WO2007077932A1

WO2007077932A1 - Optical device and image display device

Info

Publication number: WO2007077932A1
Application number: PCT/JP2006/326265
Authority: WO
Inventors: Mitsugi Tanaka
Original assignee: Brother Kogyo Kabushiki Kaisha
Priority date: 2005-12-28
Filing date: 2006-12-28
Publication date: 2007-07-12
Also published as: JP2007178944A

Abstract

Provided are a optical device (100) that is compact in size and where the accuracy of positioning of optical members is secured, and an image display device (1) having the optical device (100). The optical device (100) bends a light flux by optical members (19a, 21a, 102, 104, 106, 108) and has wall surfaces (51a’, 51b’, 51c’, 51d’, 51e’, 51f’, 51g’, 51h’, 51x’) arranged surrounding the bent light flux.

Description

Specification

Optical device and image display device

Technical field

The present invention relates to an optical device that bends a light beam by an optical member, and a retinal scanning type and screen scanning type image display device having the optical device.

Background art

Conventionally, an image display device or the like for displaying an image includes an optical device that includes an optical member such as a mirror and bends a light flux. The optical device has a support structure that supports the optical device. However, the conventional support structure supports the optical member by a so-called cantilever from below, or supports the optical member so as to be sandwiched from above and below. It was something.

Disclosure of the invention

Problems to be solved by the invention

[0003] However, in an optical device, although the optical member is required to have a high level of positioning accuracy, it is difficult to secure the accuracy of the structure that supports the optical member by cantilevering. There is a problem that.

[0004] The structure that supports the optical member so as to be sandwiched from above and below has a high positioning accuracy of the optical member, but the size in the height direction must be increased by the thickness of the member that sandwiches the optical member from above and below. If the optical device is not enlarged and the size of the optical device is increased, there is a problem.

[0005] Further, in order to ensure positioning accuracy, it is necessary to provide a protrusion or the like for positioning the optical member on such a member. The effective optical range of the optical member is reduced by the same size. Therefore, in order to obtain such an effective range sufficiently, it is necessary to increase the height of the optical member, which leads to an increase in the size of the optical member.

The present invention has been made in view of the above-described problems, and an object thereof is to provide an optical device that secures the positioning accuracy of an optical member while suppressing an increase in size, and an image display device having the optical device. And Means for solving the problem

In order to achieve the above object, according to one aspect of the present invention, an optical device that bends a light beam by an optical member, and has a wall surface provided so as to surround the bent light beam. It is in the optical apparatus characterized by the above. According to such a configuration, the optical path is formed by folding the light beam, so that the enlargement can be suppressed and the positioning accuracy of the optical member can be ensured by the wall surface. An apparatus can be provided.

[0008] In order to achieve the above object, according to another aspect of the present invention, the wall surface includes an exit wall surface from which the light flux exits, and a plurality of adjacent wall surfaces adjacent to the exit wall surface. The adjacent wall surface supports the optical member. According to this configuration, by folding the light beam with the optical member supported on the adjacent wall surface adjacent to the output wall surface and emitting the light beam from the output wall surface, the optical path is formed by folding the light beam, It is possible to provide an optical device with excellent optical characteristics that can further suppress the increase in size and can maintain the positioning accuracy of the optical member by the wall surface.

[0009] In order to achieve the above object, according to another aspect of the present invention, the wall surface has at least one of an incident wall surface on which the light beam is incident and an output wall surface on which the light beam is emitted. I did it. According to the cover structure, it is possible to suppress the enlargement by forming the optical path so that the light beam is folded by making the light beam enter from the incident wall surface or by emitting the light beam from the output wall surface, It is possible to provide an optical device with excellent optical characteristics that can maintain the positioning accuracy of the optical member by the wall surface.

[0010] In order to achieve the above object, according to another aspect of the present invention, the wall surface includes an incident wall surface on which the light beam is incident and an output wall surface on which the light beam is emitted, The incident wall surface and the exit wall surface were made to face each other. According to the configuration, the incident wall force light beam facing each other is incident and the output wall force force is formed so that the light beam is folded in such a manner that the light beam is emitted. It is possible to provide an optical device with excellent optical characteristics that can ensure the positioning accuracy of the optical member by the wall surface.

[0011] In order to achieve the above object, according to another aspect of the present invention, against the wall surface, And a position adjusting means for positioning the optical member. According to such a configuration, it is possible to provide an optical device having excellent optical characteristics that can ensure the positioning accuracy of the optical member by the wall surface and the position adjusting means.

[0012] In order to achieve the above object, according to another aspect of the present invention, the wall surface is perpendicular to a reference surface formed by the bent light flux. According to such a configuration, it is possible to provide an optical device with excellent optical characteristics that can ensure the positioning accuracy of the optical member by preventing the optical member from being tilted by the wall surface perpendicular to the reference surface.

In order to achieve the above object, according to another aspect of the present invention, the optical members are arranged symmetrically in a direction perpendicular to the reference plane. According to the configuration, the optical member can be prevented by better preventing the surface of the optical member from being tilted by arranging the optical member symmetrically in the direction perpendicular to the reference surface on the wall surface perpendicular to the reference surface. It is possible to provide an optical device with excellent optical characteristics that can guarantee the positioning accuracy of

[0014] In order to achieve the above object, according to another aspect of the present invention, the member having the wall surface is made of resin. A wall surface can be easily formed into a desired size and shape as needed, and an optical device with excellent optical characteristics can be provided that can ensure the positioning accuracy of the optical member by the wall surface. .

[0015] In order to achieve the above object, according to another aspect of the present invention, the inner surface of the wall surface is black. According to the powerful configuration, it is possible to provide an optical device with excellent optical characteristics that can secure the positioning accuracy of the optical member by the wall surface and can prevent a ghost phenomenon or the like.

In order to achieve the above object, according to another aspect of the present invention, a first scanning system that includes the optical member and scans the light beam, and a direction that intersects the first scanning system And a second scanning system for scanning, and any one of the scanning planes of these scanning systems is perpendicular to the wall surface. According to the powerful configuration, it is possible to provide an optical device with excellent optical characteristics that can ensure the positioning accuracy of the optical member by the wall surface perpendicular to the scanning surface. [0017] In order to achieve the above object, according to another aspect of the present invention, a support member that forms the wall surface and supports the optical member is provided. According to the powerful configuration, it is possible to provide an optical device having excellent optical characteristics that can ensure the positioning accuracy of the optical member by the wall surface formed by the support member.

[0018] In order to achieve the above object, according to another aspect of the present invention, the support member is solid. According to such a configuration, it is possible to provide an optical device having excellent optical characteristics that can ensure the positioning accuracy of the optical member by the wall surface formed by the solid support member having excellent strength.

In order to achieve the above object, according to another aspect of the present invention, the optical member is supported on the wall surface. According to the powerful configuration, it is possible to provide an optical device having excellent optical characteristics, in which the optical member can be accurately positioned by the wall surface formed by the solid support member having excellent strength.

[0020] In order to achieve the above object, according to another aspect of the present invention, there is provided positioning means for engaging and positioning the optical member on the wall surface supporting the optical member. did. According to the strong configuration, it is possible to provide an optical device capable of positioning the optical member with higher accuracy by the positioning means on the wall surface formed by the solid support member having excellent strength.

