JP2011013325A - Microscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microscope radiating exhaust heat efficiently.SOLUTION: In this microscope, a microscope body 21 is equipped with: a body case 71 storing an optical system forming an image by observation light from a sample and an imaging element for imaging the sample through the optical system; a lens barrel 72 mounted on an end side of the body case 71 and storing an objective lens 41; and a light source case 73 mounted on an outer side than the lens barrel 72 on the end side of the body case 71 to form an inside space between the lens barrel 72 and it and storing a light source substrate 76 for supplying electric power into an LED 45 applying illumination light to the sample. The inside space between the lens barrel 72 and the light source case 73 is communicated with the outside on a front end side and a rear end side for the light source substrate 76. This microscope can be applied to, for example, a microscope observation system usable by separating the microscope body from a stand.

Description

  The present invention relates to a microscope.

  In general, a microscope called a digital microscope that acquires an enlarged image of a sample with an image sensor such as a CCD (Charge Coupled Device) is known. Conventionally, a digital microscope is configured by connecting a microscope main body having an optical system such as an objective lens and an image sensor such as a CCD, and a controller for controlling the operation of the microscope main body with a cable.

  For example, as disclosed in Patent Document 1, a cable connecting a microscope main body and a controller surrounds an image line that transmits an image signal and an illumination light line that transmits illumination light.

  And the illumination light from a light source is transmitted to the microscope main body via the illumination light line of a cable, and is irradiated to a sample from the front-end | tip of a microscope main body. In addition, an image captured by the microscope main body is displayed on a monitor connected to the controller via the cable image line.

JP 2008-175893 A

  By the way, in the conventional digital microscope, the microscope body and the controller are connected with a cable, so that observation can be made only within the cable length range, or the cable routing becomes complicated, etc. Because of the restrictions, the usability was bad. On the other hand, for example, it is conceivable to configure a digital microscope without connecting the microscope main body and the controller with a cable. In this case, however, it becomes impossible to transmit the illumination light through the illumination light line. Need to house the light source.

  However, when the light source is housed in the microscope main body, the temperature of the microscope main body rises due to heat generated from the light source, and thus there has been a problem that heat must be exhausted efficiently.

  This invention is made | formed in view of such a condition, and enables it to perform waste heat efficiently.

  The microscope of the present invention includes an optical system that forms an image of observation light from a sample, and an imaging unit that images the sample through the optical system, and a housing that holds an objective lens at a tip portion thereof. A light source for irradiating the sample with illumination light and a substrate for supplying power to the light source are mounted on the outer periphery of the housing so as to form an internal space between the front end portion of the housing for holding the objective lens. A light source housing for housing, and a vent hole for allowing air to flow into the internal space is provided on a front end side of the light source housing which is the holding side of the objective lens, and a rear end side is provided on the rear end side. A vent is provided to allow air to flow out of the internal space.

  In the microscope of the present invention, the front end side, which is the holding side of the objective lens of the light source casing, is provided with a vent that allows air to flow into the internal space, and the rear end side of the air from the internal space is provided. A vent is provided to allow outflow. Thereby, the heat generated in the light source casing can be efficiently discharged to the outside.

  According to the microscope of the present invention, exhaust heat of a microscope having a light source can be efficiently performed.

It is a block diagram which shows the structural example of one Embodiment of the microscope observation system to which this invention is applied. It is a perspective view of a microscope main body. It is the figure which expanded the front-end | tip part of the microscope main body.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

  FIG. 1 is a configuration diagram showing a configuration example of an embodiment of a microscope observation system to which the present invention is applied. In the present specification, the term “system” represents the entire apparatus constituted by a plurality of apparatuses.

  The microscope observation system in FIG. 1 is configured by connecting a microscope 11 that acquires an enlarged image (observation image) of a sample to be observed and a monitor 12 that displays an image of the sample acquired by the microscope 11. For example, it is used for observing the sample 13 which is a sample processed into a size that can be placed on the stage of the microscope 11. The microscope observation system can be used for observing a large sample (not shown) that cannot be placed on the stage of the microscope 11, for example.

