channel is formed so that air heated by the heat source does not conduct heat to the optical system.

JP 2018-015398 A

However, in the technique disclosed in Patent Document 1, the high heat source is arranged in the upper part of the device, and the inflowing outside air is passed through the inside of the device excluding the high heat source, then flows into the high heat source, and flows out of the device. . Therefore, the temperature of the air flowing into the high heat source is in a state of being warmer than the outside air, and it is not efficient for suppressing the temperature rise of the high heat source itself. In addition, since outside air flows throughout the apparatus, dust from the environment outside the apparatus moves throughout the apparatus, which may contaminate the optical members and lead to deterioration in optical performance.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an ophthalmic apparatus capable of efficiently suppressing an increase in the temperature of a high heat source and suppressing the influence of dust entering the apparatus from outside air on optical members. one.

An ophthalmologic apparatus according to an embodiment of the present invention comprises an optical head section including a heat source and an optical base, a heat source holding member that holds the heat source so as to be thermally separated from the optical base, an air inlet and an air outlet. a head outer cover that covers the heat source, the heat source holding member, and the optical base; to form a flow path toward the exhaust port.

An ophthalmologic apparatus according to one embodiment of the present invention comprises a heat source , an optical base including an optical system , a heat source holding member for holding the heat source so as to be thermally separated from the optical base, an intake port and an exhaust port. an optical head section including a head exterior cover having an opening and covering the heat source, the heat source holding member, and the optical base; and a first exhaust fan for discharging air in the head exterior cover to the outside; a second heat source that is different from the heat source; a base exterior cover that includes the second heat source and has an intake port and an exhaust port; and a second exhaust fan provided laterally of the base exterior cover. and a base portion including a base portion , wherein the air flowing into the optical head portion from the air intake port of the head exterior cover is discharged from the air exhaust port of the head exterior cover via the heat source by the first exhaust fan , and By the second exhaust fan, the air flowing into the base portion from the intake port of the base exterior cover is discharged from the exhaust port of the base exterior cover via the second heat source.

1 shows a schematic configuration of an OCT apparatus according to a first embodiment; 1 shows an example of the arrangement of an imaging optical system according to the first embodiment. FIG. 4 is a diagram for explaining air cooling channels of the OCT apparatus according to the first embodiment; 1 shows an example of the exterior of the OCT apparatus according to the first, second, third and fourth embodiments. FIG. 4 is a diagram for explaining air cooling channels around a scanner control unit according to the first embodiment; FIG. 5 is a diagram for explaining an air cooling channel of an OCT apparatus according to a second embodiment; FIG. 11 is a diagram for explaining air cooling channels of an OCT apparatus according to a third embodiment; FIG. 11 is a diagram for explaining air cooling channels of an OCT apparatus according to a fourth embodiment;

Exemplary embodiments for carrying out the present invention will now be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative positions of components, etc. described in the following embodiments are arbitrary and can be changed according to the configuration of the device to which the present invention is applied or various conditions. Also, the same reference numbers are used in the drawings to indicate identical or functionally similar elements. In the following, it should be noted that when air "passes" through a component, it does not necessarily mean that the air passes through, or "penetrates", the component, but rather that the air strikes, or "contacts", the component as shown in the drawings. ” shall also be included.

[First embodiment]
(Schematic configuration of the device)
An OCT apparatus, which is an example of an ophthalmologic apparatus according to the first embodiment, will be described below with reference to FIGS. First, a schematic configuration of an OCT apparatus according to this embodiment will be described with reference to FIG. FIG. 1 is a side view showing a schematic configuration of an OCT apparatus.

The OCT apparatus 1 is provided with an optical head section 10 , a stage section 20 , a base section 30 and a face receiving section 40 . A control unit 90 is also connected to the OCT apparatus 1 . The optical head unit 10 includes a measurement optical system for capturing fundus images and tomographic images. The optical head section 10 also includes a scanner control section 50 for controlling the scanner included in the measurement optical system. The scanner control unit 50 is a heat source with a particularly large amount of heat in the OCT apparatus 1 .

The stage section 20 can move the optical head section 10 in the xyz directions in the drawing with respect to the base section 30 using a motor (not shown). The stage unit 20 has a driving unit for horizontal movement (xz direction) on the lower side and a vertical movement (y direction) on the upper side. The base portion 30 is a base on which the optical head portion 10, the stage portion 20, and the face receiving portion 40 are provided, and houses electric components (not shown) such as a power source. The face receiving part 40 supports the subject's chin and forehead, thereby promoting fixation of the subject's eye (subject's eye) during examination.

The control unit 90 is connected to the OCT apparatus 1, the display unit 92, the input unit 93, and the like, and controls these. For example, the control unit 90 can configure a tomographic image based on the tomographic signal output from the optical head unit 10 . The control unit 90 may be configured using a general-purpose computer having a processor such as a CPU (Central Processing Unit), or may be configured as a dedicated computer for the OCT apparatus 1 . A storage unit 91 is provided in the control unit 90 . The storage unit 91 can store a program for capturing a tomographic image, and the like. The storage unit 91 can be configured with an arbitrary storage medium such as a hard disk.

The display unit 92 is composed of an arbitrary monitor, and can display various information such as patient information and tomographic images, an arbitrary user interface, and the like, based on signals sent from the control unit 90 . The input unit 93 is for giving instructions to the control unit 90, and is composed of, for example, a keyboard and a mouse.

Although the control unit 90 , the storage unit 91 , the display unit 92 and the input unit 93 are provided outside the OCT apparatus 1 here, they may be built in the OCT apparatus 1 . Alternatively, the display unit 92 may be a touch display or the like and function as the input unit 93 .

(Configuration of optical system)
Next, the configuration of the optical system in the OCT apparatus 1 will be described with reference to FIG. First, the optical system inside the optical head unit 10 will be described.

An objective lens 100 is installed facing an eye E to be inspected, which is an example of an object to be inspected, and a first dichroic mirror 101 is arranged on its optical axis. The optical path from the objective lens 100 is divided by the first dichroic mirror 101 into the measurement optical path L1 of the OCT optical system, the internal fixation lamp and the SLO optical system optical path L2, and the anterior segment observation optical path L3. It branches for each band. A second dichroic mirror 102 is arranged in the reflection direction of the first dichroic mirror 101 . The optical path in the reflection direction of the first dichroic mirror 101 is split by the second dichroic mirror 102 into the measurement optical path L1 of the OCT optical system and the internal fixation lamp and SLO optical system optical path L2 for each wavelength band of light rays. Here, SLO means a scanning ophthalmoscope (Scanning Laser Ophthalmoscope).

