JP4643618B2 - Optical element driving device - Google Patents

Description

  The present invention relates to an optical system such as an infrared imaging device that is mounted on a moving body including a flying object such as an aircraft, irradiates light onto a target object, and receives and analyzes light from the outside. The present invention relates to an optical element driving apparatus that controls driving of an element.

  In general, as this type of optical element driving device, for example, an infrared imaging device including an infrared imaging device and an infrared laser irradiator is known. In such an infrared imaging device, the infrared laser irradiator irradiates the target object with an infrared laser, and the reflected laser light is received and imaged by the infrared imaging device to extract feature information of the target object.

  In such an infrared imaging device, an infrared laser irradiator and an infrared imaging device which are optical elements are accommodated in a movable body called a shell, and this movable body is mounted on an arm so as to be rotatable around an EL axis. The arm is mounted on the base body so as to be rotatable about the AZ axis, and the base body is mounted on a moving body such as a flying body with the movable body directed to the outside. The infrared laser irradiator has a light guide optical system, and the optical axis of the light guide optical system is arranged with a parallax with respect to the center of the visual field of the infrared imager to obtain a desired optical image.

By the way, in such an infrared imaging device, when the infrared laser irradiator accommodated in the movable body is driven, the imaging element as the optical element generates heat. Therefore, there is a method in which a cooler as a cooling source is built in a swivel portion that is a movable body, and an optical element including a component such as an electrical component housed in the swivel portion is directly heat controlled using the cooler. It is known (for example, see Patent Document 1).
Japanese Utility Model Publication No. 5-56800

  However, the above infrared imaging device has a problem in that the heat control efficiency is inferior due to the configuration in which the cooler serving as a heat source is accommodated in the revolving part, and the size is large, and the production including the design is troublesome. Have.

  Such a situation is not limited to the infrared imaging device, and the same applies to an optical element driving device in an optical system including an optical element.

  The present invention has been made in view of the above circumstances, and can simplify the configuration, realize high-efficiency thermal control, and promote the downsizing and improve the flexibility of manufacturing including design. An object of the present invention is to provide an optical element driving apparatus.

The present invention provides a base body disposed on a moving body and provided with a fluid supply port and a fluid discharge port, and is disposed so as to be rotatable about a first axis with respect to the base body. A first movable body provided with a fluid supply path and a fluid discharge path communicated with the outlet; a housing portion for housing an optical element; and the first shaft with respect to the first movable body. be those that are rotatably disposed on a second axis substantially orthogonal, before Symbol supply passage communicating port and the discharge passage communication opening communicates with the fluid supply passage and a fluid discharge passage of the first movable member is the A second movable body provided on the second shaft with the accommodating portion interposed therebetween, and the first and second movable bodies are driven to rotate about the first and second axes, and the second Control means for directing and controlling the optical element of the movable body, and the fluid taken in from the fluid supply port of the base body The first movable body is guided through the fluid supply path of the first movable body from the supply communication port of the second movable body to the housing portion, and the fluid guided to the housing portion is discharged from the discharge communication passage of the second movable body to the first And a fluid supply means for discharging from the fluid discharge port of the base body through the fluid discharge path of the movable body.

  According to the above configuration, the fluid taken in from the fluid supply port of the base body is guided from the fluid supply path of the first movable body to the supply path communication port of the second movable body, and is received from the supply path communication port. The optical element in the housing portion is thermally controlled. Then, the fluid led to the housing portion of the second movable body and subjected to heat control is led from the discharge passage communication port to the discharge passage of the first movable body, and the fluid discharge of the base body is discharged from the discharge passage. It is guided to the outlet and discharged. This makes it possible to perform highly efficient thermal control without arranging a cooling source in the first and second movable bodies, and it is possible to reduce the size and increase the degree of freedom of manufacturing including the design.

  As described above, according to the present invention, the configuration can be simplified, high-efficiency thermal control can be realized, and miniaturization can be promoted and the freedom of manufacturing including design can be improved. An optical element driving device can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an optical element driving apparatus according to an embodiment of the present invention. An arm portion 11 constituting a first movable body is provided on a base body 10 by a fluid rotary joint structure, for example. It is assembled rotatably around the AZ axis. The arm portion 11 is assembled with a shell portion 12 constituting a second movable body so as to be rotatable around an EL axis which is a second axis substantially orthogonal to the AZ axis.

