JP2009271487A - Scanning light projection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scanning light projection device that can facilitate assembling and position control by reducing the number of part items and can effectively reduce the size of an image projection apparatus. <P>SOLUTION: The light projection device comprises a planar actuator, an optical fiber 30 attached to a movable part 12 of the actuator, and a light source 36 connected to the optical fiber 30. The movable part 12 includes a through-hole, and the optical fiber 30 is positioned to the through-hole and fixed to the movable part 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a scanning light projection apparatus using a planar actuator (MEMS element).

Liquid crystal projector devices are widely used as image display devices. In the image display method of the liquid crystal projector device, the light emitted from the light source is demultiplexed into RGB light by a half mirror, the demultiplexed light is synthesized by a cross prism and projected as an image, the RGB light is reflected by a MEMS mirror, There is a method of displaying an image by scanning in a sweeping manner on the screen.
Some MEMS mirrors have a movable part of a planar actuator configured as a mirror. The planar actuator has a configuration in which a movable frame is supported by an outer torsion bar, and a movable part is connected to the inner side of the movable frame via an inner torsion bar whose axial direction is orthogonal to the outer torsion bar.

The operation of the MEMS mirror using a planar actuator consists of forming a wiring in a coil shape on each of the movable frame and the movable part, and arranging a pair of fixed magnets in an arrangement perpendicular to the axial direction of the torsion bar. This is done by tilting the movable part in an arbitrary direction (three-dimensional direction) by controlling energization to the wiring of the movable frame and the movable part in the magnetic field.
Japanese Patent Laid-Open No. 2005-195639 JP 2006-84495 A JP 2006-186243 A

  In recent years, miniaturization of liquid crystal projectors has progressed, and portable liquid crystal projectors are also being studied. In order to reduce the size of the image projection apparatus, a method using a MEMS mirror is more advantageous than a method using a half mirror or a cross prism. However, in the method using the MEMS mirror, it is necessary to accurately control the position of the mirror, and in the method using a very large number of MEMS mirrors for light scanning, there is a problem that the number of parts increases and each mirror is used. There is also a problem that it is difficult to adjust the position.

  The present invention has been made to solve these problems, can reduce the number of parts, can effectively reduce the size of an image projection apparatus such as a liquid crystal projector, and can be influenced by vibration, noise, and the like. An object of the present invention is to provide a suppressed scanning optical projection apparatus.

In order to achieve the above object, the present invention comprises the following arrangement.
That is, a scanning light projection apparatus according to the present invention includes a planar actuator, an optical fiber attached to a movable part of the planar actuator, and a light source connected to the optical fiber, and the movable part has a through hole. And the optical fiber is fixed to the movable part in alignment with the through hole.

Further, as the scanning light projection apparatus, the optical fiber is formed as a single-core optical fiber, the through hole is formed to have a size for inserting a core wire, and the optical fiber is inserted through the through hole, The end face of the coating of the optical fiber may be in contact with the back surface of the movable part and fixed to the movable part.
Further, as the scanning light projection apparatus, the optical fiber is formed as an optical fiber having three core wires for emitting RGB light, and the through hole is formed to have a size for inserting the three core wires. The core wire can be inserted into the through hole, the end face of the optical fiber coating can be brought into contact with the back surface of the movable part, and fixed to the movable part.
Moreover, what was formed as a tape-type optical fiber as said optical fiber can be used.

Further, as a scanning light projection apparatus, the core of the optical fiber is inserted into and supported by a microcapillary, and the optical fiber has an end surface of the microcapillary in contact with a back surface of the movable portion, and the microcapillary is moved to the movable portion. It can fix to and can be set as the structure supported by the said movable part.
The optical fiber is formed as an optical fiber having three core wires that emit RGB light, and the microcapillary is provided with an insertion hole through which the three core wires are inserted. Can be configured.
In addition, since the optical fiber is formed as an optical fiber having a collimating function, parallel light is emitted from the optical fiber, and an image can be suitably displayed.