[0021] In order to achieve the above object, according to another aspect of the present invention, there is provided a holding member for holding the support member, and the support member has a wall portion having the wall surface as an outer surface thereof. I did it. According to the powerful configuration, it is possible to suppress an increase in size, and it is possible to secure the positioning accuracy of the optical member by the wall surface formed by the wall portion of the support member held by the holding member. An excellent optical device can be provided.

[0022] In order to achieve the above object, according to another aspect of the present invention, a plurality of the wall portions are provided, all of which are adjacent to the other plurality of wall portions or the holding member. I made it. According to such a configuration, it is possible to suppress an increase in size, and it is possible to ensure the positioning accuracy of the optical member by the wall surface formed by the wall portion of the high-strength support member held by the holding member. An optical device having excellent optical characteristics can be provided.

[0023] In order to achieve the above object, according to another aspect of the present invention, the wall portion and the The holding member constitutes a box shape surrounding the bent light flux. According to the configuration, the increase in size can be suppressed, and the positioning accuracy of the optical member can be further secured by the wall surface formed by the wall portion of the supporting member having high strength held by the holding member. It is possible to provide an optical device that is superior in optical characteristics.

In order to achieve the above object, according to another aspect of the present invention, the optical member is supported on the wall portion. According to this configuration, it is possible to provide an optical device having excellent optical characteristics that can accurately position the optical member by the wall surface formed by the wall portion of the support member held by the holding member.

[0025] In order to achieve the above object, according to another aspect of the present invention, there is provided positioning means for engaging and positioning the optical member with the wall portion supporting the optical member. I made it. According to the powerful configuration, an optical device having further excellent optical characteristics can be provided in which the optical member can be positioned with higher accuracy by the positioning means on the wall surface formed by the wall portion of the support member held by the holding member. be able to.

[0026] In order to achieve the above object, according to another aspect of the present invention, the thickness and Z or height of the wall portion supporting the optical member are set according to the optical element supported. I tried to do it. According to such a configuration, an optical device having excellent optical characteristics that can accurately position an optical member according to its shape and size by a wall surface formed by a wall portion of a support member held by a holding member. Can be provided.

In order to achieve the above object, according to another aspect of the present invention, the thickness of the wall portion supporting the optical member is set so that the optical path length of the light flux becomes a desired optical path length. Set. According to such a configuration, the wall surface formed by the wall portion of the support member held by the holding member can be positioned so as to form a desired optical path length without using a jig or the like that makes the optical member accurate. An optical device having excellent optical characteristics can be provided.

[0028] In order to achieve the above object, according to another aspect of the present invention, the wall portion supporting the optical member supports the optical member on the outer wall surface, and An opening that transmits the light beam bent by the optical member is provided. According to such a configuration, the luminous flux formed by the wall portion of the support member held by the holding member is reduced. It is possible to provide an optical device having excellent optical characteristics, in which an optical member can be positioned accurately and easily by a wall surface having a transparent opening.

In order to achieve the above object, according to another aspect of the present invention, the optical member supported by the wall surface outside the wall portion is a reflecting member that reflects the light flux. did. According to this configuration, the optical surface as the reflecting member is formed by the wall surface having the opening that transmits the incident / reflected light to the optical member that is the reflecting member, which is formed by the wall portion of the supporting member held by the holding member. It is possible to provide an optical device excellent in optical characteristics, which can accurately and easily position a member.

[0030] Further, in order to achieve the above object, according to another aspect of the present invention, the peripheral force of the opening is formed to have a tapered shape that is expanded toward the inside of the wall portion having the opening. . According to the construction, the opening that is formed by the wall portion of the support member held by the holding member and transmits the light beam, and its peripheral edge is tapered so that the strength of the wall portion is increased. It is possible to provide an optical device with further excellent optical characteristics in which the optical member can be positioned more accurately and easily by the wall surface having the opening that can be formed.

[0031] In order to achieve the above object, according to another aspect of the present invention, the wall portion having the opening supports the supported optical member at a plurality of locations. According to such a configuration, the optical member is supported at a plurality of locations by the wall surface having the opening that transmits the light beam, which is formed by the wall portion of the support member held by the holding member, so that it can be performed more accurately and easily. It is possible to provide an optical device that can be positioned and has further excellent optical characteristics.

In order to achieve the above object, according to another aspect of the present invention, the opening force is made smaller than the optical member supported by the wall portion having the opening. According to such a configuration, the optical member can be accurately and easily positioned by the wall surface having the opening that reliably transmits the light beam, which is formed by the wall portion of the support member held by the holding member. An optical device having excellent characteristics can be provided.

[0033] In order to achieve the above object, according to another aspect of the present invention, the wall portion can be attached to and detached from the other wall portion. According to the powerful configuration, the enlargement can be suppressed. In addition, an optical device that is easy to assemble and has excellent optical characteristics that can secure the positioning accuracy of the optical member by the wall surface formed by the wall portion of the support member having high strength that is held by the holding member. Can do.

[0034] In order to achieve the above object, according to another aspect of the present invention, a first box-shaped part including the wall part detachably attached to the other wall part, and the other A second box-shaped portion including a wall portion, and the first box-shaped portion is attachable to and detachable from the second box-shaped portion. According to the strong structure, the enlargement can be suppressed, and the positioning accuracy of the optical member can be secured by the wall surface formed by the wall portion of the supporting member having a high strength that is held by the holding member. Since the strength of each part is high, the positioning accuracy of the optical member can be secured at a high level, and an optical device that is easy to assemble and has excellent optical characteristics can be provided.

[0035] Further, in order to achieve the above object, according to another aspect of the present invention, at least the wall portion and the holding member are provided so as to surround the entire circumference of the bent light beam. . According to the powerful configuration, it is possible to suppress an increase in size and to ensure the positioning accuracy of the optical member by the wall surface formed by the wall portion of the supporting member having high strength that is held by the holding member. In addition, stray light does not leak to the outside due to the annular wall, especially when this is mounted on a retinal scanning image display device, unexpected light is incident on the observer's eyes. It is possible to prevent the image quality of the image recognized by the camera from being deteriorated or lowered, and to provide an optical device having excellent optical characteristics.

In order to achieve the above object, according to another aspect of the present invention, there is provided a retinal scanning type image display apparatus that projects and displays an image formed by the light beam on the retina of an eye. Any one of the optical devices described above is provided. According to the powerful configuration, the optical path is formed by folding the light beam, so that the enlargement can be suppressed, and the positioning accuracy of the optical member can be ensured by the wall surface. It is possible to provide an image display device having particularly excellent characteristics for a network scanning image display device.

[0037] Further, in order to achieve the above object, according to another aspect of the present invention, there is provided a screen scanning type image display device that projects and displays an image formed by the light beam on a screen. Any one optical device was provided. According to the powerful configuration, the luminous flux For the retinal scanning image display device with excellent optical characteristics, the optical path can be folded so that the enlargement can be suppressed and the positioning accuracy of the optical member can be secured by the wall surface. An image display device having excellent characteristics can be provided.

The invention's effect

[0038] According to the present invention, there is provided an optical device that bends a light beam by an optical member and has a wall surface provided so as to surround the bent light beam. By forming the optical path so as to be folded, it is possible to suppress an increase in size, and to ensure the positioning accuracy of the optical member by the wall surface, and an optical device having excellent optical characteristics, and the optical device An image display device using can be provided.