  The shell portion 12 is provided with a housing portion 121 (see FIG. 2), and the optical element 13 including an electric circuit is housed in the housing portion 121. In the shell portion 12, a light transmission window 122 is accommodated and disposed so as to face the optical element 13 in the accommodation portion 121.

  As shown in FIG. 3, the arm portion 11 is provided on the base body 10 so as to be rotatable around the AZ axis via a seal mechanism 14 and an AZ driving portion 15. The arm portion 11 includes the shell portion 12. It is provided so as to be rotatable around the EL axis via the seal mechanism 16 and the EL drive unit 17.

  The AZ and EL driving units 15 and 17 are each composed of, for example, a motor and an angle detector, and each connection end thereof is connected to the control unit 18 as shown in FIG. The control unit 18 controls the driving of each motor based on the rotation angle information about each axis detected by the angle detectors of the AZ and EL driving units 15 and 17 so that the arm unit 11 is moved to the base body 10. On the other hand, the shell portion 12 is driven to rotate while being sealed by the seal mechanism 14 around the AZ axis, and the shell portion 12 is driven to rotate relative to the arm portion 11 by the seal mechanism 16 around the EL axis. The optical element 13 in 12 is directed in a desired direction.

  The base body 10 is provided with a slip ring mechanism 19 coaxially with the AZ axis. The slip ring mechanism 19 is provided with a fluid supply port 20 constituting a fluid supply unit, for example, coaxially with the AZ axis. In addition, the base portion 10 is provided with a fluid discharge port 21 constituting a fluid discharge portion on a peripheral wall substantially orthogonal to the AZ axis.

  The slip ring mechanism 19 is electrically connected to the control unit 18 and is electrically connected to the optical element 13 accommodated in the accommodating part 121 of the shell part 12 via the arm part 11 side. . The optical element 13 has an electric circuit (not shown) and the like electrically connected to the control unit 18 via the slip ring mechanism 19.

  The arm part 11 is provided with a fluid supply path 111 and a fluid discharge path 112. One end of each of the fluid supply path 111 and the fluid discharge path 112 communicates with the fluid supply port 20 and the fluid discharge port 21 of the base body 10, and the other end is provided in the housing portion 121 of the shell portion 12. The supply channel communication port 123 and the discharge channel communication port 124 communicate with each other.

  Here, the fluid supply port 20 of the base unit 10 communicates with the supply channel communication port 123 of the shell unit 12 via the fluid supply channel 111 of the arm unit 11. The fluid discharge port 21 of the base portion 10 is communicated with the discharge passage communication port 124 of the shell portion 12 via the fluid discharge passage 112 of the arm portion 11.

  The fluid supply port 20 of the base 10 is provided with, for example, a blower fan 22 (see FIG. 4) that constitutes a fluid supply means. When the blower fan 22 is connected to the control unit 18 and driven through the control unit 18, the air is taken into the fluid supply port 20 as shown in FIG. 2 and the fluid supply path 111 of the arm unit 11. Through the supply path communication port 123 of the shell portion 12 to the accommodating portion 121.

  The air supplied to the housing portion 121 cools the optical element 13 in the housing portion 122 and is led from the discharge passage communication port 124 of the housing portion 121 to the fluid discharge passage 112 of the arm portion 11 to be fluid of the base body 10. It is discharged from the discharge port 21.

  For example, a heat insulating material (not shown) is attached to the inner wall of the base body 10, the fluid supply path 111 and the fluid discharge path 112 of the arm part 11, and the housing part 121 of the shell part 12. Thereby, the taken-in air can be efficiently used for thermal control of the optical element 13 accommodated in the accommodating portion 121 of the shell portion 12 without being affected by the environmental temperature.

  In the above-described configuration, the base body 10 has the arm portion 11 and the shell portion 12 moved in a state where the fluid supply port 20 and the fluid discharge port 21 are positioned in a moving body 23 such as a flying body (see FIG. 2). It is exposed and arranged outside the body 23. In this state, the control unit 18 drives and controls the AZ driving unit 15 based on the command signal to rotationally drive the arm unit 11 around the AZ axis, and drives and controls the EL driving unit 17 to control the shell unit 12. The optical element 13 in the accommodating portion 121 is controlled to be directed in a desired direction by being rotationally driven around the EL axis.