  Further, as the planar actuator, a movable part to which the optical fiber is attached, a first torsion bar that supports the movable part to be tiltable on the movable frame, and a movable frame that is tiltably supported to the fixed frame, One torsion bar preferably includes a second torsion bar whose axial direction intersects perpendicularly, and a pair of fixed magnets arranged at axial positions of the first torsion bar and the second torsion bar, respectively. Used for.

  The planar actuator is a uniaxial actuator including a movable part to which the optical fiber is attached and a torsion bar that supports the movable part to be tiltable on a support frame, and is supported by the planar actuator. An optical system that reciprocates in parallel with the axial direction of the torsion bar that supports the movable portion is disposed in the optical path of the light projected from the optical fiber. By combining a uniaxial planar actuator and an optical system that reciprocates parallel to the axial direction of the torsion bar, an image can be displayed in a plane. A general optical lens is used as the optical system. In addition, reciprocating the optical system means including a linear reciprocating motion and a rotating motion around an axis.

  The scanning light projection apparatus according to the present invention supports the optical fiber on the movable part of the planar actuator, and scans and emits the emitted light from the optical fiber in accordance with the movable operation of the movable part, thereby allowing an image to be projected on the screen. Can be displayed. By adopting a structure in which the optical fiber is fixed to the movable part of the planar actuator, the device configuration can be simplified and the device can be effectively downsized.

Embodiments of a scanning light projector according to the present invention will be described below with reference to the accompanying drawings.
(First embodiment)
FIG. 1 shows a state in which the scanning light projector is viewed from the plane direction. The scanning light projector 10 is configured by attaching an optical fiber to a planar actuator.
The planar actuator includes a movable portion 12 that supports the optical fiber 30, first torsion bars 14 a and 14 b that support the movable portion 12 so as to be tiltable on the movable frame 16, and a movable frame 16 that is tiltably supported on the fixed frame 20. Second torsion bars 18a and 18b.

  The movable part 12 is formed in a square planar shape and is arranged inside a movable frame 16 formed in a square frame shape. The first torsion bars 14 a and 14 b extend toward the movable frame 16 at right angles to the side direction at the center positions of the two opposing sides of the movable unit 12, and connect the movable frame 16 and the movable unit 12. To do. The first torsion bars 14a and 14b have a certain elasticity, and the movable portion 12 can tilt around the axis of the first torsion bars 14a and 14b with the first torsion bars 14a and 14b as support axes. .

The movable frame 16 is arranged inside the fixed frame 20 formed in a square frame shape, and the second torsion bars 18 a and 18 b connect the movable frame 16 to the fixed frame 20. The second torsion bars 18 a and 18 b are arranged at right angles to the side direction at the center positions in the side direction of the two opposite sides of the movable frame 16. The second torsion bars 18a and 18b have a certain elasticity, and the movable frame 16 can be tilted around the axes of the second torsion bars 18a and 18b with the second torsion bars 18a and 18b as support axes.
The axial direction of the second torsion bars 18a, 18b is arranged perpendicular to the axial direction of the first torsion bars 14a, 14b, that is, the first torsion bars 14a, 14b and the second torsion bars 18a, 18b. The arrangement is such that the axial directions intersect perpendicularly.
The movable portion 12, the first torsion bars 14a and 14b, the movable frame 16, the second torsion bars 18a and 18b, and the fixed frame 20 are integrally formed using a silicon substrate in the present embodiment. .

  The fixed frame 20 is supported by a support frame 40 made of a flat plate, and fixed magnets 22 a, 22 b, 24 a, 24 b are fixed on the support frame 40 extending outward from the side edges of the fixed frame 20. One fixed magnet 22a, 22b is arranged on the axis of the second torsion bars 18a, 18b with the direction of the magnetic pole perpendicular to the axis direction of the first torsion bars 14a, 14b. The other fixed magnets 24a and 24b are arranged on the axis of the first torsion bars 14a and 14b with the magnetic poles perpendicular to the axis direction of the second torsion bars 18a and 18b.