  That is, the microscope 11 includes a microscope main body 21 provided with an optical system for acquiring a magnified image of a sample, an imaging device, an electric system for controlling each unit, and the like, and a stand 22 connected to the monitor 12. The microscope main body 21 can be attached to and detached from the stand 22, and there is no cable connecting the microscope main body and the stand as disclosed in Patent Document 1, and an image of the sample is acquired by the microscope main body 21 alone. It is configured to be able to. For example, the spectroscope observes the sample 13 with the microscope main body 21 mounted on the stand 22, and observes a large sample (not shown) with the microscope main body 21 removed from the stand 22. In this case, since the microscope main body 21 does not have a cable as described above, it is easy to use. FIG. 1 shows a state in which the microscope main body 21 is detached from the stand 22, and a part of the microscope main body 21 is shown in cross section.

  The monitor 12 displays an image of the sample acquired by the microscope main body 21 and various types of information related to observation conditions such as the zoom magnification of the microscope main body 21 and the amount of illumination light. The monitor 12 is provided with a touch panel superimposed thereon, and the spectroscope can perform various operations on the microscope 11 by touching buttons or the like displayed on the monitor 12.

  The microscope main body 21 is detached from the cylindrical main body portion 31 centering on the optical axis L1 of the objective lens 41, the display operation portion 32 having a display portion and an operation portion (see FIG. 2 described later), and the stand 22. And a grip 33 that is used by the spectrographer to hold the microscope main body 21.

  In the main body 31, an objective lens 41, zoom lenses 42a to 42d, an imaging lens 43, and an imaging element 44 such as a CCD are arranged along the optical axis L1 from the front end side toward the rear end side. Has been.

  At the time of observing the sample, observation is performed with the distal end side of the main body portion 31 including the objective lens 41 directed toward the sample. For example, when observing the sample 13 placed on the stage 51 as shown in FIG. 1, the microscope main body 21 is placed on the stand so that the distal end side of the main body 31 faces downward in the substantially vertical direction (position facing the sample 13). 22 is connected to perform observation.

  Then, the observation light from the sample is introduced into the main body 31 through the objective lens 41, enlarged to a predetermined magnification by the zoom lenses 42 a to 42 d, and then the light receiving surface of the image sensor 44 by the imaging lens 43. An image of the sample is formed on the screen. Here, the zoom lenses 42b and 42c are configured to be movable along the optical axis L1 by, for example, a linear guide, a feed screw, and a motor (not shown) that drives the feed screw. By adjusting the positions of the zoom lenses 42b and 42c, the zoom magnification for imaging the sample is adjusted.

  In addition, an LED 45 that irradiates the sample with illumination light is mounted at the distal end portion of the main body 31. In the microscope main body 21, for example, a plurality of LEDs 45 are formed in an annular shape along the outer circumference of the objective lens 41. Are arranged side by side. The configuration of the tip portion of the main body 31 such as the LED 45 will be described later with reference to FIG.

  The grip 33 is configured to be able to store a battery 46 such as a lithium ion secondary battery, for example, and the battery 46 supplies power to each part in the microscope main body 21 when the microscope main body 21 is detached from the stand 22. Supply. The battery 46 is charged with electric power supplied from a charging device (not shown) built in the stand 22 when the microscope main body 21 is connected to the stand 22, or from the grip 33. 46 can be extracted and attached to a dedicated charging device.

  An imaging button 47 is disposed on the side surface of the grip 33 in the vicinity of the connecting portion between the grip 33 and the main body 31. For example, when the examiner operates the image pickup button 47, the image data of the sample imaged by the image sensor 44 is recorded in a recording unit (for example, a recording medium 64 in FIG. 2 described later). When the microscope main body 21 is connected to the stand 22, the sample image data imaged by the imaging device 44 is stored in a recording unit (not shown) such as a large-capacity hard disk drive built in the stand 22. Can be recorded.