  At this time, the control unit 18 drives the blower fan 22 to supply high-quality air that is substantially uniform in temperature condition in the moving body 23 and does not include dust and the like, as shown in FIG. The gas is taken in from the port 20 and supplied from the supply passage communication port 123 of the shell portion 12 to the accommodating portion 121 through the fluid supply passage 111 of the arm portion 11. Then, the optical element 13 including the electric circuit in the accommodating portion 122 is cooled and thermally controlled by the supplied air.

  Then, the air that has been supplied to the housing part 121 and deprived of the heat of the optical element is guided from the discharge passage communication port 124 of the housing part 121 to the fluid discharge path 112 of the arm part 11 as shown in FIG. Are discharged from the fluid discharge port 21 into the moving body 23. As described above, the housing portion 121 of the shell portion 12 is supplied with air of good quality having a substantially uniform temperature condition in the moving body 23 through the blower fan 22, so that the thermal control of the optical element 13 accommodated is arranged. Is done.

  As described above, the optical element driving device takes in air from the fluid supply port 20 of the base body 10 and rotates the air around the AZ axis with respect to the base body 10. The air is guided to the housing portion 121 in which the optical element 13 of the shell portion 12 is driven to rotate about the EL axis with respect to the arm portion 11, and the air guided to the housing portion 121 is returned to the fluid of the arm portion 11 again. The optical element 13 accommodated in the accommodating part 121 is configured to be thermally controlled by discharging to the outside from the fluid outlet 21 of the base body 10 through the discharge path 112.

  According to this, it becomes possible to perform high-efficiency thermal control of the optical element 13 without arranging a cooling source in the arm part 11 and the shell part 12. It is possible to increase the degree of freedom.

  Note that the present invention is not limited to the above-described embodiment, and may be configured to include a heat exchanging portion 33 as shown in FIG. However, in FIG. 7, the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  That is, the heat exchanging portion 33 is connected to the fluid discharge port 21 of the base body 10 at the input end thereof. And the fluid supply port 20 of the said base main body 10 is connected to the output end of the heat exchange part 33 through the circulation fan 34 which comprises a ventilation fan, for example. Thereby, when the fluid is supplied from the fluid discharge port 21, the heat exchanging unit 33 cools the fluid to a desired temperature and forcibly outputs the fluid to the fluid supply port 20 via the circulation fan 34. Thereby, it becomes possible to further improve the cooling efficiency.

  The circulation fan 34 may be arranged not on the output side of the heat exchanging unit 33 but on the input side.

  Moreover, in the said embodiment, although the fluid supply port 20 demonstrated in the case where it comprised so that it might arrange | position coaxially with the AZ axis | shaft of the base main body 10, it does not restrict to this but others are shown in FIG.8 and FIG.9. In this way, it is possible to provide a fluid inlet / outlet at a position substantially parallel to the AZ axis, and the same effective effect is expected.

  That is, in this embodiment, for example, the ring-shaped first and second fluid rotary joint portions 30 and 31 are assembled and arranged via the seal mechanism 32 so as to be rotatable. The first and second fluid rotary joint portions 30 and 31 are provided with fluid passages 301 and 311 that communicate with each other. The first and second fluid rotary joints 30 and 31 are mounted between the base main body 10 and the arm part 11 with the rotation axis thereof as, for example, the AZ axis, and around the AZ axis of the arm part 11. Can be rotated.

  Among these, the first fluid rotary joint portion 30 is provided with, for example, a connection portion 302 that communicates with the fluid supply port 20 or the fluid discharge port 21 of the base body 10 so as to be substantially parallel to the AZ axis. In the other second fluid rotary joint 31, for example, a connection portion 312 communicating with the fluid supply path 111 or the fluid discharge path 112 of the arm portion 11 is provided with a position substantially parallel to the AZ axis. .

  The connection portions 301 and 311 are communicated with each other so that air can be transferred through the fluid paths 301 and 311. Thereby, for example, the air supplied from one connection portion 312 is guided to the other connection portion 302 through the fluid passages 301 and 311 of the first and second fluid rotary joint portions 31 and 30 and between them. Be transported.

  Furthermore, in the said embodiment, although demonstrated in the case where it comprised so that the ventilation fan 22 may be distribute | arranged to the fluid supply port 20 of the base main body 10, it replaces with the ventilation fan 22 and is replaced with the fluid discharge port. 21 may be configured such that a suction fan is provided, or a blower fan 22 and a suction fan may be provided in the fluid supply port 20 and the fluid discharge port 21 of the base body 10, respectively. There is expected.

  Moreover, although the case where it comprised using air as a fluid was demonstrated in the said embodiment, it can also comprise using nitrogen etc., without restricting to this.