In the configuration according to the present embodiment, the transmission direction of the first dichroic mirror 101 is the anterior segment observation optical path L3, the reflection direction is the measurement optical path L1 of the OCT optical system, and the internal fixation lamp and SLO optical system optical path L2. An optical path is arranged. In addition, the measurement optical path L1 of the OCT optical system is arranged in the transmission direction of the second dichroic mirror 102, and the internal fixation lamp and SLO optical system optical path L2 are arranged in the reflection direction. However, the optical paths provided in the transmission direction and the reflection direction of each dichroic mirror may be opposite to each other.

The internal fixation lamp and the SLO optical system optical path L2 have a scanner, which is a scanning means to be described later, and have a configuration for obtaining a two-dimensional image of the fundus of the subject's eye E by scanning the fundus of the subject's eye E with illumination light. are doing. Further, the third dichroic mirror 109 splits the light into an SLO optical system optical path leading to the light source 110 and an internal fixation lamp optical path leading to the fixation lamp 111 for each wavelength band.

In the optical path L2 of the internal fixation lamp and SLO optical system, a lens 103, an X scanner 104, a Y scanner 105, a focusing lens 106, an optical path separation member 107, a lens 108, and a third dichroic mirror are arranged in order from the second dichroic mirror 102. 109 are arranged. A fixation lamp 111 is arranged in the transmission direction of the third dichroic mirror 109, and a light source 110 is arranged in the reflection direction. The light source 110 may be arranged in the transmission direction of the third dichroic mirror 109, and the fixation lamp 111 may be arranged in the reflection direction.

Light source 110 emits light with a wavelength of 780 nm. The fixation lamp 111 is used to prompt fixation of the subject's eye E in an arbitrary direction, and is composed of, for example, a laser or an LED (Light Emitting Diode) that emits light with a wavelength in the visible range. The focusing lens 106 is driven in the optical axis direction (the arrow direction in the drawing) by a motor (not shown) controlled by the control unit 90 to adjust the focus of the fixation lamp 111 and the light source 110 .

Also, the X scanner 104 and the Y scanner 105 are scanning means used for scanning the fundus of the eye E to be inspected with illumination light emitted from the light source 110 . The X scanner 104 is composed of a polygon mirror in order to scan the illumination light in the X direction at high speed. Y scanner 105 is composed of a galvanomirror. Note that the X scanner 104 may be composed of a resonance type mirror or a galvanomirror. The lens 103 is arranged with the vicinity of the central position of the X scanner 104 and the Y scanner 105 as the focal position.

The optical path separating member 107 is a prism in which a perforated mirror or a hollow mirror is vapor-deposited, and separates the illumination light from the light source 110 and the return light from the fundus. A lens 112 , a pinhole 113 and a single detector 114 are arranged on the optical path of the reflected light of the optical path separating member 107 . The pinhole 113 is arranged at a substantially conjugate position with the fundus of the eye to be examined E, and the fundus and the pinhole 113 constitute a confocal optical system.

The illumination light from the light source 110 that scans the fundus is scattered and reflected by the fundus or the anterior segment of the eye. Only necessary light of the scattered/reflected light is transmitted through the pinhole 113 and received by the single detector 114 . The single detector 114 is composed of an APD (avalanche photodiode). The control unit 90 can generate a fundus front image of the subject's eye E based on the signal output from the single detector 114 .

A lens 115 and a CCD 116 for anterior eye observation are arranged in order from the first dichroic mirror 101 on the anterior eye observation optical path L3. The CCD 116 has a sensitivity to the wavelength of illumination light for anterior eye observation (not shown), specifically around 970 nm. The control unit 90 can generate an anterior segment observed image of the subject's eye E based on the signal output from the CCD 116 .

The measurement optical path L1 has a configuration for capturing a tomographic image of the fundus of the eye E to be examined. More specifically, the measurement optical path L1 constitutes part of an optical system for irradiating the eye E to be examined with measurement light for OCT, which will be described later. A lens 117, a mirror 118, an OCTX scanner 119, an OCTY scanner 120, an OCT focusing lens 121, a lens 122, and a fiber end 123 are arranged in order from the second dichroic mirror 102 on the measurement optical path L1.

In this embodiment, the fiber end 123 is in an optically conjugate relationship with the fundus of the subject's eye E, and causes the measurement light to enter the measurement optical path L1. The OCT focusing lens 121 is driven in the optical axis direction (arrow direction in the figure) by a motor (not shown) controlled by the controller 90 in order to focus the measurement light on the fundus. Focusing is performed so that the light emitted from the fiber end 123 is imaged on the fundus.

An OCTX scanner 119 and an OCTY scanner 120, which are measuring light scanning means, are arranged to scan the fundus of the eye E to be inspected with the measuring light. An OCTX scanner 119 is used to scan the measurement light in the x direction, and an OCTY scanner 120 is used to scan the measurement light in the y direction. The OCTX scanner 119 and OCTY scanner 120 can be configured with galvo mirrors.

Next, the configurations of the optical path from the light source 124 to the fiber end 123, the reference optical system, and the spectroscope optical system will be described. The light source 124 is an SLD (Super Luminescent Diode), which is a typical low coherence light source. In this embodiment, an SLD with a central wavelength of 855 nm and a wavelength bandwidth of about 100 nm is used as the light source 124 . Here, the wavelength bandwidth is an important parameter because it affects the resolution of the obtained tomographic image in the optical axis direction. As for the type of light source, an SLD is selected here, but it is sufficient if it can emit low-coherence light. Near-infrared light can be used as the center wavelength in view of measuring the eye. Further, if the NA is the same, the central wavelength affects the lateral resolution of the obtained tomographic image, so the central wavelength can be made as short as possible. For both reasons, the center wavelength is set to 855 nm in this embodiment.

Light emitted from the light source 124 reaches the coupler 125 through the optical fiber 125-1. Single mode optical fibers 125 - 1 through 125 - 4 are connected to coupler 125 . Here, the light source 124, coupler 125 and optical fibers 125-1 to 125-4 constitute a coupler optical system 125-5.

