JP2016090901A - Optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device and a displayable optical device having a simple structure, allowing easy production thereof at an inexpensive price.SOLUTION: An optical device 1 includes: a luminescent part 2 configured to emit coherent light; a hologram 4 having at least a first hologram area 41 storing predetermined information and a second hologram area 42 storing information different from that of the first hologram area 41; and an area selection part 3 in which the light emitted from the luminescent part 2 moves so as to include at least one of the first hologram area 41 and the second hologram area 42.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an optical device capable of illuminating and displaying using hologram reproduction light.

  There is a dimming system in which the power system of an incandescent lamp or LED light source is linked to various sensors in the room, and the power is turned off when a person cannot pass, or the amount of light is adjusted by sensing outside light.

  In recent years, laser light sources, particularly visible light lasers, have advantages such as straightness, long life, high color purity, and high luminous efficiency, and are expected as next-generation light sources to be developed for displays, illumination, optical sensing, and the like. By applying the laser light source to the illumination field, the illumination area can be functionally controlled with high light utilization efficiency.

  On the other hand, a hologram is a device that can diffract light with high efficiency with respect to a design wavelength and is compatible with an LED, a laser, or the like. In addition to displaying pre-recorded images and characters, holograms can be pre-recorded with various optical elements to provide beam shaping and homogenization functions, combined with lasers and variable control devices. Various lighting systems can be constructed. In particular, it is a great advancement not only to turn on / off the power supply or adjust the amount of light, but also to be able to change the irradiation area, change the color, and display images and characters.

  As a device for variably illuminating a plurality of illumination regions using a laser and a hologram, there is a method of selectively irradiating a region-divided hologram using a scanning device as in the following prior art. This not only makes the irradiation area variable, but also reduces speckle.

JP 2012-230310 A

However, MEMS (Micro Electro) usually used in optical scanning devices.
(Mechanical System) scanners and polygon scanners are expensive, and the arrangement of optical systems may be complicated. Furthermore, since it is necessary to secure the output of the light source to some extent, it is expected that sufficient measures for heat dissipation should be taken into consideration.

  The present invention provides an illumination and display optical device that can be easily and inexpensively manufactured with a simple structure without using a scanning device.

An optical device according to the present invention that achieves the above object is as follows.
A light emitting unit that emits coherent light;
A hologram having at least a first hologram area in which predetermined information is recorded and a second hologram area in which information different from the first hologram area is recorded;
A region selector that moves so that light emitted from the light emitting unit includes at least one of the first hologram region and the second hologram region;
It is characterized by providing.

In the optical device according to the present invention,
The region selection unit moves one dimensionally.

In the optical device according to the present invention,
The light emitting unit has a light source corresponding to red, green, and blue,
The hologram has regions corresponding to red, green, and blue in which information is recorded with respect to light sources corresponding to the red, green, and blue, respectively.

In the optical device according to the present invention,
The light emitting unit is composed of a laser array having a plurality of laser light sources,
The irradiation area of the laser array is smaller than the first hologram area and the second hologram area.

In the optical device according to the present invention,
An input unit for instructing movement of the region selection unit;
A drive unit for moving the region selection unit;
A control unit that controls the drive unit in response to an instruction from the input unit;
It is characterized by providing.

In the optical device according to the present invention,
A storage unit that stores a movement position of the region selection unit according to an instruction from the input unit is provided.

In the optical device according to the present invention,
The light that has passed through the hologram projects illumination light.

In the optical device according to the present invention,
The light passing through the hologram projects at least one of an image and a character.

  According to the present invention, it is possible to provide an optical device capable of illumination and display that can be easily and inexpensively manufactured with a simple structure.

It is a side view of the optical apparatus of 1st Embodiment. It is a front view of the hologram of the optical device of the first embodiment. It is a top view of the optical apparatus of 2nd Embodiment. It is a front view of the hologram of the optical apparatus of 2nd Embodiment. It is a perspective view of the optical apparatus of 3rd Embodiment. It is a front view of the hologram of the optical apparatus of 3rd Embodiment. It is a perspective view of the optical apparatus of 4th Embodiment. It is a perspective view of the optical apparatus of 5th Embodiment.