  The imaging button 47 is operated when the microscope main body 21 is detached from the stand 22 and used. Normally, when the imaging button 47 is operated with the microscope main body 21 attached to the stand 22, the microscope main body 21 may vibrate due to vibration. Therefore, when the microscope main body 21 is attached to the stand 22, the imaging button 47 is used. The function is preferably turned off. In this case, it is preferable to operate the imaging with the GUI displayed on the monitor 12.

  The stand 22 is formed in a substantially L shape by a base portion 22a extending in the horizontal direction and a column portion 22b extending in the vertical direction, and a stage 51 on which the sample 13 is placed is disposed on the upper surface of the base portion 22a. The arm portion 52 is disposed on the side surface of the support column portion 22b on the stage 51 side.

  The arm portion 52 is provided with a fitting portion 53 that is mechanically connected to the microscope main body 21 and a connector portion 54 that is electrically connected to the microscope main body 21 on the distal end side extending from the column portion 22b.

  The fitting part 53 is, for example, a male ant formed so as to extend in the longitudinal direction of the column part 22b, and the male ant and a female ant (not shown) formed on the microscope main body 21 are fitted. The microscope main body 21 and the stand 22 are mechanically connected. When the microscope main body 21 and the stand 22 are mechanically connected, the connector portion (not shown) of the microscope main body 21 arranged at a position corresponding to the connector portion 54 and the connector portion 54 are electrically connected. Connected. That is, the microscope main body 21 and the stand 22 are configured to be electrically connected simultaneously with the mechanical connection.

  In this way, by electrically connecting the microscope body 21 and the stand 22, power and control signals are supplied from the stand 22 to the microscope body 21 via the connector portion 54, and the microscope body 21 to the stand 22. Image data is supplied. In addition, the microscope main body 21 and the stand 22 may be fixed by using a fixing jig (clamp, set screw, or the like) as necessary, in addition to fixing by the fitting force by the fitting portion 53.

  Moreover, the arm part 52 is comprised so that a movement along the longitudinal direction of the support | pillar part 22b is possible. A vertical movement handle 55 is provided on the side surface on the front side of the support column 22b, and the arm part 52 moves up and down according to the operation of the vertical movement handle 55 by the examiner. The microscope main body 21 connected to 52 moves.

  On the other hand, a vertical movement handle 56 is provided on the side surface on the front side of the base portion 22a, and the stage 51 moves up and down in the vertical direction in accordance with the operation of the vertical movement handle 56 by the examiner. The sample 13 placed on the stage 51 moves. That is, the distance between the microscope main body 21 and the sample 13 is adjusted according to the operation of the vertical movement handle 55 or 56, and thereby the focus adjustment when imaging the sample 13 is performed.

  Further, on the side surface on the front side of the base portion 22a, when the microscope main body 21 is used while being attached to the stand 22, the zoom switch 57 operated when changing the zoom magnification of the microscope main body 21 and the illumination light by the LED 45 are used. And a light control switch 58 that is operated when adjusting the amount of light. The zoom switch 57 and the dimming switch 58 can be operated when the microscope main body 21 is connected to the stand 22. That is, when the microscope main body 21 is mounted on the stand 22, a control signal corresponding to the operation of the spectroscope with respect to the zoom switch 57 and the dimming switch 58 is supplied to the microscope main body 21 via the connector portion 54 and zoomed. The magnification and the amount of illumination light are adjusted.

  Thus, the microscope 11 has a configuration in which the microscope main body 21 and the stand 22 are not connected by a cable, and the microscope main body 21 includes all the blocks necessary for observing the sample in a state where the microscope main body 21 is detached from the stand 22, The microscope main body 21 can be used alone.

  The spectrographer can perform mechanical connection and electrical connection between the microscope main body 21 and the stand 22 in one operation. When the microscope main body 21 is connected to the stand 22, The power source is switched so that each unit in the main body 21 is driven by the power supplied from the stand 22, the image being captured by the image sensor 44 is displayed on the monitor 12, and the storage destination of the image data captured by the image sensor 44 Can be automatically switched to a recording unit (not shown) in the stand 22.