The movable portion 12 and the movable frame 16 are formed with a wiring 26 and a wiring 28 in a shape of being wound in a loop shape along respective outer edge portions. The wirings 26 and 28 are connected to terminals 26a and 28a provided on the fixed frame 20 via the first and second torsion bars 14a, 14b, 18a and 18b.
As described above, when the wirings 26 and 28 are energized, the movable portion 12 and the movable frame 16 are moved to the first torsion bar 14a, by the action (Lorentz force) of the static magnetic field of the fixed magnets 22a, 22b, 24a, and 24b. 14b and the second torsion bars 18a, 18b are tilted.
Energization of the wirings 26 and 28 is performed from the terminals 26a and 28a. By reversing the energization direction to the wirings 26 and 28, the tilting directions of the movable portion 12 and the movable frame 16 are reversed.

  The action of the movable part 12 and the movable frame 16 tilting with the first and second torsion bars 14a, 14b, 18a, 18b as support axes is an action of the movable part 12 tilting with two axes that intersect perpendicularly as fulcrums. This means that the movable part 12 tilts in an arbitrary direction three-dimensionally. The amount of tilting (tilting angle) of the movable portion 12 and the movable frame 16 is variable depending on the current (energization amount) to the wirings 26 and 28, and can be arbitrarily controlled in any direction by controlling the amount of energization to the wirings 26 and 28. The movable part 12 can be tilted at an angle of.

  FIG. 2 is a sectional view taken along line AA in FIG. In order to attach the optical fiber 30 to the movable portion 12, a through hole 12 a is formed at the center of the movable portion 12, the core wire 31 of the optical fiber 30 is inserted into the through hole 12 a, and the optical fiber 30 is bonded to the back surface of the movable portion 12 with an adhesive 34. Fix it. By inserting the core wire 31 through the through-hole 12a, the exposed portion (bearing portion 31a) of the core wire 31 extends from the through-hole 12a, and the end surface of the coating 32 of the optical fiber 30 comes into contact with the back surface of the movable portion 12, thereby moving the movable portion. The optical fiber 30 is positioned and fixed to 12.

In this embodiment, an optical fiber having an outer diameter of 125 μm of the core wire 31 and an outer diameter of 250 μm of the coating 32 is used. The diameter of the through hole 12a provided in the movable part 12 is 0.2 mm, and the length of the bare part 31a extending from the movable part 12 is 6 mm.
A light source 36 is connected to the other end of the optical fiber 30. In this embodiment, an optical fiber 30 formed as a microcollimator is used. Thereby, the light from the light source 36 is emitted as parallel light from the end face of the bare portion 31a. When the length of the bare part 31a is set in order to give the function of the collimator, the bare part 31a having a specified length is extended.

FIG. 3 is a sectional view taken along line BB in FIG. The fixed frame 20 is supported by the support frame 40, and the fixed magnets 22 a and 22 b are supported on the support frame 40. The other fixed magnets 24a and 24b are similarly supported by the support frame 40.
As shown in FIG. 2, the distal end portion of the optical fiber 30 is supported by the movable portion 12, and the proximal end side is drawn out from the support frame 40 toward the light source 36. FIG. 3 shows a state where the movable part 12 swings.

As described above, the movable portion 12 includes the first torsion bars 14a and 14b and the second torsion bar by the electromagnetic action caused by the static magnetic field generated by the fixed magnets 22a, 22b, 24a, and 24b and the energization of the wirings 26 and 28. It can tilt with the support shafts 18a and 18b. The optical fiber 30 tilts integrally with the movable portion 12 as the movable portion 12 tilts.
The optical fiber 30 is disposed so as not to hinder the tilting operation of the movable portion 12. Since the optical fiber 30 is sufficiently flexible, the tilting operation of the movable part 12 is not hindered. FIG. 3 shows a state where the optical fiber 30 is tilted with the tilting of the movable portion 12.