Light emitted from the light source 124 is split into measurement light and reference light by the coupler 125. The measurement light passes through the optical fiber 125-2 to the measurement light path L1, and the reference light passes through the optical fiber 125-3 to the reference light. guided by the system. The output end of the optical fiber 125-2 is the fiber end 123 described above. The measurement light illuminates the fundus of the subject's eye E through the measurement optical path L1, and reaches the coupler 125 through the same optical path due to reflection and scattering by the retina.

On the other hand, the reference light split by the coupler 125 and guided by the optical fiber 125-3 is emitted to the reference optical system. The reference optical system includes a lens 126, a dispersion compensating glass 127, and a mirror 128 in this order from the output end of the optical fiber 125-3.

The reference light emitted from the output end of the optical fiber 125-3 reaches the mirror 128 via the lens 126 and the dispersion compensating glass 127 and is reflected. A dispersion compensating glass 127 is inserted in the optical path to match the dispersion of the measurement light and the reference light. The reference light reflected by mirror 128 returns along the same optical path and reaches coupler 125 . The mirror 128 is held by a motor and drive mechanism (not shown) controlled by the controller 90 so as to be adjustable in the direction of the optical axis indicated by the arrow in the figure.

The return light of the measurement light returned from the subject's eye E and the reference light reflected from the mirror 128 are combined by the coupler 125 to form interference light. Here, interference occurs when the optical path length of the return light and the optical path length of the reference light are substantially the same. Therefore, the mirror 128 can be moved in the optical axis direction by the driving mechanism described above, and the optical path length of the reference light can be matched with the optical path length of the measurement light, which varies depending on the eye E to be examined, to generate interference light. The interference light is guided to spectroscope 60 via optical fiber 125-4.

The spectroscope 60 constitutes a detection section that receives interference light. Lenses 129 and 131 , a diffraction grating 130 and a line sensor 132 are arranged in the spectroscope 60 . The interference light emitted from the optical fiber 125 - 4 becomes substantially parallel light through the lens 129 , is dispersed by the diffraction grating 130 , and is imaged on the line sensor 132 by the lens 131 .

Information about the luminance distribution in the interference signal acquired by the line sensor 132, which is a detector, is output to the control section 90 as an output signal. The controller 90 can generate a tomographic image based on the interference signal output from the line sensor 132 . That is, the control unit 90 constitutes an arithmetic processing unit that processes the output signal from the spectroscope 60 and obtains a tomographic image of the fundus of the eye E to be examined.

In this embodiment, a Michelson interferometer is configured by the measurement optical system, the reference optical system, and the spectroscope optical system, which are configured by the members arranged on the measurement optical path L1. Alternatively, a Mach-Zehnder interferometer may be used as the interferometer.

The control unit 90 controls the operation of the driving unit in the optical head unit 10 described above, the lighting control of the fixation lamp 111, the imaging operation of a tomographic image and the like, the image generation processing based on the intensity information acquired by the OCT apparatus 1, and the like. executed.

Here, the Y scanner 105 on the SLO optical system optical path L2 and the OCTX scanner 119 and OCTY scanner 120 on the measurement optical path L1 are controlled by the scanner controller 50. FIG. The scanner control unit 50 is an example of a galvanometer driver, and serves as a heat source that generates a lot of heat. Therefore, if the scanner control section 50 is arranged near the optical system, the optical system will be thermally affected. On the other hand, since the scanner control section 50 is connected to each scanner by a thick cable bundle, if the scanner control section 50 is provided outside the optical head section 10, it will be connected to each scanner by a thick drive cable bundle through the stage section 20. As a result, miniaturization of the OCT apparatus becomes difficult.

Therefore, in this embodiment, while the scanner control section 50 is provided in the optical head section 10, an air cooling flow path is formed to suppress the thermal influence of the scanner control section 50 on the optical system. A specific arrangement of the scanner control section 50 in the optical head section 10 will be described later in the section on the configuration of the flow path.

Note that the controller of the X scanner 104 on the SLO optical system optical path L2, which is composed of a polygon mirror or a resonant mirror, does not generate a lot of heat, so it can be provided separately from the scanner controller 50. FIG. However, the X scanner 104 may also be controlled by the scanner control unit 50 . In addition, when the X scanner 104 is composed of a galvanomirror, the X scanner 104 is also controlled by the scanner control unit 50 .

(Configuration of flow path)
Next, with reference to FIGS. 3A to 5, the configuration of the air-cooling channel according to the first embodiment will be described. First, holding of the scanner control unit 50 will be described with reference to FIGS. 3(a) and 3(b). 3(a) is a schematic side view of the OCT device 1, and FIG. 3(b) is a schematic cross-sectional view of the OCT device 1 along line 3B-3B shown in FIG. 3(a).

In the OCT apparatus 1 according to the present embodiment, the scanner control section 50, which is a heat source, is provided on the left side in the drawing inside the optical head section 10, as shown in FIG. 3(b). As shown in FIG. 3B, the optical head unit 10 includes a scanner control unit 50, a temperature sensor 51, a scanner control unit holding member 152, a support member 153, a fiber holding member 151, an optical base 150, a fan 154, and a , and a head exterior cover 155 are provided.

The optical base 150 is provided with the above-described OCT measurement optical system, reference optical system, anterior segment observation optical system, SLO optical system, and the like. there is The fiber holding member 151 holds the aforementioned coupler optical system 125-5 and is provided so as to abut on the right side surface of the optical base 150 in the drawing.

The scanner control section holding member 152 is an example of a heat source holding member, holds the scanner control section 50, and is provided with a gap from the left side surface of the optical base 150 in the drawing. The scanner control unit holding member 152 is held by the vertical driving unit of the stage unit 20 and the supporting member 153 connected to the fiber holding member 151 so as not to come into direct contact with the optical base 150 . Therefore, the scanner controller holding member 152 can thermally separate the scanner controller 50 from the optical base 150 . Note that the support member 153 may be configured as part of the scanner controller holding member 152 or may be configured as part of the fiber holding member 151 .