  The optical device according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a side view of the optical device according to the first embodiment. FIG. 2 is a front view of the hologram of the optical device according to the first embodiment.

  The optical device 1 according to the first embodiment includes a light emitting unit 2, a mirror unit 3 as a region selection unit, a hologram 4, an input unit 5, a control unit 6, a storage unit 7, and a drive unit 8. Prepare.

  The light emitting unit 2 emits coherent laser light having a predetermined wavelength that has directivity and is amplified. The light emitting unit 2 may be a laser array in which a plurality of elements are bundled. Moreover, the light emission part 2 may be what can irradiate the laser beam of a some wavelength.

  The mirror unit 3 changes the region in which the light emitted from the light emitting unit 2 enters the hologram 4 by moving its position. The mirror unit 3 according to the first embodiment has a structure in which the bottom surface is formed in a plane, and the light irradiated by the light emitting unit 2 is reflected on the inclined surface by moving on a plane (not shown) and is incident on different regions of the hologram 4. is there. In the present embodiment, the mirror unit 3 that reflects the light emitted from the light emitting unit 2 is used as the region selection unit. However, the region selection unit may be refracted by a prism or the like.

  The hologram 4 has a hologram 40 including at least a first hologram area 41 and a second hologram area 42. Different information is recorded in the first hologram area 41 and the second hologram area 42, and when laser light is incident from the light emitting unit 2, light including different information is emitted. For example, the light emitted from the first hologram area 41 and the second hologram area 42 projects different illumination ranges, display images, characters, or the like.

  The input unit 5 is a switch or various sensors operated by an operator, and inputs a detection signal to the control unit 6. For example, when the optical device of this embodiment is applied to a moving body such as an automobile, the input unit 5 includes a vehicle headlight switch or an obstacle sensor that detects an obstacle.

  The storage unit 6 stores an area of the hologram 4 corresponding to the input content of the input unit 5. For example, when the optical device of the present embodiment is applied to a moving body such as an automobile, the storage unit 6 sets the first hologram region 41 of the hologram 4 when an instruction to make a high beam is input from the headlight changeover switch. Etc. are remembered. Note that the storage unit 6 may be included in the control unit 7.

  The control unit 7 drives the drive unit 8 in accordance with instructions from the input unit 5 and the storage unit 6. The drive unit 8 includes an actuator that moves the hologram frame portion 4 a of the hologram 4 along the support rail 31 of the support unit 3. For example, the drive unit 8 includes a motor and a ball screw or an electromagnetic solenoid.

  Next, the operation of the optical device 1 according to the first embodiment will be described.

  In order to move from the first state in which the irradiation light 10 is applied to the first light region 11 to the second state in which the irradiation light 10 is applied to the second light region 12, a switching signal is first received from the input unit 5. Input to the control unit 7. The control unit 7 acquires the region of the hologram 4 corresponding to the input content of the input unit 5 from the storage unit 6. Thereafter, the control unit 7 moves the mirror unit 3 by driving the drive unit 8 so that the region of the hologram 4 acquired from the storage unit 6 is irradiated from the light emitting unit 2.

For example, when the optical device according to the present embodiment is applied to a moving body such as an automobile, an instruction to change to a low beam from a state in which the headlight switch of the input unit 5 indicates a high beam as a state before the control is given to the control unit. 7, the control unit 7 acquires a signal stored in the storage unit 6 that the region corresponding to the low beam is the second hologram region 42. Then, the control unit 7 moves the mirror unit 3 by driving the drive unit 8 so that the second hologram region 42 of the hologram 4 is irradiated from the light emitting unit 2.

  In the hologram 4, the first hologram area 41 and the second hologram area 42 may overlap. When the light emitting unit 2 irradiates the portion where the first hologram region 41 and the second hologram region 42 overlap, the incident light is emitted from the first hologram region 41 and the second hologram region 42, respectively.