FIG. 4 shows a state in which an image is projected using the scanning light projector 10 of the present embodiment. When the maximum tilt angle of the movable portion 12 is about 34 °, if the distance between the scanning light projector 10 and the screen 50 is set to 50 cm, the projection range of the image on the screen 50 is about 30 cm. When used in a small liquid crystal projector or the like, this level of projection area is sufficient for practical use. It is not particularly difficult to set the maximum tilt angle of the movable portion 12 to around 35 °.
In the scanning light projector 10 of the present embodiment, light is emitted from the optical fiber 30 and an image is displayed on the screen 50. Therefore, by controlling the light (monochromatic light, RGB light) emitted from the optical fiber 30, any Images can be displayed.

  When displaying an image in color, when the red (R), green (G), and blue (B) light is emitted from the optical fiber 30 while the movable part 12 is tilted (moved), the arrival position of the RGB light on the screen 50 is It will shift slightly. By setting the pixel size so that the RGB light arrival positions at each pixel on the screen 50 overlap, and by not making the screen size too large, the problem of color blur and clarity Avoided.

  In addition, as another method for color display, three sets of scanning light projectors combining the above-described planar actuator and optical fiber are used, and red (R), green (G), blue are used from each of the scanning light projectors. (B) While emitting light, it is also possible to display an image at the timing of projecting light according to each pixel.

FIG. 5 shows another method of attaching the optical fiber 30 to the movable part 12.
In the embodiment described above, the optical fiber 30 is attached to the movable portion 12 by bonding the coating 32 of the optical fiber 30 to the movable portion 12. In this embodiment, the core wire 31 of the optical fiber 30 is inserted into the microcapillary 35, and the optical fiber 30 is attached to the movable portion 12 while protecting the core wire 31 with the microcapillary 35.

The microcapillary 35 is made of a member having shape retaining property such as glass, and the microcapillary 35 is provided with an insertion hole through which the core wire 31 is inserted so as to penetrate in the axial direction. The core wire 31 is inserted into the insertion hole of the microcapillary 35, the end surface of the coating 32 of the optical fiber 30 is brought into contact with the rear end surface of the microcapillary 35, and the microcapillary 35 and the optical fiber 30 are connected and fixed by an adhesive 37. The connection between the microcapillary 35 and the movable part 12 is also performed by adhesion and fixing with the adhesive 34.
The distal end portion of the core wire 31 inserted through the microcapillary 35 may protrude from the through hole 12a, may coincide with the opening end position of the through hole 12a, or may be positioned in the through hole 12a.

  According to the configuration of the present embodiment, the core wire 31 of the optical fiber 30 is supported so as to be protected by the microcapillary 35, thereby avoiding the problem that the bare portion 31a of the core wire 31 is damaged when the movable portion 12 vibrates. can do. Further, when the coating 32 of the optical fiber 30 is bonded and fixed to the movable portion 12, it is possible to prevent the attachment portion of the optical fiber 30 to the movable portion 12 from being damaged.

  In the above embodiment, when the optical fiber 30 is attached to the movable portion 12, the end surface of the coating 32 of the optical fiber 30 is brought into contact with the back surface of the movable portion 12, or the microcapillary 35 is brought into contact with the back surface of the movable portion 12. However, the method of attaching the optical fiber 30 to the movable part 12 is not limited to these methods. For example, a step recess for positioning the end face of the covering 32 or the microcapillary 35 is provided on the back surface of the movable portion 12, and the covering 32 or the microcapillary 35 is positioned and bonded and fixed to the movable portion 12. The diameter of the coating 32 or the microcapillary 35 can be inserted, and the optical fiber 30 can be inserted into the through hole 12a together with the coating 32, or the microcapillary 35 itself can be inserted into the through hole 12a to move the coating 32, the movable portion 12, and the microcapillary 35. It is also possible to adopt a configuration in which the portion 12 is bonded and fixed.