Brief Description of Drawings

FIG. 1 is a schematic configuration diagram showing a retinal scanning type image display device as an image display device in the present embodiment.

FIG. 2 is a schematic view showing a scanning mode of beam light in the present embodiment.

FIG. 3 is a plan view showing an optical system and an optical path of laser light in the present embodiment and a configuration of a support member.

FIG. 4 is a perspective view showing an optical system and an optical path of laser light in the present embodiment and a configuration of a support member.

FIG. 5 is a perspective view showing an optical system and an optical path of a laser beam in the present embodiment and a configuration of a support member.

FIG. 6 is a diagram showing an optical system and an optical path of laser light in the present embodiment.

FIG. 7 is a side sectional view showing a configuration of positioning means.

FIG. 8 is a box-shaped perspective view.

FIG. 9 is a side cross-sectional view showing a configuration in which the peripheral edge of the opening formed in the wall is expanded toward the inside of the wall.

FIG. 10 is a plan view showing the configuration of the position adjusting means.

Explanation of symbols [0040] 1 image display device

19 First scan system

19a, 21a, 102, 104, 106, 108, M Optical member, Reflective member

21 Second scanning system

24 pupil

51 Support member

51a, 51b, 51c, 51d, 51e, 51f, 51g, 51h, 51x Wall

51a 'Incident wall

51c 'Adjacent wall

51d 'Incident wall

51e 'Adjacent wall

51x 'wall

51a, ..., 51c, ..., 51d, ..., 51e, ..., 51g, ..., 51h, ..., 51x opening

52 Holding member

53 Positioning means

60 Position adjustment means

100 optics

BEST MODE FOR CARRYING OUT THE INVENTION

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

[0042] [Configuration of image display apparatus]

Hereinafter, an embodiment of an image display device according to the present invention will be described with reference to the drawings. First, the configuration of a retinal scanning display 1 that is an example of an image display device according to the present invention will be described with reference to FIG.

As shown in FIG. 1, the retinal scanning display 1 is provided with a light source unit 2 for processing a video signal supplied from the outside. The light source unit 2 is provided with a video signal supply circuit 3 that receives a video signal from the outside and generates each signal as an element for synthesizing the video based on the video signal. Signal 4, vertical synchronization signal 5, and horizontal synchronization signal 6 are output. The light source unit 2 has The light source emits laser light whose intensity is modulated based on the red (R), green (G), and blue (B) video signals transmitted from the video signal supply circuit 3 as the video signal 4. R laser driver 10, G laser driver 9, and B laser driver 8 for driving the R laser 13, the G laser 12, and the B laser 11 are provided. Furthermore, a collimating optical system 14 provided so as to collimate the laser light emitted from each laser into parallel light, and a dichroic mirror 15 for multiplexing the collimated laser lights are combined. A coupling optical system 16 for guiding the laser light to the optical fiber 17 is provided. A semiconductor laser such as a laser diode or a solid-state laser may be used as the R laser 13, the G laser 12, and the B laser 11. Note that the light source unit 2 in the present embodiment corresponds to an example of at least one light source and a modulation unit that modulates the intensity of the light beam emitted from the light source power according to an image signal.

In addition, the retinal scanning display 1 is guided by a collimating optical system 18 that guides laser light as a light beam propagated from the light source unit 2 to an optical device 100 described later, and the collimating optical system 18. An optical device 100 that scans the laser light, and a second relay optical system that guides the laser light scanned by the optical device 100 to the pupil 24 of the observer.

The optical device 100 includes a vertical scanning system 19 as a first scanning system that scans the collimated laser light guided by the collimating optical system 18 in the vertical direction using a galvano mirror 19a, and a vertical scanning system. The first relay optical system 20 that guides the laser beam scanned by 19 to a horizontal scanning system 21 as a second scanning system, and a laser that is scanned by the vertical scanning system 19 and incident via the first relay optical system 20 It has a horizontal scanning system 21 that scans light in the horizontal direction using a galvano mirror 21a, and a support structure 50 shown in FIG. 3 that supports the galvano mirror 19a, the first relay optical system 20, and the galvano mirror 21a. And

[0046] The first relay optical system 20 is configured such that the galvano mirror 19a of the vertical scanning system 19 and the galvano mirror 21a of the horizontal scanning system 21 are conjugate, and the second relay optical system 22 is galvano mirror 21a. And the pupil 24 of the observer are provided so as to be conjugate with each other. The second relay optical system 22 makes the laser light scanned by the horizontal scanning system 21 of the optical device 100 enter the pupil 24 of the observer.

[0047] As a specific example, the vertical scanning system 19 is provided for each scanning line of an image to be displayed. This is an optical system that performs vertical scanning (an example of primary scanning) that vertically scans the laser beam in the vertical direction. The vertical scanning system 19 includes a galvano mirror 19a that scans the laser beam in the vertical direction, and a vertical scanning control circuit 19c that controls driving of the galvano mirror 19a.

On the other hand, the horizontal scanning system 21 performs horizontal scanning (an example of secondary scanning) in which a laser beam is scanned horizontally from the first scanning line to the last scanning line for each frame of an image to be displayed. ). Further, the horizontal scanning system 21 includes a galvano mirror 21a that performs horizontal scanning, and a horizontal scanning control circuit 21c that controls driving of the galvano mirror 21a. Therefore, the vertical scanning system 19 and the horizontal scanning system 21 perform scanning in a direction crossing each other.

The vertical scanning system 19 is designed to scan the laser beam at a higher speed, that is, at a higher frequency than the horizontal scanning system 21. Further, the vertical scanning system 19 scans the beam light at the vertical scanning angle, and the horizontal scanning system 21 scans the beam light at the horizontal scanning angle. In this embodiment, the vertical scanning angle is the horizontal scanning angle. Is set smaller than. This is because, as shown in FIG. 2 (a), the display range 152 of the image is shorter in the vertical direction Y than in the horizontal direction X, so the scanning trajectory s of the light beam is also higher in the vertical direction Y than in the horizontal direction X. This is because the vertical scanning angle in the vertical direction is smaller than the horizontal scanning angle in the horizontal direction. For this reason, as shown in FIG. 2 (b), the scanning angle must first be increased! After scanning in the horizontal direction, scanning is performed in the vertical direction where the scanning angle is small, and the beam light is Compared to the scanning configuration, as shown in Fig. 2 (a), after scanning in the vertical direction, which requires a small scanning angle, the scanning angle must be increased. , Space can be saved.

In the present embodiment, the vertical scanning system 19 having a small scanning angle is used as the scanning system (high-speed scanning system) that scans the beam light at high speed, and the scanning system (low-scanning system) that scans the beam light at low speed. The power of adopting the horizontal scanning system 21 with a large scanning angle as a high-speed scanning system) For example, a normal video signal such as NTSC (National Television Standards Committee) is not shown because the horizontal scanning corresponds to high-speed scanning. In the video signal supply circuit 3, the video signal is converted into digital data so that the horizontal scan is at low speed and the vertical scan is at high speed. Conversion. Of course, if it is assumed that the video signal input to the video signal supply circuit 3 has a signal format such that the vertical scanning system 19 performs high-speed scanning, the above-described conversion processing can be performed without any particular necessity.