Fan 154 is an example of an exhaust fan. The fan 154 is held by a fan holding member (not shown) attached to the scanner control unit holding member 152, and sends air toward an opening 1551 such as a louver provided in the head outer cover 155, thereby blowing air into the optical head unit 10. of air can be facilitated. In addition, the opening 1551 can be provided in a portion corresponding to the front of the fan 154 . Also, the fan 154 and the fan holding member may be provided on the head exterior cover 155 . In this case, the fan 154 may be directly attached to the head exterior cover 155 without providing the fan holding member.

Fan 154 can be controlled by controller 90 to vary its output according to the temperature of scanner controller 50 . The control unit 90 can grasp the temperature of the scanner control unit 50 based on the output from the temperature sensor 51 (detection unit) provided in the scanner control unit 50 . For example, the control unit 90 increases the output of the fan 154 when the temperature of the scanner control unit 50 is 60° C. or higher, which is the first threshold value, and increases the output of the fan 154 when the temperature of the scanner control unit 50 becomes 58° C. or lower, which is the second threshold value. The output of the fan 154 can be lowered (returned to the original output). In the present embodiment, the respective thresholds for fan control are set to 60° C. and 58° C. based on the general limit temperature of the exterior temperature of the OCT apparatus 1. may be set. Further, in the present embodiment, the fan 154 is controlled by the control section 90, but another control section for controlling the fan 154 may be provided in the optical head section 10 or the like.

Next, with reference to FIG. 4, the inlet/outlet of the air cooling channel according to the present embodiment will be described. The head exterior cover 155 covers the optical base 150, the scanner control section 50, the scanner control section holding member 152, the support member 153, the fiber holding member 151, and the like. The stage exterior cover 156 covers the stage section 20, especially the horizontal movement driving section. Also, the base exterior cover 300 covers the base portion 30 .

When the optical head section 10 is moved up and down by the stage section 20, the head outer cover 155 moves up and down, but the stage outer cover 156 does not move up and down. Therefore, between the head outer cover 155 and the stage outer cover 156, a minute gap 1552 (opening) is provided around the entire circumference of the apparatus.

Further, as described above, in the optical head section 10, the fan 154 sends the air toward the opening 1551 of the head exterior cover 155, thereby facilitating exhaustion. At this time, outside air is sucked through the gap 1552 as the air inside the optical head section 10 is exhausted. Therefore, the gap 1552 serves as an inlet (inlet) of the air cooling channel, and the opening 1551 serves as an outlet (outlet) of the air channel.

Finally, with reference to FIG. 5, details of the configurations of the scanner control section 50 and the scanner control section holding member 152 will be described. The scanner control section 50 is composed of an electric board. The scanner controller holding member 152 holds the scanner controller 50 so that the scanner controller 50 is not perpendicular to the airflow of the air cooling passage. Further, the scanner controller holding member 152 forms a substantially vertical wall for restricting the flow of air, forming an air flow path. The inner wall of the head exterior cover 155 facing the scanner control section 50 and the scanner control section holding member 152 can also form part of the air flow path. In this case, an air flow path is formed between the head exterior cover 155 and the scanner control section holding member 152 .

In this embodiment, as shown in FIG. 5, the scanner control unit holding member 152 is formed in a substantially U-shape, that is, so as to have side walls on both sides. Therefore, the scanner control section holding member 152 can form an air flow path so that the air that has flowed into the optical head section 10 does not spread in the horizontal direction and efficiently flows upward. Also, a part of the wall for restricting the flow of air may be composed of a fan holding member (not shown). Furthermore, the shape of the scanner control unit holding member 152 is not limited to the substantially U-shape, and may be a shape without side walls. In this case, a substantially vertical partition wall or inner wall (not shown) provided in the head outer cover 155, which is substantially perpendicular to the scanner controller holding member 152, may constitute a wall for restricting the air flow. good.

The scanner control section holding member 152 is arranged so as to restrict the flow of air into the optical head section 10 toward the optical base 150 side. Therefore, the scanner controller holding member 152 can function as an example of a restricting member that restricts the air flowing into the optical head unit 10 from flowing toward the optical base.

The flow of air in the optical head unit 10 in the above configuration will be described below with reference to FIGS. 3A to 5 show, in addition to the above configuration, a flow path FL1-1 when outside air flows into the optical head section 10, a flow path FL1-2 in the optical head section 10, and the optical head section Flow paths FL1-3 are shown as they exit from 10. FIG.

First, outside air flows into the optical head section 10 through the gap 1552 between the head outer cover 155 and the stage outer cover 156, as indicated by the flow path FL1-1. The air that has flowed into the optical head section 10 is pulled by the exhaust air from the fan 154 and flows into the scanner control section 50 . The air that has flowed into the scanner control unit 50 is restricted in flow by the scanner control unit holding member 152 as indicated by flow path FL1-2, and flows into the optical base 150 behind the scanner control unit holding member 152. things are blocked. The air that has passed through the scanner control section 50 is sent by the fan 154 toward the opening 1551 of the head outer cover 155 and discharged out of the optical head section 10, as indicated by the flow path FL1-3.

As a result, the outside air flows into the scanner control section 50, which is a high heat source, without being heated by other heat sources, so that the high heat source can be cooled more efficiently. Furthermore, since the inflowing outside air does not pass through the optical base 150 including the optical members, dust from the outside environment is suppressed from flowing into the optical base 150, and the dust affects optical performance such as contamination of the optical members. can be reduced.

In addition, the gap 1552 is provided over the entire circumference of the OCT apparatus 1, more specifically, over the entire circumference of the optical head section 10, as described above. However, since air tends to flow in the shortest flow path, the air that flows into the optical head section 10 mainly flows through the gap 1552 on the side surface of the optical head section 10 where the opening 1551 is provided. . Therefore, the amount of air flowing in from the gap 1552 on the side surface of the optical head where the fiber holding member 151 is provided is very small, and the influence of such dust contained in the air on the optical performance can be ignored.

As described above, the OCT apparatus 1 according to this embodiment includes the optical head section 10 , the scanner control section holding member 152 and the head exterior cover 155 . The optical head section 10 includes a scanner control section 50 and an optical base 150 . The scanner controller holding member 152 holds the scanner controller 50 so as to be thermally separated from the optical base 150 . The head exterior cover 155 has a gap 1552 and an opening 1551 and covers the scanner control section 50 , the scanner control section holding member 152 and the optical base 150 . The scanner controller holding member 152 forms a flow path through which the air flowing into the optical head section 10 from the gap 1552 goes to the opening 1551 via the scanner controller 50 without passing through the optical base 150 . In particular, the scanner control section holding member 152 has a wall section that prevents the air flowing into the optical head section 10 from flowing into the optical base 150 .