  Further, the light emitted from the light emitting unit 2 may straddle the first hologram region 41 and the second hologram region 42. When the light emitted from the light emitting unit 2 extends over the first hologram region 41 and the second hologram region 42, the incident light is emitted from the first hologram region 41 and the second hologram region 42, respectively.

  As described above, according to the optical device 1 of the first embodiment, it is possible to provide a projectable optical device 1 that can be easily and inexpensively manufactured with a simple structure.

  Next, an optical device according to a second embodiment will be described.

  FIG. 3 is a plan view of the optical device according to the second embodiment. FIG. 4 is a front view of a hologram of the optical device according to the second embodiment.

  The optical device 1 according to the second embodiment includes a light emitting unit 2, a mirror unit 3 as a region selection unit, a hologram 4, an input unit 5, a control unit 6, a storage unit 7, and a drive unit 8. Prepare.

  The light emitting unit 2 emits coherent laser light having a predetermined wavelength that has directivity and is amplified. The light emitting unit 2 may be a laser array in which a plurality of elements are bundled. The light emitting unit 2 may be capable of irradiating laser beams having a plurality of wavelengths. The light emitting unit 2 of the second embodiment includes at least three light sources 2R, 2G, and 2B corresponding to red (R), green (G), and blue (B) colors.

  The mirror unit 3 changes the region in which the light emitted from the light emitting unit 2 enters the hologram 4 by moving its position. The mirror unit 3 of the second embodiment has a structure in which the side surface is formed in a plane, and the light irradiated by the light emitting unit 2 is reflected on the inclined surface by moving on a plane (not shown) and is incident on different regions of the hologram 4. is there. In the present embodiment, the mirror unit 3 that reflects the light emitted from the light emitting unit 2 is used as the region selection unit. However, the region selection unit may be refracted by a prism or the like.

  The hologram 4 has at least a first hologram area 41 and a second hologram area 42. Different information is recorded in the first hologram area 41 and the second hologram area 42, and when laser light is incident from the light emitting unit 2, light including different information is emitted. For example, the light emitted from the first hologram area 41 and the second hologram area 42 projects different illumination ranges, display images, characters, or the like. As shown in FIG. 4, the hologram 4 of the second embodiment includes a first hologram area 41R, 41G, 41B and a second hologram area corresponding to the three light sources 2R, 2G, 2B of red R, green G, and blue B. 42R, 42G, and 42B are alternately arranged in the horizontal direction.

The input unit 5 is a switch or various sensors operated by an operator, and inputs a detection signal to the control unit 6. For example, when the optical device of this embodiment is applied to a moving body such as an automobile, the input unit 5 includes a headlight switch or an obstacle sensor that detects an obstacle.

  The storage unit 6 stores an area of the hologram 4 corresponding to the input content of the input unit 5. For example, when the optical device of the present embodiment is applied to a moving body such as an automobile, the storage unit 6 sets the first hologram region 41 of the hologram 4 when an instruction to make a high beam is input from the headlight changeover switch. Etc. are remembered. Note that the storage unit 6 may be included in the control unit 7.

  The control unit 7 drives the drive unit 8 in accordance with instructions from the input unit 5 and the storage unit 6. The drive unit 8 includes an actuator that moves the hologram frame portion 4 a of the hologram 4 along the support rail 31 of the support unit 3. For example, the drive unit 8 includes a motor and a ball screw or an electromagnetic solenoid.

  Next, the operation of the optical device 1 according to the second embodiment will be described.

  In order to move from the first state in which the irradiation light 10 is applied to the first light region 11 to the second state in which the irradiation light 10 is applied to the second light region 12, a switching signal is first received from the input unit 5. Input to the control unit 7. The control unit 7 acquires the region of the hologram 4 corresponding to the input content of the input unit 5 from the storage unit 6. Thereafter, the control unit 7 moves the mirror unit 3 by driving the drive unit 8 so that the region of the hologram 4 acquired from the storage unit 6 is irradiated from the light emitting unit 2.