In the present embodiment, the vertical scanning system 19 with a small scanning angle is used as the scanning system (high-speed scanning system) that scans the beam light at high speed, and the scanning system (low-scanning system) that scans the beam light at low speed. As the high-speed scanning system, the horizontal scanning system 21 having a large scanning angle is adopted. However, the present invention is not limited to this. For example, the scanning system for scanning light at high speed (high-speed scanning system) has a large scanning angle. As a scanning system (low-speed scanning system) that scans the light beam 21 at a low speed, the vertical scanning system 19 with a small scanning angle may be adopted.

That is, the vertical scanning angle (an example of the primary scanning angle) scanned in the vertical direction (an example of the primary direction) is the horizontal scanning angle (an example of the secondary direction) (2 Since the scanning width of the beam light scanned in the vertical direction can be made smaller than the scanning width of the beam light scanned in the horizontal direction, the scanning beam is scanned. Considering the optical path of light, collimating optical system 18 that guides the directional beam light to vertical scanning system 19, vertical scanning system 19, first relay optical system 20 that guides the beam light from vertical scanning system 19 to horizontal scanning system 21, etc. The space in which the space is provided can be reduced, and the apparatus can be further reduced in size.

In addition, as shown in FIG. 1, the vertical scanning system 19 and the horizontal scanning system 21 are connected to the video signal supply circuit 3 and output from the video signal supply circuit 3, respectively. The laser beam is scanned in synchronization with each of the signals 6.

Note that the vertical scanning system 19 and the horizontal scanning system 21 in this embodiment scan the frame by scanning the incident light beam in the primary direction and the secondary direction substantially perpendicular to the primary direction. It is an example of the optical scanning device to form.

Note that the vertical scanning system 19 in this embodiment corresponds to an example of a primary scanning unit that scans incident beam light in the vertical direction, and the horizontal scanning system 21 in this embodiment has a vertical direction. This corresponds to an example of secondary scanning means for scanning the light beam scanned in the horizontal direction. Further, the first relay optical system 20 in the present embodiment corresponds to an example of a relay optical system (relay optical means). Next, the process from when the retinal scanning display 1 according to the embodiment of the present invention receives an image signal from the outside until the image is projected onto the retina of the observer will be described with reference to FIG. To do.

As shown in FIG. 1, in the retinal scanning display 1 of the present embodiment, when the video signal supply circuit 3 provided in the light source unit 2 is supplied with a video signal from an external force, the video signal is displayed. The signal supply circuit 3 includes an R video signal, a G video signal, and a B video signal power 4 for outputting laser beams of red, green, and blue colors, a vertical synchronization signal 5, and a horizontal synchronization signal 6 Is output. R laser driver 10, G laser driver 9, and B laser driver 8 are respectively connected to R laser 13, G laser 12, and B laser 11 based on the input R video signal, G video signal, and B video signal. A drive signal is output. Based on this drive signal, the R laser 13, the G laser 12, and the B laser 11 generate laser beams whose intensity is modulated, and output the laser beams to the collimating optical system 14, respectively. The video signal supply circuit 3 controls the timing of generating laser light and outputting each to the collimating optical system 14 in accordance with a BD signal (not shown) indicating the driving state of the galvano mirror 19a described later. That is, such a retinal scanning display 1 (video signal supply circuit 3) controls the timing at which the galvanometer mirror 19a or the like emits a light beam. Laser light that also generates point light source power is collimated into parallel light by the collimating optical system 14 and then combined into a single light beam by being incident on the dichroic mirror 15, and then coupled optical system 16 To be incident on the optical fiber 17.

The laser light propagated by the optical fiber 17 is guided from the optical fiber 17 by the collimating optical system 18 and emitted to the vertical scanning system 19. The emitted laser light is incident on the deflection surface 19b of the galvanometer mirror 19a of the vertical scanning system 19. The laser light incident on the polarization surface 19b of the galvanometer mirror 19a is scanned in the vertical direction in synchronization with the vertical synchronization signal and enters the deflection surface 21b of the galvanometer mirror 21a of the horizontal scanning system 21 via the first relay optical system 20. To do. In the first relay optical system 20, the deflection surface 19b of the galvanometer mirror 19a and the deflection surface 21b of the galvanometer mirror 21a are adjusted to have a conjugate relationship, and the surface tilt of the galvanometer mirror 19a is corrected. The galvanometer mirror 21a is synchronized with the horizontal synchronization signal 6 in the same way as the galvanometer mirror 19a is synchronized with the vertical synchronization signal, and its deflection surface 21b The laser beam is scanned in the horizontal direction by the galvanometer mirror 21a. Laser light scanned two-dimensionally in the horizontal and vertical directions by the vertical scanning system 19 and the horizontal scanning system 21 so that the deflection surface 21b of the galvano mirror 21a and the pupil 24 of the observer have a conjugate relationship. The incident light is incident on the pupil 24 of the observer by the provided second relay optical system 22 and projected onto the retina. The observer can thus recognize the image by the laser light that is two-dimensionally scanned and projected onto the retina. Although the galvanometer mirror 19a of the vertical scanning system 19 and the galvanometer mirror 21a of the horizontal scanning system 21 have been described with the same names, their reflecting surfaces are swung (rotated) to scan light. Needless to say, any drive system such as a resonance type, non-resonance type, piezoelectric drive, electromagnetic drive, electrostatic drive, etc. can be used.

[0059] [Configurations of various optical systems]

As described above, the configurations of various optical systems that guide the beam light emitted from the optical fiber 17 to the pupil 24 of the observer while scanning two-dimensionally will be described with reference to FIGS.

As shown in FIGS. 3 to 5, various optical systems include a first reflection mirror 102, a galvano mirror 19a, a half mirror 104, a concave mirror 106, a second reflection mirror 108, and a galvano as optical members. It includes at least mirror 21a. The first reflecting mirror 102, the galvano mirror 19a, the half mirror 104, the concave mirror 106, the second reflecting mirror 108, and the galvano mirror 21a are erected with the reflecting surface in the horizontal direction and the vertical direction. ing

[0061] The first reflecting mirror 102 guides the beam light emitted from the optical fiber 17 to the deflecting surface 19b of the galvano mirror 19a by totally reflecting the light, and is reflected by the deflecting surface 19b of the galvano mirror 19a to be perpendicular. The beam light scanned in the direction has a function of guiding it to the half mirror 104 by total reflection. The first reflecting mirror 102 is included in the collimating optical system 18 and the first relay optical system 20 described above.

[0062] The galvanometer mirror 19a reflects the light beam reflected by the first reflecting mirror 102 by the polarization surface 19b by being driven to rotate in the direction indicated by reference numeral B1 with reference to the reference numeral A1 extending in the horizontal direction. By doing so, it scans in the vertical direction and guides it to the first reflecting mirror 102 [0063] The half mirror 104 guides the beam light reflected by the first reflecting mirror 102 to the concave mirror 106 by transmitting it, and reflects the beam light reflected by the concave mirror 106 to reflect the beam light. 2 Has a function of guiding to the reflection mirror 108. The half mirror 104 is included in the first relay optical system 20 described above.

The concave mirror 106 is a condensing mirror that condenses the diffused beam light. The concave mirror 106 totally reflects the beam light reflected by the first reflection mirror 102 and transmitted through the half mirror 104 to collect the light. And has a function of guiding to the half mirror 104. The concave mirror 106 is included in the first relay optical system 20 described above.