(Second Embodiment)
FIG. 6 shows an example of a scanning light projection apparatus formed by attaching an optical fiber 30 a having three RGB core wires to the movable portion 12. FIG. 6A shows a state in which the optical fiber 30 a is attached to the movable portion 12 using the microcapillary 38. 6B is a perspective view of the microcapillary 38, and FIG. 6C shows a state in which the RGB core wires 31R, 31G, and 31B are inserted into the microcapillary 38 as viewed from the end face direction of the microcapillary 38. FIG.

  As shown in FIG. 6B, the microcapillary 38 is formed with an insertion hole 38a for inserting three core wires in parallel. In the present embodiment, three core wires are inserted in parallel into the insertion hole 38 a, the end surface of the coating 32 of the optical fiber 30 a is brought into contact with the rear end surface of the microcapillary 38, and the microcapillary 38 and the coating 32 are bonded by the adhesive 37. Adhere and fix.

  The microcapillary 38 is bonded and fixed to the movable portion 12 with the adhesive 34 in a state where the core wires 31R, 31G, and 31B are inserted into the through holes 12a of the movable portion 12. The end faces of the core wires 31R, 31G, and 31B may protrude slightly forward from the opening edge of the through-hole 12a, or the positions of the opening edges of the through-hole 12a coincide with each other, or the inside of the through-hole 12a. You may arrange | position so that the end surface of a core wire may be located in this.

  FIG. 7 shows an example in which a scanning optical projector is configured by attaching a tape-type optical fiber 30b having three RGB RGB core wires to the movable portion 12. In FIG. The tape-type optical fiber 30b is formed by connecting the coatings 32R, 32G, and 32B of the core wires 31R, 31G, and 31B in parallel. A through-hole 12a having a long front shape is formed in the movable portion 12, the core wires 31R, 31G, and 31B are inserted into the through-hole 12a, and the optical fibers 30b are aligned with the movable portion 12 so that the coverings 32R, 32G, and 32B are placed. Is fixed to the movable part 12 by an adhesive 34.

When the optical fiber 30b having three core wires of RGB is used, the light sources 36R, 36G, and 36B are individually connected to the core wires 31R, 31G, and 31B, and the light emitted from the light sources 36R, 36G, and 36B is individually supplied. Control. The same applies to the case where the three core wires 31R, 31G, and 31B are attached using the microcapillary 38 (FIG. 6).
By controlling the light emission from the light sources 36R, 36G, and 36B, the color display of the pixel position displayed by the light emitted from the three core wires 31R, 31G, and 31B is determined. Accordingly, the image can be displayed in color on the screen by scanning the light emitted from the core wires 31R, 31G, and 31B on the screen while the movable portion 12 is tilted.

With the optical fibers 30a and 30b attached to the movable part 12, the arrangement positions of the core wires 31R, 31G, and 31B are slightly deviated from each other, so that the light emitted from the core wires 31R, 31G, and 31B onto the screen reaches The position is slightly displaced. If the distance from the light emission position to the screen is about several tens of centimeters, the problem that the image becomes unclear due to the shift of the light arrival position is avoided.
When it is a problem that the sharpness of the image is lowered due to the deviation of the arrangement positions of the core wires 31R, 31G, and 31B, the emitted light from the core wires 31R, 31G, and 31B is overlapped. This can be avoided by adjusting the spot size of the emitted light or adjusting the direction of the core wires 31R, 31G, and 31B attached to the movable portion 12 so that the arrival positions of the emitted light coincide with each other.

  As described in the first embodiment and the second embodiment described above, the scanning optical projection apparatus according to the present invention uses a planar actuator (MEMS) using electromagnetic acting force, and is a planar type. An optical fiber is attached to the movable part of the actuator, and an image is displayed by scanning light emitted from the optical fiber. Although the planar type actuator of the above-mentioned embodiment supports the movable part by two axes, it can be configured to support the movable part by one axis.

  When the movable part of the planar actuator is supported by one axis, an image appears in a line shape. In order to support the movable part of the planar actuator by one axis and to display an image on a plane, the light projected from the optical fiber 30 at the front position of the planar actuator 60, as shown in FIG. And the lens 70 may be reciprocated in parallel with the axial direction of the support shaft of the movable portion 12 of the planar actuator 60.