  For example, an instruction to project a color image on the second light region 12 from a state in which the display changeover switch of the input unit 5 instructs to project a color image on the first light region 11 as a state before control is performed by the control unit. 7, the control unit 7 acquires a signal stored in the storage unit 6 that the region corresponding to the projection of the color image on the second light region 12 is the second hologram region 42. Then, the control unit 7 moves the mirror unit 3 by driving the drive unit 8 so that the second hologram region 42 of the hologram 4 is irradiated from the light emitting unit 2. In the second embodiment, the light emitted from the light sources 2R, 2G, and 2B of the red R, green G, and blue B is incident on the first hologram areas 41R, 41G, and 41B, respectively. , 42B, the mirror unit 3 is moved so as to enter the state.

  In the hologram 4, the first hologram area 41 and the second hologram area 42 may overlap. When the light emitting unit 2 irradiates the portion where the first hologram region 41 and the second hologram region 42 overlap, the incident light is emitted from the first hologram region 41 and the second hologram region 42, respectively.

  Further, the light emitted from the light emitting unit 2 may straddle the first hologram region 41 and the second hologram region 42. When the light emitted from the light emitting unit 2 extends over the first hologram region 41 and the second hologram region 42, the incident light is emitted from the first hologram region 41 and the second hologram region 42, respectively.

  As described above, according to the optical device 1 of the second embodiment, it is possible to provide a color optical device 1 that can be projected and can be manufactured easily and inexpensively with a simple structure.

  Next, an optical device according to a third embodiment will be described.

  FIG. 5 is a perspective view of the optical device according to the third embodiment. FIG. 6 is a front view of a hologram of the optical device according to the third embodiment.

The optical device 1 according to the third embodiment includes a light emitting unit 2, a mirror unit 3 as a region selection unit, a hologram 4, an input unit 5, a control unit 6, a storage unit 7, and a drive unit 8. Prepare.

  The light emitting unit 2 emits coherent laser light having a predetermined wavelength that has directivity and is amplified. The light emitting unit 2 may be a laser array in which a plurality of elements are bundled. The light emitting unit 2 may be capable of irradiating laser beams having a plurality of wavelengths. The light emitting unit 2 of the third embodiment has at least three light sources 2R, 2G, and 2B corresponding to RGB colors.

  The mirror unit 3 changes the region in which the light emitted from the light emitting unit 2 enters the hologram 4 by moving its position. The mirror unit 3 of the second embodiment has a structure in which the side surface is formed in a plane, and the light irradiated by the light emitting unit 2 is reflected on the inclined surface by moving on a plane (not shown) and is incident on different regions of the hologram 4. is there. In the present embodiment, the mirror unit 3 that reflects the light emitted from the light emitting unit 2 is used as the region selection unit. However, the region selection unit may be refracted by a prism or the like.

  The hologram 4 has at least a first hologram area 41 and a second hologram area 42. Different information is recorded in the first hologram area 41 and the second hologram area 42, and when laser light is incident from the light emitting unit 2, light including different information is emitted. For example, the light emitted from the first hologram area 41 and the second hologram area 42 projects different illumination ranges, display images, characters, or the like. As shown in FIG. 6, the hologram 4 of the third embodiment includes a first hologram area 41R, 41G, 41B and a second hologram area corresponding to the three light sources 2R, 2G, 2B of red R, green G, and blue B. 42R, 42G, and 42B are arranged in the vertical direction. The shape of the hologram 40 is not limited to a square but may be a polygon or a circle.

  The input unit 5 is a switch or various sensors operated by an operator, and inputs a detection signal to the control unit 6. For example, when the optical device of this embodiment is applied to a moving body such as an automobile, the input unit 5 includes a headlight switch or an obstacle sensor that detects an obstacle.

  The storage unit 6 stores an area of the hologram 4 corresponding to the input content of the input unit 5. For example, when the optical device of the present embodiment is applied to a moving body such as an automobile, the storage unit 6 sets the first hologram region 41 of the hologram 4 when an instruction to make a high beam is input from the headlight changeover switch. Etc. are remembered. Note that the storage unit 6 may be included in the control unit 7.