[0065] The second reflecting mirror 108 has a function of guiding the beam light collected by the concave mirror 106 and reflected by the half mirror 104 to the deflecting surface 21b of the galvano mirror 21a by totally reflecting the beam light. The second reflecting mirror 108 is included in the first relay optical system 20 described above.

[0066] The galvanometer mirror 21a is driven to rotate in the direction indicated by reference numeral B2 with reference to the reference numeral A2 extending in the vertical direction, so that the light beam reflected by the second reflecting mirror 108 is reflected by the polarization surface 21b. By doing so, it is scanned in the horizontal direction and led to the second relay optical system 22 (see FIG. 1).

In such various optical systems, the beam light emitted from the optical fiber 17 is collected and incident on the first reflection mirror 102. The beam light incident on the first reflecting mirror 102 is totally reflected and incident on the galvanometer mirror 19a of the vertical scanning system 19 while being condensed. The beam light incident on the galvanometer mirror 19a of the vertical scanning system 19 is incident on the first reflecting mirror 102 while being scanned in the vertical direction. This beam light is focused and then diffused until it enters the first reflecting mirror 102 from the galvano mirror 19a. Then, the beam light incident on the first reflecting mirror 102 is totally reflected, and is incident on the half mirror 104 by the undiffused force S. The light beam incident from the galvano mirror 19a and the light beam emitted from the optical fiber 17 are reflected by the first reflection mirror 102 at different locations. Then, the beam light incident on the half mirror 104 from the first reflecting mirror 102 is transmitted through the noise mirror 104 at a predetermined ratio, and is incident on the concave mirror 106 while being diffused. The light beam incident on the concave mirror 106 is incident. The force diffused before being reflected is reflected and incident on the half mirror 104 while being condensed. The beam light incident on the half mirror 104 from the concave mirror 106 is reflected by the noise mirror 104 at a predetermined ratio, and is incident on the second reflecting mirror 108 while being condensed. The beam light incident on the second reflecting mirror 108 is totally reflected and incident on the galvano mirror 21a of the horizontal scanning system 21 while being condensed. The beam light incident on the galvano mirror 2 la of the horizontal scanning system 21 is scanned in the horizontal direction and is incident on the second relay optical system 2 2 (see FIG. 1) if condensed. Thus, the diffused beam light power is condensed by the concave mirror 106 between the galvanometer mirror 19a of the vertical scanning system 19 and the galvanometer mirror 21a of the horizontal scanning system 21.

That is, the first relay optical system 20 is provided in the optical path between the vertical scanning system 19 and the horizontal scanning system 21, and the light beam scanned in the primary direction by the vertical scanning system 19 is the horizontal scanning system 21. At least a concave mirror 106 is introduced. Therefore, as will be described in detail later, without using a concave mirror, for example, a first convex lens that makes a diffusing beam a parallel beam or a second convex lens that collects the parallel beam is used. Compared to the conventional configuration, it is not necessary to use such a convex lens, so that the apparatus can be miniaturized. In addition, it is possible to design without considering chromatic aberration.

Further, a half mirror 104 is provided between a galvano mirror 19a in the vertical scanning system 19 and a concave mirror 106 described later. Therefore, by using a half mirror between the primary scanning means and the condensing mirror, the optical path can be folded, so that space can be saved efficiently and the device can be further downsized. It is.

[0070] In particular, the galvanometer mirror 19a of the vertical scanning system 19 vertically transmits the beam light between the first reflection mirror 102 and the reference signs Cl, C2, and C3 as shown in FIG. 6 (a). As shown in FIG. 6B, the surface indicated by reference numeral D including the beam light scanned by the vertical scanning system 19 becomes the vertical scanning surface. Specifically, as shown in FIG. 6 (c), the beam light scanned by the vertical scanning system 19 from the galvano mirror 19a of the vertical scanning system 19 to the first reflecting mirror 102 is directed to the vertical force. The vertical scanning plane D is included, and the approximate center line in the vertical scanning plane is the scanning center line F. Note that the vertical scanning plane in this embodiment is a scanning plane including a light beam from the vertical scanning to the horizontal scanning, and the galvano of the vertical scanning system 19. This is the scanning plane of the optical path from the mirror 19a to the galvanometer mirror 2 la of the horizontal scanning system 21.

Further, the incident direction of the beam light incident on the galvanometer mirror 19a of the vertical scanning system 19 is a direction indicated by a symbol E as shown in FIG. 6 (c). That is, the light beam is incident from the direction intersecting the vertical scanning plane D. Therefore, for example, an optical system that is incident on the primary scanning unit, a relay optical system between the primary scanning unit and the secondary scanning unit, a secondary scanning unit, and an optical that guides the light flux from the secondary scanning unit to the retina of the eye When installing various optical systems and scanning means such as optical systems, it is possible to provide a space to secure the optical path of the light beam that does not interfere with the primary scanning surface, and it is possible to further downsize the device. is there.

[0072] The first relay optical system 20 including the first reflecting mirror 102, the half mirror 104, the concave mirror 106, the second reflecting mirror 108, and the like is as shown in FIGS. 6 (b) and 6 (c). The scanning center line F is provided so as to intersect the vertical scanning plane D. Therefore, for example, when the scanning center line and the primary scanning plane intersect, the condensed light flux is diffused, and the diffused light flux is condensed by the condenser mirror and incident on the primary scanning means. When providing various optical systems and scanning means, such as an optical system to be used and a relay optical system between the primary scanning means and the secondary scanning means, a space for securing the optical path of the light beam is provided. The device can be downsized.

[0073] This is because the optical device 100 emits laser light by the first reflecting mirror 102, the galvano mirror 19a, the half mirror 104, the concave mirror 106, the second reflecting mirror 108, and the galvano mirror 21a as optical members. Made by folding. These optical members function as reflecting members that reflect laser light.

[0074] The support structure 50 has an annular shape as will be described later, a support member 51 that supports the first reflecting mirror 102, the galvano mirror 19a, the second reflecting mirror 108, and the galvano mirror 21a, and the half mirror 104 and the concave mirror. The holding member 52 as a bottom plate member schematically shown in FIG. 8 is opposed to the holding member 52, which supports the lower force 106 and also holds the lower force of the support member 51 to block the entire lower side of the support member 51. And a top plate member (not shown) that closes the entire upper side of the support member 51. The support member 51, the holding member 52, and the top plate member are made of resin-molded resin and have a box shape surrounding the bent beam light.

[0075] As shown in FIG. 3, the support member 51 has an annular shape and a plurality of support members 51 so as to form a predetermined angle with each other. Formed as outer surfaces of the provided wall parts 51a, 51b, 51c, 51d, 51e, 51f, 51g, 51h and wall parts 51a, 51b, 51c, 51d, 51e, 51f, 51g, 5 lh Wall surfaces 5 la ', 51b', 51c ', 51d', 51e ', 51f', 51g ', 51h.

[0076] The wall surfaces 51a, 51b, 51c, 51d, 51e, 51f, 51g, 51h are the first reflecting mirror 102, the galvanometer mirror 19a, the noof mirror 104, the concave mirror 106, the second It is provided in an annular shape so as to surround the laser beam bent by the reflection mirror 108 and the Galnon mirror 21a. Therefore, the first reflection mirror 102, the galvano mirror 19a, the half mirror 104, the concave mirror 106, the second reflection mirror 108, the galvano mirror 21a, the wall portions 51a, 51b, 51c, 51d, 51e, 51f, 51g, 51h, and the wall surface 5 la, 51b, 51c, 51d, 51e, 51f, 51g, 51h, a forceless endless ring.