  Next, FIG. 2 is a perspective view of the microscope main body 21.

  As shown in FIG. 2, the microscope main body 21 is formed with a grip 33 that protrudes from the side surface of the main body 31 in the outer circumferential direction, and is approximately 90 degrees with respect to the grip 33 about the central axis of the main body 31. A display operation unit 32 is provided in the direction of.

  In the display operation unit 32, an operation unit 61 including a plurality of operation buttons is fixed to the side surface of the main body unit 31, and a display unit 62 including a liquid crystal monitor that displays an image of the captured sample 13 is a hinge unit 63. It is attached to the operation part 61 so as to be openable and closable and rotatable.

  The operation unit 61 includes operation buttons for the spectrographer to perform various operations on the microscope main body 21 and a recording medium 64 (for example, a card-type flash memory) that records image data of the sample imaged on the microscope main body 21. ) Can be inserted and removed.

  The display unit 62 displays a live image that is an image being captured by the microscope main body 21 and a reproduced image that is an image obtained by reproducing image data recorded on the recording medium 64. In addition, the display unit 62 displays various types of information related to observation conditions such as the zoom magnification of the microscope body 21 and the amount of illumination light.

  The hinge part 63 has a first rotation axis that can rotate 180 degrees for the display part 62 to open and close with respect to the operation part 61, and an axis that is orthogonal to the first rotation axis and the central axis of the main body part 31. A mechanism (so-called rotating biaxial mechanism) that supports the display unit 62 so as to be openable / closable and rotatable with respect to the operation unit 61 by a second rotation shaft that can rotate 180 degrees at the center. Further, the hinge part 63 has an appropriate holding force, and can hold the display part 62 at an arbitrary angle with respect to the operation part 61.

  Next, FIG. 3 is an enlarged view of the distal end portion of the microscope main body 21. 3A shows a cross-sectional view of the distal end portion of the microscope main body 21 along the optical axis L1, and FIG. 3B shows a view of the distal end portion of the microscope main body 21 as viewed from the distal end side.

  As shown in FIG. 3A, a lens barrel 72 and a light source casing 73 are attached to the distal end side of a cylindrical main body casing 71 at the distal end portion of the microscope body 21 on the objective lens 41 side, and the distal end side of the light source casing 73 In addition, a support portion 75 that supports the diffuser 74 is mounted.

  The main body casing 71 houses an optical system closer to the image sensor 44 (FIG. 1) than the zoom lens 42 b, and a lens barrel 72 that houses the objective lens 41 and the zoom lens 42 a includes the main body casing 71. By attaching to the front end, the opening on the front end side of the main body casing 71 is closed, and the lens barrel 72 also serves as a sealing means for sealing the main body casing 71. Further, the lens barrel 72 and the light source casing 73 are not in contact with each other, and are mounted on the distal end side of the main body casing 71 so that the light source casing 73 is disposed outside the lens barrel 72. In the present embodiment, the main body casing 71 and the lens barrel 72 are separate members, but a holding portion that holds the objective lens 41 and the zoom lens 42 a may be provided at the tip of the main body casing 71.

  An annular light source substrate 76 on which a plurality of LEDs 45 are mounted is mounted inside the light source housing 73. For example, as shown in FIG. 3B, in the microscope main body 21, eight LEDs 45a to 45h are arranged along the outer circumference of the objective lens 41, and the LEDs 45a to 45h are equidistant from the annular light source substrate 76. Has been implemented. In addition, when it is not necessary to distinguish LED45a thru | or 45h, it is hereafter called LED45 suitably.

  Further, the light source substrate 76 is bonded by, for example, a high thermal conductive adhesive or is fastened by screws or the like, and the back surface (the surface opposite to the surface on which the LED 45 is mounted) is attached to the light source housing 73. The light source casing 73 is attached so as to be in close contact.

  On the front end side of the LED 45, an illumination lens 77 for condensing illumination light emitted from the LED 45 and irradiating the sample is provided.