  The control unit 7 drives the drive unit 8 in accordance with instructions from the input unit 5 and the storage unit 6. The drive unit 8 includes an actuator that moves the hologram frame portion 4 a of the hologram 4 along the support rail 31 of the support unit 3. For example, the drive unit 8 includes a motor and a ball screw or an electromagnetic solenoid.

  Next, the operation of the optical device 1 according to the third embodiment will be described.

  In order to move from the first state in which the irradiation light 10 is applied to the first light region 11 to the second state in which the irradiation light 10 is applied to the second light region 12, a switching signal is first received from the input unit 5. Input to the control unit 7. The control unit 7 acquires the region of the hologram 4 corresponding to the input content of the input unit 5 from the storage unit 6. Thereafter, the control unit 7 moves the mirror unit 3 by driving the drive unit 8 so that the region of the hologram 4 acquired from the storage unit 6 is irradiated from the light emitting unit 2.

For example, an instruction to project a color image on the second light region 12 from a state in which the display changeover switch of the input unit 5 instructs to project a color image on the first light region 11 as a state before control is performed by the control unit. 7, the control unit 7 acquires a signal stored in the storage unit 6 that the region corresponding to the projection of the color image on the second light region 12 is the second hologram region 42. Then, the control unit 7 moves the mirror unit 3 by driving the drive unit 8 so that the second hologram region 42 of the hologram 4 is irradiated from the light emitting unit 2. In the third embodiment, the light emitted from the RGB light sources 2R, 2G, and 2B enters the first hologram areas 41R, 41G, and 41B, respectively, and enters the second hologram areas 42R, 42G, and 42B. The mirror part 3 is moved so that it may become.

  In the hologram 4, the first hologram area 41 and the second hologram area 42 may overlap. When the light emitting unit 2 irradiates the portion where the first hologram region 41 and the second hologram region 42 overlap, the incident light is emitted from the first hologram region 41 and the second hologram region 42, respectively.

  Further, the light emitted from the light emitting unit 2 may straddle the first hologram region 41 and the second hologram region 42. When the light emitted from the light emitting unit 2 extends over the first hologram region 41 and the second hologram region 42, the incident light is emitted from the first hologram region 41 and the second hologram region 42, respectively.

  As described above, according to the optical device 1 of the third embodiment, it is possible to provide a color optical device 1 capable of projection that can be manufactured easily and inexpensively with a simple structure.

  FIG. 7 is a perspective view of the optical device according to the fourth embodiment.

  In the fourth embodiment, after the lights emitted from the RGB light sources 2R, 2G, and 2B are incident on the first hologram areas 41R, 41G, and 41B and the second hologram areas 42R, 42G, and 42B, respectively, 11R, the first G light region 11G, the first B light region 11B, the second R light region 12R, the second G light region 12G, and the second B light region 12B are projected separately.

  Different information is recorded in each of the first hologram areas 41R, 41G, 41B and the second hologram areas 42R, 42G, 42B. The first R light area 11R, the first G light area 11G, the first B light area 11B, and the second R are recorded. Different images, characters, illumination light, and the like are projected onto the light region 12R, the second G light region 12G, and the second B light region 12B, respectively.

  As described above, according to the optical device 1 of the fourth embodiment, more information can be projected at a time.

  FIG. 8 is a perspective view of the optical device according to the fifth embodiment.

  The number of regions of the hologram 4 may be further increased. In that case, the corresponding position of the mirror unit 3 may be increased.

  For example, as shown in FIG. 8, in the fifth embodiment, light emitted from the light sources 2R, 2G, and 2B of red R, green G, and blue B is respectively applied to the first hologram regions 41R, 41G, 41B, and second. After entering the hologram regions 42R, 42G, and 42B and the third hologram regions 43R, 43G, and 43B, the light is projected onto the first light region 11, the second light region 12, and the third light region 13, respectively.

  In the first hologram area 41, the second hologram area 42, and the third hologram area 43, information of different colors is recorded, and in the first light area 11, the second light area 12, and the third light area 13, Illumination light, images, and characters of different colors are projected.