[0077] The support member 51 includes a first reflecting mirror 102 on the wall surface 51c 'that is the outer surface of the wall portion 51c, a galvano mirror 19a on the wall surface 51e' that is the outer surface of the wall portion 51e, and the wall portion 51g. The second reflecting mirror 108 is supported on the wall surface 51g ′ which is the outer surface, and the gallon mirror 21a is supported on the wall surface 51 which is the outer surface of the wall portion 51h.

As shown in FIGS. 4 and 5, the wall 51c that supports the first reflecting mirror 102 has an opening 51c "that transmits the beam light bent by the first reflecting mirror 102, and is a galvanometer mirror. The wall 51e supporting the 19a has an opening 51e "that transmits the beam light bent by the galvano mirror 19a, and is bent by the second reflecting mirror 108 to the wall 51g supporting the second reflecting mirror 108. An opening 51g "that transmits the beam light is provided, and an opening 51h" that transmits the beam light that is bent by the galvano mirror 21a is provided on the wall 51h that supports the galvano mirror 21a.

[0079] The support member 51 has a wall surface 5la 'as an incident wall surface on which the light beam is incident on the optical device 100, in other words, the support member 51, so that the incident light is incident. The support member 51 has a wall surface 51d ′ as an exit wall surface from which the beam light is emitted from the optical device 100, in other words, the support member 51, and emits the beam light. 51d ".

The incident wall surface 51a ′ and the emission wall surface 51d ′ are disposed so as to face each other. Therefore, the support member 51 is miniaturized and contributes to the miniaturization of the optical device 100. [0081] The support member 51 includes a wall surface 51c 'supporting the first reflecting mirror 102 and a wall surface 51e' supporting the galvano mirror 19a as a plurality of adjacent wall surfaces adjacent to the output wall surface 51d '. Yes. For this reason, the light beam is emitted after being bent in the support member 51, which reduces the size of the support member 51 and contributes to the size reduction of the optical device 100. From the viewpoint of downsizing, it is desirable to support the optical member on the adjacent wall surface on both sides of the output wall surface as in the present embodiment, but it is sufficient that the optical member is supported on the adjacent wall surface in at least one side.

The support member 51 is erected with respect to the holding member 52 in a direction perpendicular to the running surface by the galvanometer mirror 21a of the horizontal scanning system 21. Therefore, wall 51a, 51b, 51c, 51d, 51e, 51f, 51g, 51h, wall 51a ', 51b', 51c ', 51d', 51e ', 51f, 51g', 51h ' Perpendicular to the surface.

[0083] In addition, each of the wall portions 51a, 51b, 51c, 51d, 51e, 51f, 51g, 51h is adjacent to a plurality of other wall portions, or another single wall portion, holding member 52. In addition, it is adjacent to and connected to the top plate member. This increases the molding accuracy of each wall 51a, 51b, 51c, 51d, 51e, 51f, 51g, 51h Positioning accuracy between each wall 51a, 51b, 51c, 51d, 51e, 51f, 51g, 51h As will be described later, this contributes to improving the positioning accuracy of the first reflecting mirror 102, the galvanometer mirror 19a, the nouveau mirror 104, the concave mirror 106, the second reflecting mirror 108, and the galvanometer mirror 21a that are attached on the basis of this.

[0084] The wall surfaces 51a ', 51b, ， 51c, 51d, 51e, 51f, 51g, 51h are all perpendicular to the virtual reference plane formed by the bent beam light. Such a reference plane is a plane including the beam light when the beam light is scanned at the center in the scanning range of the beam light scanned by the galvanometer mirror 19a of the vertical scanning system 19. Therefore, the vertical scanning system 19 is adjusted so that the scanned light beam is on the same plane when the light beam is scanned at the center in the scanning range of the light beam scanned by the galvanometer mirror 19a. .

[0085] Thereby, the first reflection mirror 102, the galvano mirror 19a, and the half mirror with reference to the arrangement direction of the wall surfaces 51a, 51b, 51c, 51d, 51e, 51f, 51g, 51h. 104, concave mirror 106, second reflecting mirror 108, galvano mirror 21a Is possible.

[0086] The first reflecting mirror 102, the galvano mirror 19a, the half mirror 104, the concave mirror 106, the second reflecting mirror 108, and the galvano mirror 21a are arranged so as to be symmetric in a direction orthogonal to the applied reference plane. ing. As a result, the first reflecting mirror 102, the galvanometer mirror 19a, the half mirror 104, the concave mirror 106, the second reflecting mirror 108, and the galvanometer mirror 21a are positioned with high accuracy.

[0087] The opening 51c "is smaller than the first reflecting mirror 102 supported by the wall 51c. The opening 51g" smaller than the galvanometer mirror 19a supported by the wall 51e is the wall 51g. The opening 51h "which is smaller than the second reflecting mirror 108 supported on the wall is smaller than the galvanometer mirror 21a supported on the wall 51h. Therefore, the wall 51c, the wall 51e, the wall 51g, and the wall 51h are respectively the walls 51c, 51e, 51g corresponding to the peripheries of the opening 51c ", the opening 51e", the opening 51g ", and the opening 51h", respectively. 51h, the edges of the first reflecting mirror 102, the galvano mirror 19a, the second reflecting mirror 108, and the galvano mirror 2la are supported.

Therefore, the first reflection mirror 102, the galvano mirror 19a, the second reflection mirror 108, and the galvano mirror 21a are positioned with high accuracy in a stable state. From the standpoint of positioning accuracy, it is sufficient that the wall portion having the opening supports the optical elements supported by the wall at a plurality of points, in other words, at a plurality of points. In particular, the surface corresponding to the periphery of the opening as in this embodiment. It is preferable to support with. The first reflecting mirror 102, the galvano mirror 19a, the second reflecting mirror 108, and the galvano mirror 21a are fixed to the wall surfaces 51c ′, 51e, 51g ′, 51h ′ with an adhesive.

As shown in FIG. 7, from the viewpoint of positioning accuracy, it is desirable that the wall portion 51x is provided with a rib 53 as positioning means for positioning the optical member する relative to the wall surface 51χ ′. The rib 53 protrudes from the wall 51χ ′ by integral molding at a position near the periphery of the opening 51χ ″ formed in the wall 51χ. The rib 53 corresponds to the entire periphery of the optical member Μ. However, the positioning means may be provided at the center of each side edge, or may be provided at the center of the opposite side edge. It may be a recess corresponding to the shape.

[0090] In the figure, the optical member に corresponds to the first reflecting mirror 102, the galvano mirror 19a, the second reflecting mirror 108, and the Ganoleno mirror 21a, and the wall 咅 51χί, the wall 咅 51c, 51e, 51g , Five The wall 51x corresponds to the wall 51c, 51e, 51g, 51h, and the opening 51x "is the opening 51c, the saddle opening 51e", the opening 51g ", the opening 51h. It corresponds to ". The same applies to Fig. 8 and below.