With such a configuration, the OCT apparatus 1 can efficiently suppress the temperature rise of the high heat source. In addition, it is possible to minimize the influence on the optical members due to the inflow of dust from the outside air into the OCT apparatus 1 .

Furthermore, in this embodiment, a fiber holding member 151 for holding a coupler optical system 125-5 including optical fibers 125-1 to 125-4 is provided on the opposite side of the scanner control unit 50 with the optical base 150 interposed therebetween. Therefore, the air flowing through the flow path formed by the scanner controller holding member 152 does not flow into the coupler optical system 125-5, thereby suppressing thermal expansion of the optical fiber due to temperature rise.

The OCT apparatus 1 further includes a fan 154 provided near the opening 1551 and a temperature sensor 51 that detects the temperature of the scanner controller 50 . Fan 154 is controlled based on the detection result of temperature sensor 51 . Particularly in this embodiment, the output of the fan 154 is increased when the temperature of the scanner control section 50 becomes equal to or higher than the first threshold. Further, when the temperature of the scanner control unit 50 becomes equal to or lower than the second threshold, which is lower than the first threshold, the output of the fan 154 is lowered.

With such a configuration, the OCT apparatus 1 can efficiently flow air through the air-cooling channel. Also, by controlling the output of the fan 154 according to the temperature of the heat source, overheating of the OCT apparatus 1 can be suppressed. In addition, when the temperature of the heat source becomes equal to or lower than the second threshold, which is lower than the first threshold, the output of the fan 154 is lowered, thereby reducing the power consumption of the fan 154 and suppressing the noise caused by the fan 154. be able to.

In the present embodiment, the left side surface of the OCT apparatus 1 is the surface on which the scanner control unit 50, the scanner control unit holding member 152, the opening 1551, etc., which should configure the air cooling channel, are provided. However, the side is not limited to the left side. The surface on which the scanner control unit 50, the opening 1551, and the like are provided may be any one of the three sides without the face receiving portion 40, in other words, the three sides excluding the face receiving side. In this case, it is possible to prevent the air warmed by the scanner control unit 50 from directly hitting the subject, thereby preventing the subject from feeling uncomfortable.

Although the fan 154 is provided in this embodiment, the fan 154 may not necessarily be provided. Even if the fan 154 is not provided, the heat generated by the scanner control section 50 generates an ascending air current in the flow path FL1-2 in the optical head section 10. FIG. In addition, since air tends to flow in the shortest flow path, outside air that has flowed in along flow path FL1-1 flows through flow path FL1-2 via scanner control section 50 and then flows out along flow path FL1-3.

Therefore, even in this case, the outside air flows into the scanner control section 50, which is a high heat source, without being heated by other heat sources, so that the high heat source can be cooled more efficiently. Furthermore, since the inflowing outside air does not pass through the optical base 150 including the optical members, dust from the outside environment is suppressed from flowing into the optical base 150, and the dust affects optical performance such as contamination of the optical members. can be reduced.

[Second embodiment]
In some cases, the scanner control unit 50, which is a high heat source, has no choice but to use one that emits a strong radio wave. On the other hand, when an OCT apparatus is used as a medical device, radio wave radiation noise as the apparatus is legally restricted. On the other hand, as a method of reducing the radiated noise in the entire device while leaving the radiated noise from the elements as it is, an electromagnetic shield may be formed by sealing the elements with high radiated radio wave intensity with metal. However, if the scanner control unit 50 is completely sealed with metal, an air flow path like the air cooling flow path according to the first embodiment cannot be formed, and the high heat source cannot be air-cooled. .

Therefore, in the second embodiment, the OCT apparatus is configured so as to achieve both air cooling and radiation noise reduction. The configuration of the air cooling flow path according to this embodiment will be described below with reference to FIGS. 6(a) is a schematic side view of the OCT apparatus according to the present embodiment, and FIG. 6(b) is a schematic of the OCT apparatus according to the present embodiment taken along line 6B-6B shown in FIG. 6(a). It is a sectional view. The configuration of the OCT apparatus according to the present embodiment other than the scanner control unit holding member, the fan, and the scanner control cover is the same as the configuration of the OCT apparatus 1 according to the first embodiment, so the same reference numerals are used. , and description thereof is omitted.

In the OCT apparatus 2 according to the present embodiment, as shown in FIG. 6B, the scanner control section holding member 200 holds the scanner control section 50 and the scanner control section 50 as the optical base, as in the first embodiment. It is thermally separated from the platform 150 . Further, the OCT apparatus 2 according to the present embodiment is provided with a scanner control unit cover 201 (heat source cover) arranged so as to cover the scanner control unit 50 . By covering the scanner control unit 50, the scanner control unit cover 201 can form a wall for restricting the flow of air together with the scanner control unit holding member 200, thereby forming an air flow path.

In this embodiment, the material of the scanner controller holding member 200 is aluminum with a thickness of 2 mm, and the material of the scanner controller cover 201 is iron with a thickness of 1 mm. These materials are basically metal materials, and for example, iron with high magnetic permeability or aluminum with high conductivity can be used. Also, although a thicker plate is more effective in reducing radiation noise, it is possible to prevent the plate from being thicker than necessary from the viewpoint of downsizing. For example, considering a band of 1 GHz or less, which is important for medical equipment as a band of radiated radio wave noise, the plate thickness can be 0.1 mm or more for iron and 1 mm or more for aluminum.

The contact portion between the scanner control unit holding member 200 and the scanner control unit cover 201 may have no opening, but it is not appropriate to weld the entire surfaces in terms of ease of assembly and disassembly. Therefore, the scanner control section holding member 200 and the scanner control section cover 201 can be connected to each other by, for example, electrical continuity with a screw at a constant interval. In this case, for example, when the aforementioned band is targeted, the screw spacing can be 100 mm or less.

In the OCT apparatus 2 according to this embodiment, the fan 202 is held by the scanner controller cover 201 . The fan 202 is an example of an exhaust fan, and is arranged in front of the opening 1551 of the head exterior cover 155 as in the first embodiment. Note that the fan 202 may be provided on the head exterior cover 155 . Also, the control of the fan 202 may be performed in the same manner as the control of the fan 154 in the first embodiment.