  The diffuser 74 is an annular diffusing plate disposed on the front end side of the illumination lens 77, and diffuses the illumination light emitted from the LED 45 to adjust it to a uniform brightness. The diffuser 74 is configured such that the annular outer peripheral portion thereof is supported by the support portion 75, and the inner side surface of the annular diffuser 74 is not in contact with the lens barrel 72. That is, a gap is provided between the inner surface of the diffuser 74 and the outer peripheral surface of the lens barrel 72.

  As shown in FIG. 3A, an inner space is provided between the lens barrel 72 and the light source casing 73 at the distal end portion of the microscope main body 21, and this inner space is formed between the inner surface of the diffuser 74 and the lens. The distal end surface of the microscope main body 21 is connected to the external environment by a gap between the lens barrel 72 and the outer peripheral surface.

  Further, in the circumferential direction near the rear end (on the main body casing 71 side) of the light source casing 73, a plurality of vent holes 78 are formed to connect the internal space of the distal end portion of the microscope main body 21 and the external environment. The vent 78 is formed, for example, so as to be axially symmetric with respect to the optical axis L1, and in the example of FIG. 3A, two vents are provided on the left side of the optical axis L1 (for example, the grip 33 side in FIG. 1). 78a and 78b are formed, and two vent holes 78c and 78d are formed on the right side of the optical axis L1 (for example, on the opposite side of the grip 33 in FIG. 1).

  As described above, a plurality of vent holes 78 are formed near the rear end of the light source casing 73, and a gap is provided between the lens barrel 72 and the diffuser 74 on the front end side of the light source casing 73. In the internal space of the distal end portion of the microscope main body 21, air freely flows and a flow path is formed so as to pass around the light source substrate 76.

  For example, when the amount of illumination light from the LED 45 is increased when observing the microscope body 21 at a high magnification, the amount of heat generated by the light source substrate 76 increases as the power consumption of the LED 45 increases. At this time, a gap is provided on the front end side with respect to the light source substrate 76, and a vent hole 78 is formed on the rear end side with respect to the light source substrate 76, so that the internal space of the distal end portion of the microscope body 21 is formed. An air flow is generated, and heat generated in the light source substrate 76 along with the air flow is discharged to the outside.

  In particular, when observation is performed with the microscope main body 21 attached to the stand 22, the microscope main body 21 maintains the same posture for a long time, and the air around the light source substrate 76 rises due to heat generation in the light source substrate 76. Therefore, heat convection is generated such that air flows out from the vent 78 formed in the vicinity of the rear end of the light source casing 73 and external air flows in from the gap between the lens barrel 72 and the diffuser 74. To do. By this thermal convection, the heat generated in the light source substrate 76 can be efficiently discharged to the outside. Therefore, it is an important configuration that the gap between the lens barrel 72 and the diffuser 74 is the lower portion and the vent 78 is positioned at the upper portion.

  Further, specifically, the vent holes 78a and 78b are formed on the grip 33 side and the vent holes 78c and 78d are formed on the opposite side so that the vent hole 78 is axially symmetric with respect to the optical axis L1. Thus, when the microscope body 21 is detached from the stand 22 and the microscope body 21 is observed in the horizontal direction, the heat generated in the light source substrate 76 can be efficiently discharged to the outside.

  That is, in the microscope main body 21 in which the vent holes 78 are formed in this way, for example, when the examiner grips the grip 33 and observes a vertical surface, that is, the grip 33 with the optical axis L1 directed in the horizontal direction. When the observation is performed in a state in which it is directed in a substantially vertical direction, the air warmed in the internal space of the distal end portion of the microscope body 21 flows out from the vent holes 78c and 78d formed on the opposite side of the grip 33, and Thermal convection is generated such that external air flows from the vent holes 78a and 78b formed on the grip 33 side. By this thermal convection, the heat generated in the light source substrate 76 can be efficiently discharged to the outside.

  As described above, when the microscope main body 21 is used while attached to the stand 22, or when the microscope main body 21 is detached from the stand 22 and the microscope main body 21 is directed in the vertical direction, the microscope main body 21 is also set in the horizontal direction. The heat generated in the light source substrate 76 can be efficiently discharged even when it is directed, and the heat generated in the light source substrate 76 can be efficiently discharged regardless of the direction in which the microscope main body 21 is directed. it can.