  Furthermore, in the above-described embodiment, the case where the present invention is applied to a drive structure having a biaxial structure has been described. However, the present invention is not limited to this, and the present invention can be applied to a drive structure having two or more axes, and the same effect is expected. .

  Therefore, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

  For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the effect of the invention can be obtained. In such a case, a configuration in which this configuration requirement is deleted can be extracted as an invention.

It is the perspective view which showed the external appearance of the optical element drive device which concerns on one embodiment of this invention. It is the schematic diagram which showed the movement path | route of the air of FIG. It is the fracture | rupture figure which fractured | ruptured and showed FIG. 1 on the AZ axis | shaft. It is the block diagram which took out and showed the control system of FIG. It is the fracture | rupture figure which showed the air supply system of FIG. It is the fracture | rupture figure which showed the air exhaust system of FIG. It is the schematic diagram shown in order to demonstrate the principal part structure of the optical element drive device which concerns on other embodiment of this invention. It is the perspective view which took out and showed the principal part of the optical element drive device which concerns on other embodiment of this invention. It is the schematic diagram which showed the assembly | attachment state of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Base body, 11 ... Arm part, 111 ... Fluid supply path, 112 ... Fluid discharge path, 12 ... Shell part, 121 ... Storage part, 122 ... Permeation window, 123 ... Supply path communication port, 124 ... Discharge path communication port DESCRIPTION OF SYMBOLS 13 ... Optical element 14 ... Seal mechanism 15 ... AZ drive part 16 ... Seal mechanism 17 ... EL drive part 18 ... Control part 19 ... Slip ring mechanism 20 ... Fluid supply port 21 ... Fluid discharge port , 22 ... Blower fan, 23 ... Moving body, 30 ... First fluid rotary joint, 31 ... Second fluid rotary joint, 301, 311 ... Fluid path, 302, 312 ... Connection, 32 ... Sealing mechanism, 33 ... Heat exchange part.

Claims (9)

A base body disposed on the moving body and provided with a fluid supply port and a fluid discharge port;
A first movable body that is arranged to be rotatable about a first axis with respect to the base body, and is provided with a fluid supply path and a fluid discharge path communicating with the fluid supply port and the fluid discharge port;
Has a housing part which optical elements are accommodated, there is rotatably disposed a second axis substantially orthogonal to said first axis relative to said first movable member, before Symbol first A second movable body in which a supply path communication port and a discharge path communication port communicated with a fluid supply path and a fluid discharge path of one movable body are provided on the second shaft across the housing portion ;
Control means for rotationally driving the first and second movable bodies around the first and second axes to control the orientation of the optical elements of the second movable body;
The fluid is taken in from the fluid supply port of the base body, led from the supply communication port of the second movable body through the fluid supply path of the first movable body to the housing portion, and the fluid guided to the housing portion is Fluid supply means for discharging from the fluid discharge port of the base body through the fluid discharge path of the first movable body from the discharge communication path of the second movable body;
An optical element driving apparatus comprising:   2. The fluid supply port and the fluid discharge port of the base body, wherein one of the fluid supply port and the fluid discharge port is disposed on the first axis, and the other is disposed substantially orthogonal to the first axis. The optical element driving device described.   One of the fluid supply port and the fluid discharge port of the base body is provided on an axis substantially parallel to the first axis, and the other is arranged substantially orthogonal to the first axis. The optical element driving device according to claim 1.   The optical element driving device according to any one of claims 1 to 3, wherein a heat insulating material is attached to an inner wall of a portion through which the fluid of the base body and the first and second movable bodies pass.   5. The optical element drive according to claim 1, wherein the fluid supply unit includes a heat exchanging unit, cools the fluid discharged from the fluid discharge port, and supplies the cooled fluid to the fluid supply port. apparatus.   5. The optical element driving device according to claim 1, wherein air in the movable body is introduced into a fluid supply port of the base body, and is discharged into the movable body from the fluid discharge port. .   The optical element according to claim 1, wherein the optical element is housed and disposed in the housing portion so as to be rotatable about a third axis substantially orthogonal to the first or second axis. Element driving device.   The optical element driving apparatus according to claim 1, wherein the moving body is a flying body, and at least the first and second movable bodies are disposed on the outside side.   The optical element driving device according to claim 1, wherein the fluid supply unit is provided in at least one of a fluid supply port and a fluid discharge port of the base body.

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