The scanner control section cover 201 is provided with openings 2011 and 2012 such as louvers on the device side portion located in front of the fan 202 and on the bottom surface, respectively. Therefore, the air in the scanner controller cover 201 can be sucked and exhausted through these openings 2011 and 2012 . The diameter of the holes of the openings 2011 and 2012 of the scanner control unit cover 201 can be set to 10 mm or less per hole, for example, when the aforementioned band is targeted. Note that the inflow/outlet of the air cooling flow path to the optical head section 10 is the same as in the first embodiment, so the description is omitted.

The air flow in the optical head section 10 in the configuration of the OCT apparatus 2 according to this embodiment will be described below. First, as in the first embodiment, outside air flows into the optical head section 10 through the gap 1552 between the head outer cover 155 and the stage outer cover 156, as indicated by the flow path FL1-1. The air that has flowed into the optical head unit 10 is drawn by the exhaust air of the fan 202 and flows into the scanner control unit 50 through the opening 2012 on the bottom surface of the scanner control unit cover 201 .

The flow of the air that has flowed into the scanner control section 50 is restricted by the scanner control section holding member 200 and the scanner control section cover 201 as indicated by the flow path FL1-2. This prevents the air that has flowed into the scanner control section 50 from flowing into the optical base 150 behind the scanner control section holding member 200 . The air that has passed through the scanner control unit 50 is directed by the fan 202 to an opening 2011 on the side of the scanner control unit cover 201 and an opening 1551 provided in the head exterior cover 155, as indicated by flow paths FL1-3. It is directed and discharged out of the optical head section 10 .

Thereby, the radiation noise of the OCT apparatus 1 can be reduced while air cooling of the scanner control unit 50 is maintained. Furthermore, the scanner control unit holding member 200 and the scanner control unit cover 201 improve the function of restricting the flow of air around the scanner control unit 50 compared to the OCT apparatus 1 according to the first embodiment. For this reason, the inflow of outside air is further suppressed from flowing into the optical base 150 including the optical members, so that the dust from the outside environment is further suppressed from flowing into the optical base 150, and the optical members are prevented from entering the optical base 150. Dust effects on optical performance such as contamination can be further reduced.

As described above, the OCT apparatus 2 according to the present embodiment further includes the scanner control unit cover 201 that covers and substantially seals the scanner control unit 50. The scanner control unit cover 201 has an opening serving as an intake port on the lower side. 2012, and has an opening 2011 as an exhaust port on the side.

With such a configuration, the OCT apparatus 2 can efficiently suppress the temperature rise of the high heat source and reduce the radiation noise of the OCT apparatus 1 . In addition, it is possible to minimize the influence on the optical members due to the inflow of dust from the outside air into the OCT apparatus 1 .

It should be noted that the fan 202 may not be provided in the OCT apparatus 2 according to this embodiment, as in the first embodiment. Further, the surface on which the scanner control unit 50, the opening 1551, etc., which should configure the air cooling flow path, and the like are provided may be any one of the three side surfaces on which the face receiving unit 40 is not provided.

[Third embodiment]
In terms of potential sources of high heat, next to the scanner controller 50 is the line sensor 132 . In the case of the OCT apparatus 1 according to the first embodiment, the spectroscope 60 may be provided such that the line sensor 132 is arranged between the flow paths FL1-1 and FL1-2 near the scanner control unit 50. can. However, in order to further reduce the size of the optical head section 10, it is conceivable to provide the base section 30 with the spectroscope 60 that does not affect the polarization fluctuation among the optical systems. In this case, the scanner control section 50 and the line sensor 132, which are high heat sources, are arranged in the optical head section 10 and the base section 30, respectively.

Therefore, in the third embodiment, air cooling channels are configured in the base portion 30 without interfering with the channels configured in the optical head portion 10 . Hereinafter, the configuration of the air cooling flow path according to the present embodiment will be described with reference to FIGS. 4, 7(a) and 7(b). 7(a) is a schematic side view of the OCT apparatus according to the present embodiment, and FIG. 7(b) is a schematic of the OCT apparatus according to the present embodiment taken along line 7B-7B shown in FIG. 7(a). It is a sectional view. The configuration of the optical head unit in the OCT apparatus according to the present embodiment is the same as the configuration of the optical head unit 10 in the OCT apparatus 1 according to the second embodiment, so the same reference numerals are used and the description is omitted. omitted.

As shown in FIGS. 4, 7(a) and 7(b), a spectroscope 60, a base exterior cover 300, and a fan 301 are provided in the base section 30 according to this embodiment. The base exterior cover 300 covers the spectroscope 60 and the fan 301 as well as electrical components (not shown).

When the optical head section 10 is moved horizontally by the stage section 20, the stage outer cover 156 moves horizontally, but the base outer cover 300 does not move horizontally. Therefore, between the stage exterior cover 156 and the base exterior cover 300, a minute gap 302 is provided around the entire circumference of the apparatus. An opening 303 such as a louver is provided on the side surface of the base exterior cover 300 corresponding to the front of the fan 301 in the base portion 30 .

The fan 301 is an example of an exhaust fan, and is held inside the base portion 30 by a fan holding member (not shown). Note that the fan 301 may be provided on the base exterior cover 300 . Also, a temperature sensor may be provided in the base portion 30 and the fan 301 may be controlled based on the detection result of the temperature sensor, similar to the control of the fan 154 in the first embodiment. Note that the control unit for the fan 301 may be provided in the base unit 30 .

The air flow in the base portion 30 in the configuration of the OCT apparatus 3 according to this embodiment will be described below. First, outside air flows into the base portion 30 through the gap 302 between the stage exterior cover 156 and the base exterior cover 300, as indicated by the flow path FL3-1. The outside air that has flowed into the base portion 30 passes through the inside of the base portion 30, and then is sent by the fan 301 toward the opening 303 provided in the base exterior cover 300 as indicated by the flow path FL3-2, It is discharged outside the base portion 30 .

As described above, the OCT apparatus 3 further includes the line sensor 132 ( second heat source), which is a heat source different from the scanner control section 50 . The OCT apparatus 3 further includes a base portion 30 including a base exterior cover 300 having a gap 302 and an opening portion 303 which are intake ports, and a fan 301 provided laterally.