[0091] In the configuration in which the rib 53 is provided, when the optical member M is fitted and fixed to the wall surface 51χ 'by the rib 53, for example, it is not necessary to perform fixing with an adhesive. However, it may be fixed with an adhesive.

[0092] The wall portions 51a, 51b, 51c, 51d, 51e, 51f, 51g, 51h have the same thickness, and the first reflecting mirror 102, the galvano mirror 19a, and the second reflecting mirror, which are optical members. 108, the wall portions 5lc, 51e, 51g, 51h supporting the galvanomirror 2la are also the same in thickness, but the thicknesses may be different. The wall portions 51c, 51e, 51g, and 51h supporting the first reflecting mirror 102, the galvano mirror 19a, the second reflecting mirror 108, and the galvano mirror 21a, which are optical members, so that the optical path length of the beam light becomes a desired optical path length. If the thickness is set, a desired optical path can be easily obtained without using a jig or the like.

[0093] The heights of the wall portions 51a, 51b ゝ 51c ゝ 51d, 51e, 51f, 51g, 51h are the same as each other, and the first reflecting mirror 102, the galvanometer mirror 19a, and the second reflecting, which are optical members The heights of the walls 51c, 51e, 51g and 51h supporting the mirror 108 and the galvano mirror 21a are also the same as each other. The applied heights are the first reflecting mirror 102, the galvano mirror 19a and the second reflecting mirror 108 which are supported. The galvano mirror 21a may be different in size and shape. The thickness may be varied to correspond to the size and shape of the galvanometer mirror 21a together with the height or instead of the height.

[0094] Inside each wall surface 51a, 51b, 51c, 51d, 51e, 51f, 51g, 51h, that is, in the present embodiment, each wall surface 51a, 51b, 51c, 51d 51e, 51f, 51g, 51h The inner surface of J is painted black. This is to prevent ghosts and the like from being generated due to irregular reflection of the light beam. Instead of applying black, the resin itself constituting the support member 51 may be black.

Here, as already described, the support member 51, the holding member 52, and the bottom plate member are integrally formed to form a box shape surrounding the bent beam light. As shown in FIG. 8, the box shape is composed of a plurality of wall portions 51χ and a holding member 52 forming at least four wall portions. Each of the plurality of wall portions 51x is adjacent to and connected to the other plurality of wall portions 51x, or adjacent to the other single wall portion 51x and the holding member 52. It is a shape that is installed and connected. Therefore, the minimum unit of the box shape is the shape shown in FIG. 8, and the number of wall portions 51x and the shape of the support member 51 are determined according to the number of optical members and the like.

[0096] In the box shape, any wall 5 lx is integral with a plurality of walls 5 lx, etc., so any wall 5 lx has high accuracy in its formation and improved positioning accuracy of the optical member attached thereto Contribute to. Note that the minimum unit of the box shape that can be applied may include the bottom plate member together with the holding member 52 instead of the holding member 52.

[0097] Some of the plurality of wall portions 51x may be detachable from the other wall portions 51x. In this case, the support member 51 is assembled by integrating the unit including the part of the wall portion 5 lx that is powerful and the unit including the other wall portion 5 lx of the force. If the optical member is integrally attached to the wall portion 5 lx constituting each unit, the optical member can be easily attached to the wall portion 51x.

[0098] In particular, if each unit to be applied is a box-shaped part and the box-shaped part is assembled to form the support member 51, each wall 51x in each unit has high accuracy in its formation. This contributes to improving the positioning accuracy of the optical member attached to the lens. Here, the box-shaped portion includes a plurality of wall portions 51x or a structure including a single wall portion 51x and the holding member 52 or the top plate member.

[0099] As shown in FIG. 9, the opening 51x "may have a taper shape whose peripheral edge is expanded toward the inside of the wall 51x. According to this configuration, the opening 51x" The space is reduced, the strength of the support member 51 is improved, and the contact area of the wall surface 51χ ′ with the optical member Μ can be increased, which contributes to improving positioning accuracy. In this case as well, a positioning member such as the rib 53 described above may be provided.

As shown in FIG. 10, it may have a position adjusting means 60 for positioning the optical member に対する with respect to the wall surface 51χ ′. The position adjusting means 60 includes a holder 61 that integrally supports the optical member と, an attachment member 62 that is integrated with the holder 61 and is integrated with the wall portion 5 lx via the holder 61, A pin 63 is provided for rotating the member 62 to the wall 51x so as to be rotatable, and a screw 63 for fixing the attachment member 62 to the wall 51x. [0101] Therefore, the mounting member 62 is rotated around the pin 63 so that the optical member M occupies a desired position with respect to the wall surface 51χ ', and then the mounting member 62 is moved to the wall portion by the screw 63. By fixing to 51χ, the optical member Μ can be accurately positioned at a desired position with respect to the wall surface 51χ '.

[0102] In the above-described form, the supporting member 51 has the wall portions 51a, 51b, 51c, 51d, 51e, 51f, 5 lg, 5 lh or the wall portion 5 lx. The supporting member 51 is solid. There may be. In this case, the outer wall surface of the solid support member 51 forms the wall surface 51a ′, 51b ′, 51c ′, 51d ′, 51e ′, 5lf ′, 51g ′, 51h ′ or the wall surface 51χ ′. Also in this case, the positioning member such as the rib 53 described above and the position adjusting means 60 can be provided. The support member 51 is made of a transparent resin.

[0103] In this case, in order to make the inner side of the wall surface 51a ', 51b, ゝ 51c, 51d, 51e, 51f, 51g, 51h, or the wall surface 51χ' black, the wall surface 51a ', 51b ', 51c', 51d, 51e, 51f ', 51g', 51h 'or the force to apply the wall surface 51x' to the black wall If enclosed by a black member [substantially this wall surface 51a ', 51b ', 51c', 51d \ 51e \ 51f \ 51g ', 51h, or the inside of the wall 51χ' is black. However, the portion other than the portion corresponding to the opening 51a, the heel opening 51c, the heel opening 51d, the opening 51e ", the opening 51g", the opening 51h "or the opening 51x" is black.

[0104] The integrally formed support member 51, holding member 52, and top plate member are members that should also be referred to as a casing of the optical device 100, and include a first reflecting mirror 102, a galvano mirror 19a, a half mirror 104, and a concave surface. It is provided as a hollow member so as to surround the entire circumference of the beam light bent by the mirror 106, the second reflecting mirror 108 and the galvanometer mirror 21a.

[0105] As a result, stray light does not leak to the outside, so that unexpected light is incident on the eyes of the observer who is the user of the retinal scanning display 1, and the image quality recognized by the observer is deteriorated. It is prevented from being lowered. In order to ensure this with high accuracy, the entire opening 51c ", opening 51e", opening 51g "and opening 51h" are closed by the first reflecting mirror 102, the galvano mirror 19a, the second reflecting mirror 108 and the galvano mirror 21a, respectively. ing.

[0106] Note that this also contributes to improving the dust resistance in the optical device 100 and the support structure 50. For further improvement of the dust resistance, the openings 51a "and 51d" The whole It is desirable to close with a mirror, glass or the like. Closing the aperture 51a "with a half mirror that only allows the light beam to enter the optical device 100 and the support structure 50 contributes not only to dustproofness but also to the above-described deterioration or deterioration of image quality. When the aperture 51d "is closed with a noise mirror, only the beam light is allowed to be emitted out of the support structure 50.