As described above, according to the present embodiment, the light emitting unit 2 that emits coherent light, and at least information different from the first hologram area 41 and the first hologram area 41 in which predetermined information is recorded are recorded. The hologram 4 having the second hologram region 42 and the mirror unit 3 that moves so that the light emitted from the light emitting unit 2 includes at least one of the first hologram region 41 and the second hologram region 42. Therefore, it is possible to provide a projectable optical apparatus 1 that can be easily and inexpensively manufactured with a simple structure.

  Further, according to the optical device 1 of the present embodiment, the mirror unit 3 moves one-dimensionally, so that the projection content can be quickly switched.

  Further, according to the optical device 1 of the present embodiment, the light emitting unit 2 includes the light sources 2R, 2G, and 2B corresponding to red R, green G, and blue B, and the hologram 4 includes red R, green G, and blue. Since the light sources 2R, 2G, and 2B corresponding to B have regions 41R, 41G, and 41B corresponding to RGB in which information is recorded, it is possible to project in color.

  In addition, according to the optical device 1 of the present embodiment, the light emitting unit 2 includes a laser array having a plurality of laser light sources, and the irradiation area of the laser array is smaller than the first hologram area 41 and the second hologram area 42. Therefore, it is possible to project for each hologram area. In addition, the irradiation area | region of a laser array is an area of the area | region irradiated by a laser array on said hologram area | region.

  Further, according to the optical device 1 of the present embodiment, the input unit 2 that instructs the movement of the mirror unit 3, the drive unit 8 that moves the mirror unit 3, and the drive unit 6 according to the instruction from the input unit 2. Since the control unit 7 is controlled, the projection contents can be switched quickly and accurately according to the input.

  Further, according to the optical device 1 of the present embodiment, the storage unit 6 that stores the movement position of the mirror unit 3 according to the instruction of the input unit 2 is provided, so that the projection content can be switched more quickly and accurately according to the input. Is possible.

  Further, according to the optical device 1 of the present embodiment, the light that has passed through the hologram 4 projects illumination light, so that it is possible to accurately illuminate a predetermined position.

  In addition, since the optical device according to the present invention projects at least one of an image and a character, the light that has passed through the hologram 4 can accurately project predetermined information.

  Although the optical device 1 has been described based on several embodiments, the present invention is not limited to these embodiments, and various combinations or modifications are possible. Moreover, although it demonstrated using the example applied to mobile bodies, such as a motor vehicle, when describing said embodiment, it is not limited to this.

DESCRIPTION OF SYMBOLS 1 ... Optical apparatus 2 ... Light emission part 3 ... Mirror part (area | region selection part)
4 ... Hologram 5 ... Input unit 6 ... Storage unit 7 ... Control unit 8 ... Drive unit

Claims (8)

A light emitting unit that emits coherent light;
A hologram having at least a first hologram area in which predetermined information is recorded and a second hologram area in which information different from the first hologram area is recorded;
A region selector that moves so that light emitted from the light emitting unit includes at least one of the first hologram region and the second hologram region;
An optical device comprising: The optical device according to claim 1, wherein the region selection unit moves one-dimensionally. The light emitting unit has a light source corresponding to red, green, and blue,
The optical device according to claim 1, wherein the hologram has regions corresponding to red, green, and blue in which information is recorded, respectively, for the light sources corresponding to the red, green, and blue. . The light emitting unit is composed of a laser array having a plurality of laser light sources,
4. The optical apparatus according to claim 1, wherein an irradiation area of the laser array is smaller than the first hologram area and the second hologram area. 5. An input unit for instructing movement of the region selection unit;
A drive unit for moving the region selection unit;
A control unit that controls the drive unit in response to an instruction from the input unit;
The optical apparatus according to claim 1, further comprising: The optical apparatus according to claim 1, further comprising a storage unit that stores a movement position of the region selection unit in accordance with an instruction from the input unit. The optical device according to claim 1, wherein the light that has passed through the hologram projects illumination light. The optical apparatus according to claim 1, wherein the light passing through the hologram projects at least one of an image and a character.

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