Accordingly, the air cooling flow path can be formed in the base portion 30 without affecting the air cooling of the optical head portion 10 . Therefore, the size of the apparatus can be reduced while air-cooling both the scanner control section 50 and the line sensor 132 .

Furthermore, in this embodiment, both the fans 202 and 301 provided in the optical head section 10 and the base section 30 are configured as exhaust fans. Therefore, compared to the case where the fan 301 is configured as an intake fan, dust from the environment outside the device or from the base section 30 is suppressed from moving through the inside of the base section 30, the stage section 20, and the optical head section 10. be. Therefore, it is possible to suppress dust from the environment outside the apparatus and from the base portion 30 from flowing into the optical base 150, and to reduce the influence of dust on optical performance such as contamination of optical members.

Note that the fan 202 may not be provided in the OCT apparatus 3 according to the present embodiment as well, as in the second embodiment. Further, the surface on which the openings 303 and the like constituting the air cooling flow path of the base portion 30 are provided may be any of the three side surfaces on which the face receiving portion 40 is not provided.

[Fourth embodiment]
With respect to potential sources of high heat within the optical head 10 , the light source 124 is second to the scanner controller 50 . In the OCT apparatuses according to the first to third embodiments, the light source 124 is held by the fiber holding member 151 as the coupler optical system 125-5. However, if the light source 124 is a high heat source, placing the heat source in the vicinity of the fiber may cause the fiber to move due to effects such as thermal expansion of the fiber, affecting the polarization of light passing through the fiber.

Therefore, in the fourth embodiment, an OCT apparatus capable of air-cooling the two high heat sources (the scanner control section 50 and the light source 124) in the optical head section 10 is constructed. The configuration of the air cooling flow path according to this embodiment will be described below with reference to FIGS. 8(a) and 8(b). FIG. 8(a) is a schematic side view of the OCT apparatus according to the present embodiment, and FIG. 8(b) is a schematic of the OCT apparatus according to the present embodiment taken along line 8B-8B shown in FIG. 8(a). It is a sectional view. The configuration of the OCT apparatus according to the present embodiment other than the supporting member, the head exterior cover, the fan, and the scanner control unit cover is the same as the configuration of the OCT apparatus 2 according to the second embodiment, and therefore the same reference numerals are used. is used to omit the description.

In the OCT apparatus 4 according to this embodiment, as shown in FIG. 8B, the support member 453 does not directly contact the optical base 150 with the light source 124 on the upper side of the optical head 10 (upper side of the device). Holds like Therefore, the support member 453 can thermally separate the light source 124 from the optical base 150 . Further, the support member 453 holds the scanner control unit holding member 200 so as not to directly contact the optical base 150 as well as the support member 153 in the second embodiment. can be spaced apart. Furthermore, the support member 453 itself is also provided on the fiber holding member 151 so as not to come into direct contact with the optical base 150 and is thermally separated from the optical base 150 . Note that the support member 453 may be configured as part of the scanner controller holding member 200 or may be configured as part of the fiber holding member 151 .

The head exterior cover 455 is similar to the head exterior cover 155 of the first embodiment, but in this embodiment, it is further provided with a wall portion 402 for restricting air flow. Note that the wall portion 402 can also be used as a shape for ensuring the strength of the head exterior cover 455 .

The scanner control section cover 401 is similar to the scanner control section cover 201 of the second embodiment, but is further provided with an opening 4013 on the top surface. The shape of opening 4013 may be similar to openings 2011 and 2012 .

In the OCT apparatus 4 according to this embodiment, the number of high heat sources in the optical head unit 10 has increased, so the fan 404 is configured with two fans. Fan 404 is held by scanner controller cover 401 . The fan 404 is an example of an exhaust fan, and is arranged in front of the openings 1551 and 2011 as in the second embodiment. Note that the fan 404 may be composed of one fan having a large displacement, or may be composed of three or more fans. Also, the arrangement of two or more fans is not limited to horizontal arrangement, and may be arbitrary arrangement such as vertical arrangement, oblique arrangement, or circular arrangement. Furthermore, the fan 404 may be provided on the head exterior cover 455 . Note that the control of the fan 404 may be performed in the same manner as the control of the fan 154 in the first embodiment.

The air flow in the optical head section 10 in the configuration of the OCT apparatus 4 according to this embodiment will be described below. The flow paths FL1-1, FL1-2, and FL1-3 are the same as the flow paths in the second embodiment, so description thereof will be omitted. First, outside air flows into the optical head section 10 from the gap 1552 between the head outer cover 455 and the stage outer cover 156 as indicated by the flow path FL4-1. The air that has flowed into the optical head section 10 is pulled by the exhaust air of the fan 404 and passes through the light source 124 at the top of the apparatus, as indicated by the flow path FL4-2, to cool the light source 124. FIG. The air passing through the light source 124 is restricted in the flow path by the wall 402 of the head exterior cover 455 as indicated by the flow path FL4-3, and does not flow into the optical base 150 and the coupler optical system 125-5. , flows into the scanner controller 50 through the opening 4013 .

The flow of the air that has flowed into the scanner control section 50 is restricted by the scanner control section holding member 200 and the scanner control section cover 401 as indicated by the flow path FL4-4. This prevents the air that has flowed into the scanner control section 50 from flowing into the optical base 150 behind the scanner control section holding member 200 . The air that has passed through the scanner control unit 50 is directed by the fan 404 to the opening 2011 on the side of the scanner control unit cover 401 and the opening 1551 provided in the head exterior cover 455, as indicated by the flow path FL4-4. It is directed and discharged out of the optical head section 10 .

As described above, the OCT apparatus 4 includes the light source 124 ( third heat source), which is a heat source different from the scanner control unit 50, and the support member 453 that holds the light source 124 so as to be thermally separated from the optical base 150. ( Third heat source holding member) is further provided. The OCT apparatus 4 further includes a scanner control unit cover 401 that covers and substantially seals the scanner control unit 50 . The scanner control unit cover 401 has an opening 2012 as an air inlet on the lower side, an opening 2011 as an air outlet on the side, and an opening 4013 as an air inlet on the upper side. Further, the head exterior cover 455 of the OCT apparatus 4 has a wall portion 402 that prevents air passing through the light source 124 from flowing into the optical base 150 . The support member 453 and the wall portion 402 form an air flow path to the opening portion 1551 of the head exterior cover 455 so that the air flowing into the optical head portion 10 does not pass through the optical base 150 but passes through the light source 124 . to form

As a result, air-cooling channels for the light source 124 can be formed while air-cooling the scanner control unit 50 is maintained.