As the planar actuator 60, for example, the movable portion 12 may be fixed to the support frame 62 via the torsion bar 61, and the planar actuator 60 may be connected to the control power source 64. In this case, the fixed magnet is disposed perpendicular to the axial direction of the torsion bar 61.
The configuration in which the movable portion 12 is provided with a through hole and the optical fiber 30 is attached to the through hole is the same as in the above-described embodiment. By setting the axial direction of the torsion bar 61 to the horizontal direction, the emitted light from the optical fiber 30 is radiated in a vertical direction over a predetermined angle range.

  For example, a piezo element can be used as a drive unit that reciprocally drives the lens 70. The piezo element is connected to the drive power source 72, and the lens 70 is reciprocated in parallel with the axial direction of the torsion bar 61 of the movable portion 12, that is, in the horizontal direction. By reciprocating the lens 70 in the horizontal direction, light incident on the lens 70 is radiated over a predetermined angular range in the horizontal direction.

  By moving the movable part 12 in a swinging manner and reciprocatingly driving the lens 70, an image is displayed on the screen 50 across a predetermined vertical and horizontal range. In the configuration of the scanning light projector shown in FIG. 8, the distance between the lens 70 and the screen 50 is 50 cm, the deflection angle α of radiation emitted by the movable unit 12 supporting the optical fiber 30 is 12.6 degrees, and the light emitted from the lens 70. When the deflection angle β is 6.3 degrees, an image of 10 cm in the vertical direction and 5 cm in the horizontal (horizontal) direction is displayed on the screen 50. If it is a portable light projection apparatus, even this angle of view is sufficiently practical.

When an image is actually displayed on the screen 50, the image is displayed by scanning at a predetermined frequency in the vertical direction and the horizontal direction. When displaying an image in color, the RGB light sent from the light source 36 to the optical fiber 30 may be controlled as in the above-described embodiment.
In the embodiment shown in FIG. 8, the support shaft of the movable portion 12 is set in the horizontal direction and the movable portion 12 is swung around the horizontal axis. However, the support shaft of the movable portion 12 is set in the vertical direction, and the movable portion is moved. 12 may be swung around a vertical axis. In this case, the lens 70 is reciprocated in the vertical direction. That is, it is sufficient that the moving direction of the movable portion 12 and the moving direction of the lens 70 are orthogonal to each other, and the arrangement is not limited.

  In the above embodiment, the image is displayed on the surface by linearly reciprocating the lens 70. However, the lens 70 is rotated around an axis in a direction perpendicular to the support shaft of the movable shaft 12 (predetermined). By rotating back and forth within an angle range) or rotating (rotating in one direction), the image can be displayed on a surface by moving the light in a direction orthogonal to the moving direction of the light by the movable portion 12. Although FIG. 8 shows an example in which one lens 70 is used, an optical system composed of a plurality of lenses can be used instead of one lens.

  As an example of use in which light is radiated in a line shape with the movable part of the planar actuator as one axis, there is an example in which the bar code is radiated in a line shape to read the barcode. When reading the entire barcode in a plane, a method of emitting light in a plane as described above may be used. In the case where light is emitted in a narrow range of field of view such as a barcode, the above-described optical projection device using an optical fiber can be suitably used.

Further, in the optical projection device using the optical fiber of the present invention, since the image is projected by directly scanning the light emitted from the optical fiber, the light is once reflected by the mirror like the mirror type optical projection device. Compared with the scanning method, the optical configuration is simplified, and it is not necessary to secure a light reflection space. Therefore, the apparatus can be effectively downsized.
Further, according to the method using an optical fiber, it is not necessary to use a large number of MEMS elements as in the case of a mirror-type light projection apparatus, and the difficulty of adjusting the orientation of each mirror can be solved. Further, by combining an optical fiber having a small diameter with a planar actuator, an operation of scanning light can be easily performed. In addition, in the case of the mirror type, it is necessary to secure the required area by using the movable part of the planar actuator as a mirror. However, in the case of the present invention, it is only necessary to secure an area for attaching the optical fiber. It is. In addition, since the light projection apparatus of the present invention only drives a single optical fiber to tilt, there is an advantage that problems such as vibration and noise during operation can be suppressed.