  In addition, a plurality of pleated fins 79 are formed on the outer peripheral surface of the light source casing 73 so as to protrude outward and make one round in the circumferential direction. In the example of FIG. 3A, five rows of fins 79a to 79e are formed, and these fins 79a to 79e increase the surface area of the outer peripheral side surface of the light source casing 73, that is, the surface area exposed to the external atmosphere. In addition, the heat conducted from the light source substrate 76 to the light source casing 73 can be efficiently discharged to the outside.

  In particular, for example, the light source casing 73 and the light source substrate 76 are made of aluminum having a high thermal conductivity (thermal conductivity: 236 W / (m · k)), so that the fins 79 a to 79 e of the light source casing 73 are removed. Heat dissipation efficiency can be improved.

  On the other hand, for example, the main body housing 71 to which the light source housing 73 and the lens barrel 72 are attached is formed of polycarbonate (thermal conductivity: 0.19 W / (m · k)) having a lower thermal conductivity than aluminum. Yes. In this way, by making the member of the main body casing 71 a member having a lower thermal conductivity than that of the light source casing 73, specifically, a connection portion 71 a to which the lens barrel 72 is connected to the main body casing 71. The member of the main body casing 71 between the main body casing 71 and the connection portion 71b to which the light source casing 73 is connected is a member having a lower thermal conductivity than the light source casing 73, whereby the light source substrate 76. The heat generated in step 1 and conducted to the light source casing 73 is suppressed from being conducted to the lens barrel 72.

  As described above, in the distal end portion of the microscope main body 21, the air flow is likely to be generated in the internal space between the lens barrel 72 and the light source casing 73, and the fins 79 a to 79 e are provided in the light source casing 73. Thus, the heat radiation efficiency is improved, so that the heat generated in the light source substrate 76 can be efficiently discharged to the outside. Thereby, it can suppress that the temperature of the front-end | tip part of the microscope main body 21 rises, for example, the temperature rise which is felt so hot when an examiner contacts the front-end | tip part of the microscope main body 21 is avoided. Thereby, the usability of the microscope main body 21 can be improved.

  Furthermore, while suppressing the temperature rise of the front-end | tip part of the microscope main body 21, the heat | fever which generate | occur | produced in the light source substrate 76 is conducted to the lens-barrel 72 by making the front-end | tip part of the main body housing | casing 71 a member with low heat conductivity. This can be suppressed.

  Thereby, the fall of the performance of the microscope main body 21 is avoided. That is, in the conventional digital microscope, since the illumination light is transmitted through the illumination light line (optical fiber) of the cable connected to the controller, the temperature of the microscope body does not rise. When the controller is not connected with a cable, it is necessary to provide a light source in the microscope main body, and it is necessary to consider a problem caused by a temperature rise of the microscope main body. That is, in the microscope main body 21, since the light source substrate 76 is disposed in the vicinity of the lens barrel 72, heat generated in the light source substrate 76 is conducted to the lens barrel 72 and the lens barrel 72 is thermally expanded. It is conceivable that the distance between the objective lens 41 and the zoom lens 42a changes due to the thermal expansion, and the accuracy of, for example, the zoom magnification and focus decreases.

  On the other hand, in the microscope main body 21, as described above, the heat generated in the light source substrate 76 is suppressed from being conducted to the lens barrel 72, so that the thermal expansion of the lens barrel 72 is suppressed. Accordingly, it is possible to avoid a decrease in the accuracy of the zoom magnification, and it is possible to avoid a decrease in the performance of the microscope main body 21.

  When the zoom magnification by the zoom lenses 42a to 42d is set high and the sample is observed at a high magnification, it is necessary to increase the amount of illumination light, and the amount of heat generated by the light source substrate 76 increases. Since the main body 21 can suppress the temperature rise as described above, for example, it is not necessary to provide a fan for exhaust heat and the portability of the microscope main body 21 can be improved.