In the first to fourth embodiments, a fiber optical system using a coupler is used as the splitting means in the optical system included in the optical head unit 10, but a spatial optical system using a collimator and a beam splitter may be used. . Also, the configuration of the optical system included in the optical head section 10 is not limited to the configuration described above, and part of the configuration included in the optical system may be configured separately from the optical head section 10 .

Furthermore, in the first to fourth embodiments, a spectral domain OCT (SD-OCT) apparatus using an SLD as a light source has been described as an OCT apparatus, but the configuration of the OCT apparatus according to the present invention is not limited to this. For example, the present invention can be applied to any other type of OCT apparatus such as a wavelength swept OCT (SS-OCT) apparatus using a wavelength swept light source capable of sweeping the wavelength of emitted light. For example, the OCT apparatus to which the present invention is applied includes a time domain OCT (TD-OCT) apparatus, an AO-OCT apparatus including an adaptive optics system, an OCTA apparatus for capturing blood vessel images, and a PS-OCT apparatus for measuring polarization changes. etc.

Further, the ophthalmologic apparatus to which the present invention is applied is not limited to the OCT apparatus, and may be a scanning type ophthalmologic apparatus having a scanning optical system. Therefore, for example, the present invention may be applied to any SLO device such as an AO-SLO device including adaptive optics.

Although the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments. Inventions modified within the scope of the present invention and inventions equivalent to the present invention are also included in the present invention. Moreover, each of the above-described embodiments can be appropriately combined within the scope of the present invention.

10: optical head unit, 50: scanner control unit (heat source), 150: optical base, 152: scanner control unit holding member (heat source holding member), 155: head exterior cover, 1551: opening (exhaust port), 1552 : Gap (air inlet)

Claims (15)

a heat source , an optical base including an optical system ,
a heat source holding member that holds the heat source so as to be thermally separated from the optical base;
a head exterior cover having an intake port and an exhaust port and covering the heat source, the heat source holding member, and the optical base;
a first exhaust fan that exhausts the air inside the head exterior cover to the outside;
an optical head including
a second heat source different from the heat source;
a base exterior cover containing the second heat source and having an air inlet and an air outlet;
a second exhaust fan provided in the lateral direction of the base exterior cover;
a base portion comprising
with
the air flowing into the optical head from the air intake port of the head exterior cover is discharged from the air exhaust port of the head exterior cover via the heat source by the first exhaust fan ;
The ophthalmologic apparatus according to claim 1, wherein the second exhaust fan exhausts the air flowing into the base portion from the air intake port of the base exterior cover through the second heat source and from the exhaust port of the base exterior cover. 2. The ophthalmologic apparatus according to claim 1 , wherein exhaust by said first exhaust fan is performed through a channel formed between said head exterior cover and said heat source holding member. a heat source , an optical base including an OCT measurement optical system ,
a heat source holding member that holds the heat source so as to be thermally separated from the optical base;
a head exterior cover having an intake port and an exhaust port and covering the heat source, the heat source holding member, and the optical base;
a first exhaust fan that exhausts the air inside the head exterior cover to the outside;
an optical head including
an OCT spectrometer, which is a second heat source different from the heat source;
a base exterior cover containing the OCT spectrometer and having an inlet and an outlet;
a second exhaust fan provided in the lateral direction of the base exterior cover;
a base portion comprising
with
A flow path is formed between the head exterior cover and the heat source holding member, through which the air that has flowed into the optical head portion flows to an exhaust port of the head exterior cover ,
An ophthalmologic apparatus, wherein a flow path is formed between the base exterior cover and the OCT spectrometer for the air that has flowed into the base portion to an exhaust port of the base exterior cover. The heat source holding member forms a flow path for the air flowing into the optical head from the air inlet of the head exterior cover to go to the air outlet of the head exterior cover via the heat source without passing through the optical base. 4. The ophthalmic device of any one of claims 1-3, wherein the ophthalmic device forms a The ophthalmologic apparatus according to any one of claims 1 to 4, wherein the heat source holding member is arranged to restrict air flowing into the optical head from flowing toward the optical base. The ophthalmologic apparatus according to any one of claims 1 to 5, wherein the heat source holding member has a wall portion that prevents air flowing into the optical head portion from flowing into the optical base. The ophthalmologic apparatus according to any one of claims 1 to 6, wherein the heat source holding member has a substantially U-shaped shape. The ophthalmic clinic according to any one of claims 1 to 7, wherein the heat source, the heat source holding member, and the exhaust port of the head exterior cover are provided in the lateral direction of the optical head portion excluding the face receiving side. Device. a third heat source different from the heat source;
a third heat source holding member that holds the third heat source so as to be thermally separated from the optical base;
further comprising
The ophthalmologic apparatus according to any one of claims 1 to 8 , wherein the head exterior cover has a wall portion that prevents air passing through the third heat source from flowing into the optical base. Further comprising a detection unit that detects the temperature of the heat source,
The ophthalmologic apparatus according to any one of claims 1 to 9 , wherein said first exhaust fan is controlled based on the detection result of said detector. when the temperature of the heat source reaches or exceeds a first threshold, the output of the first exhaust fan is increased;
11. The ophthalmic apparatus according to claim 10 , wherein the power of said first exhaust fan is reduced when the temperature of said heat source falls below a second threshold that is a temperature lower than said first threshold. further comprising a heat source cover that covers and substantially seals the heat source;
12. The ophthalmic device according to any one of claims 1 to 11 , wherein the heat source cover has an air inlet on the bottom side and an air outlet on the side. 13. An ophthalmic device according to any preceding claim, wherein the ophthalmic device is a scanning ophthalmic device. the ophthalmic device is an OCT device;
14. The ophthalmic apparatus according to any one of claims 1 to 13 , comprising a fiber on the opposite side of the heat source across the optical base. The heat source is a galvanometer driver,
15. The ophthalmic apparatus of any one of claims 1-14 , wherein the optical base comprises a galvo mirror controlled by the galvo driver.

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