It is a top view which shows the structure of one Embodiment of a scanning light projector. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is explanatory drawing which shows the principle which displays an image using a scanning light projector. It is sectional drawing of the example which assembled the scanning type | mold optical projection apparatus using the microcapillary. FIG. 4 is a perspective view (b) and an end face part (c) showing the configuration of a scanning light projection apparatus (a) assembled using an optical fiber having three core wires of RGB, and a microcapillary used therefor. It is explanatory drawing which shows the example which assembled the scanning light projector using the tape-type optical fiber. It is explanatory drawing which shows the structure of the optical projector which combined the planar type | mold actuator and the lens.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Scanning type light projector 12 Movable part 12a Through hole 14a, 14b First torsion bar 18a, 18b Second torsion bar 16 Movable frame 20 Fixed frame 22a, 22b, 24a, 24b Fixed magnet 26, 28 Wiring 30, 30a , 30b Optical fiber 31, 31R, 31G, 31B Core wire 31a Bare part 32, 32R, 32G, 32B Cover 34, 37 Adhesive 35, 38 Microcapillary 36, 36R, 36G, 36B Light source 38a Insertion hole 40 Support frame 50 Screen 60 Planer Type actuator 62 Support frame 70 Lens

Claims (9)

A planar actuator, an optical fiber attached to a movable part of the planar actuator, and a light source connected to the optical fiber,
The movable part is provided with a through hole,
The scanning optical projection apparatus, wherein the optical fiber is fixed to the movable portion in alignment with the through hole. The optical fiber is formed as a single-core optical fiber,
The through-hole is formed in a size for inserting the core wire,
2. The scanning according to claim 1, wherein the optical fiber is fixed to the movable portion by inserting the core wire into the through-hole and abutting an end surface of the coating of the optical fiber on a back surface of the movable portion. Type light projection device. The optical fiber is formed as an optical fiber having three core wires for emitting RGB light,
The through hole is formed to have a size for inserting the three core wires,
2. The scanning according to claim 1, wherein the optical fiber is fixed to the movable portion by inserting the core wire into the through-hole and abutting an end surface of the coating of the optical fiber on a back surface of the movable portion. Type light projection device.   4. The scanning light projector according to claim 3, wherein the optical fiber is formed as a tape-type optical fiber. The optical fiber core wire is inserted and supported through a microcapillary,
2. The optical fiber according to claim 1, wherein an end surface of the microcapillary is brought into contact with a back surface of the movable part, the microcapillary is fixed to the movable part, and is supported by the movable part. Scanning light projector. The optical fiber is formed as an optical fiber having three core wires for emitting RGB light,
6. The scanning light projection apparatus according to claim 5, wherein the microcapillary is provided with an insertion hole through which the three core wires are inserted.   The scanning optical projection apparatus according to claim 1, wherein the optical fiber is formed as an optical fiber having a collimating function.   The planar actuator includes a movable part to which the optical fiber is attached, a first torsion bar that supports the movable part to be tiltable to the movable frame, and a movable frame that is tiltably supported to the fixed frame. The torsion bar includes a second torsion bar whose axial direction intersects perpendicularly, and a pair of fixed magnets arranged at axial positions of the first torsion bar and the second torsion bar, respectively. The scanning light projector according to claim 1. The planar actuator is a uniaxial actuator including a movable part to which the optical fiber is attached and a torsion bar that supports the movable part to be tiltable on a support frame.
An optical system that reciprocates in parallel with the axial direction of a torsion bar that supports the movable part is disposed in an optical path of light projected from an optical fiber supported by the planar actuator. The scanning optical projector according to any one of 1 to 7.