  That is, for example, when it is necessary to provide a fan for exhaust heat in the microscope main body, electric power for driving the fan is required, so a high-capacity battery 46 is required. As 21 becomes larger, the weight may increase. On the other hand, in the microscope main body 21, it is not necessary to provide a fan for exhaust heat, and the battery 46 with reduced capacity can be adopted. Therefore, the microscope main body 21 can be reduced in size and weight and the microscope main body 21 can be reduced. The portability of the main body 21 is improved.

  The light source casing 73 and the light source substrate 76 only need to be made of a member having a thermal conductivity of 230 W / (m · k) or more. For example, aluminum alloy, copper, copper alloy, etc. These members can be used. The main body casing 71 between the light source casing 73 and the lens barrel 72 can use a member having a thermal conductivity of 1 W / (m · k) or less in addition to polycarbonate. Thereby, the heat generated by the light source substrate 76 and conducted to the light source casing 73 can be prevented from being conducted to the lens barrel 72 via the main body casing 71.

  In addition to configuring the entire main body casing 71 with a member having low thermal conductivity, for example, a tip portion of the main body casing 71, that is, a connection portion 71a where the lens barrel 72 is connected to the main body casing 71, A portion between the main body housing 71 and the connection portion 71b to which the light source housing 73 is connected may be formed of a member having low thermal conductivity.

  Further, since the microscope main body 21 and the stand 22 are not connected by a cable in the microscope 11, the observation range is not limited by the length of the cable, and the cable routing is considered during observation. Therefore, usability can be improved over conventional digital microscopes.

  In the present embodiment, the internal space between the lens barrel 72 and the light source casing 73 is a single cylindrical space. For example, each of the LEDs 45a to 45h is stored in an independent space. In addition, the front end side and the rear end side of each space may be connected to the outside.

  The embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 11 Microscope, 12 Monitor, 13 Sample, 21 Microscope main body, 22 Stand, 31 Main body part, 32 Display operation part, 33 Grip, 41 Objective lens, 42a thru | or 42d Zoom lens, 43 Imaging lens, 44 Image pick-up element, 45, 45a Thru 45h LED, 46 battery, 47 imaging button, 51 stage, 52 arm part, 53 fitting part, 54 connector part, 55 and 56 vertical movement handle, 57 zoom switch, 58 dimming switch, 61 operation part, 62 display part , 63 hinge part, 64 recording medium, 71 main body case, 72 lens barrel, 73 light source case, 74 diffuser, 75 support part, 76 light source substrate, 77 illumination lens, 78a to 78d vent, 79a to 79e fin

Claims (4)

An optical system that forms an image of observation light from the sample, and an imaging unit that images the sample through the optical system, and a housing that holds an objective lens at a tip portion thereof;
A light source for irradiating illumination light to the sample and a substrate for supplying power to the light source, which is mounted on the outer periphery of the housing so as to form an internal space between the objective lens and the tip of the housing And a light source housing for storing
A vent hole that allows air to flow into the internal space is provided on the front end side, which is the holding side of the objective lens, of the light source casing, and the outflow of air from the internal space is provided on the rear end side. A microscope characterized by being provided with a vent hole that makes it possible. The microscope according to claim 1, wherein a protruding portion protruding outward is formed on an outer surface of the light source casing. The housing includes a main body housing that houses the optical system and the imaging unit, and a lens barrel that is attached to the distal end side of the main body housing and houses the objective lens.
The light source casing is formed of a member having high thermal conductivity,
The main body casing between the mounting portion on which the lens barrel is mounted and the mounting portion on which the light source casing is mounted is formed of a member having a lower thermal conductivity than the member of the light source casing. The microscope according to claim 1 or 2. The housing is provided with a gripping portion that protrudes in the outer peripheral direction from the side surface of the housing,
The light source casing has a vent hole for connecting the internal space and the outside on the gripping portion side and the opposite side thereof so as to be symmetric with respect to the optical axis of the optical system. The microscope according to any one of claims 1 to 3.

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