[0107] While the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and within the scope of the gist of the present invention described in the claims. Various modifications and changes are possible.

[0108] For example, in the above-described embodiment, the force having both the entrance wall portion and the exit wall portion. As described above, when the support member is a minimum unit of a box shape, etc. It may be a configuration with only the

In the above-described embodiment, the vertical scanning system 19 and the horizontal scanning system 21 are the concave mirror 1

It was installed at a position where the optical path distance was equivalent to the radius of curvature of the concave mirror 106 from 06

Not limited to this.

[0110] In the above-described embodiment, the condensing mirror such as the concave mirror is provided between the vertical scanning system 19 and the horizontal scanning system 21, and between the horizontal scanning system 21 and the pupil 24. For example, a condensing mirror may not be provided between the horizontal scanning system 21 and the pupil 24, but at least a condensing mirror may be provided between the vertical scanning system 19 and the horizontal scanning system 21. Goodbye!

[0111] In the embodiment described above, the first relay optical system 20 as described above is adopted as an example of the relay optical system. However, the present invention is not limited to this, for example, a configuration not including the second reflection mirror 108, etc. Configurations other than those described above may be used. Further, for example, the force provided by the half mirror 104 between the vertical scanning system 19 and the concave mirror 106 is not limited to this. For example, the half mirror 104 is provided between the vertical scanning system 19 and the concave mirror 106. It does not have to be. Further, for example, the half mirror 104 may be provided at another position such as between the concave mirror 106 and the horizontal scanning system 21.

[0112] In the embodiment described above, the first reflecting mirror 102, the half mirror 104, the concave surface on the same plane intersecting the vertical scanning plane including the beam light scanned in the vertical direction by the vertical scanning system 19. There are relay optical systems such as mirror 106 and second reflection mirror 108. Not limited to this, for example, a part or all of the relay optical systems such as these are provided on the same plane that intersects the vertical scanning plane including the beam light that is scanned in the vertical direction by the vertical scanning system. It does not have to be done. Further, in the present embodiment, the force by which the light beam is incident from the direction intersecting the primary scanning plane is not limited to this. For example, the light beam is not incident from the direction intersecting the primary scanning plane. May be.

In the embodiment described above, the vertical scanning angle scanned in the vertical direction by the vertical scanning system 19 is set to be smaller than the horizontal scanning angle scanned in the horizontal direction by the horizontal scanning system 21. For example, the vertical scanning angle may be set larger than or the same as the horizontal scanning angle.

[0114] In the above-described embodiment, the light beam is first scanned in the vertical direction by the vertical scanning system 19, and then the beam light is scanned first in the horizontal direction by the horizontal scanning system 21. However, the present invention is not limited to this. For example, a configuration in which the beam light is first scanned in the horizontal direction by the horizontal scanning system and then the beam light is first scanned in the vertical direction by the vertical scanning system may be used. .

[0115] In the above-described embodiment, the incident beam light is configured to be moved in the vertical direction and the horizontal direction. However, the present invention is not limited to this. For example, the incident beam light is shifted in the primary direction. The scanning may be performed and the scanning may be performed in a secondary direction intersecting with the primary direction. Moreover, in this embodiment, although the concave mirror was employ | adopted as an example of a condensing mirror, it is not restricted to this.

[0116] In the above-described embodiment, the optical device as described above is provided, and the light beam modulated in accordance with the image signal is scanned in the primary direction and the secondary direction by the optical device, whereby the eye retina The retinal scanning display 1 (an example of a retinal scanning type image display device) that projects an image on the screen and displays the image has been described. However, the present invention is not limited to this. For example, the image is projected directly onto the retina of the eye. Even without this, the optical device as described above is provided, and the image is projected on a screen or the like by scanning the light beam modulated according to the image signal in the primary direction and the secondary direction by the optical scanning device. The present invention may be applied to a screen scanning type image display device for display (an example of an image display device is a laser display). An optical device to which the present invention is applied includes an optical scanning device that scans a laser beam in a laser printer. It can also be applied to other optical devices.

[0117] From the viewpoint of reducing the volume of the opening and improving the strength, the shape of the opening may be a cylindrical shape unlike the rectangular shape of the above-described embodiment.

[0118] The effects described in the embodiments of the present invention only list the most preferable effects generated by the present invention, and the effects of the present invention are described in the embodiments of the present invention. It is not limited to things.

Industrial applicability

[0119] An optical device capable of suppressing an increase in size by bending a light beam with an optical member, and a retinal scanning image display device and a screen scanning image display device using the optical device.

Claims

The scope of the claims

[I] An optical device for bending a light beam by an optical member,

An optical apparatus comprising a wall surface provided so as to surround the bent light beam.

[2] The wall surface has an exit wall surface from which the light beam exits and a plurality of adjacent wall surfaces adjacent to the exit wall surface, and the adjacent wall surface supports the optical member. The optical device according to claim 1.

[3] The optical device according to [1], wherein the wall surface includes at least one of an incident wall surface on which the light beam is incident and an output wall surface on which the light beam is emitted.

4. The wall surface according to claim 1, wherein the wall surface has an incident wall surface on which the light beam is incident and an output wall surface on which the light beam is emitted, and the incident wall surface and the output wall surface face each other. Optical device.

5. The optical device according to claim 1, further comprising position adjusting means for positioning the optical member with respect to the wall surface.

6. The optical device according to claim 1, wherein the wall surface is perpendicular to a reference surface formed by the bent light beam.

7. The optical device according to claim 6, wherein the optical members are arranged symmetrically in a direction orthogonal to the reference plane.

8. The optical device according to claim 1, wherein the member having the wall surface is made of resin.

9. The optical device according to claim 1, wherein the inside of the wall surface is black.

[10] A first scanning system that includes the optical member and scans the light beam, and a second scanning system that scans in a direction crossing the first scanning system, and scanning by these scanning systems. 2. The optical device according to claim 1, wherein any one of the surfaces is perpendicular to the wall surface.

[I I] The optical device according to claim 1, further comprising a support member that forms the wall surface and supports the optical member.

12. The optical device according to claim 11, wherein the support member is solid.

13. The optical device according to claim 12, wherein the optical member is supported on the wall surface. Place.

14. The optical apparatus according to claim 13, further comprising positioning means for engaging and positioning the optical member on the wall surface supporting the optical member.

15. The optical device according to claim 11, further comprising a holding member that holds the support member, wherein the support member has a wall portion having the wall surface as an outer surface.

16. The optical device according to claim 15, comprising a plurality of the wall portions, all of which are adjacent to the plurality of other wall portions or the holding member.

17. The optical device according to claim 16, wherein the wall portion and the holding member form a box shape surrounding the bent light beam.

18. The optical device according to claim 15, wherein the optical member is supported on the wall portion.

19. The optical apparatus according to claim 18, further comprising positioning means for engaging and positioning the optical member on the wall portion supporting the optical member.

20. The optical device according to claim 18, wherein the wall portion supporting the optical member has a thickness and a Z or height set in accordance with the supported optical element.

21. The optical device according to claim 18, wherein a thickness of the wall portion supporting the optical member is set so that an optical path length of the light flux becomes a desired optical path length.

[22] The wall portion supporting the optical member supports the optical member on the outer wall surface, and has an opening that transmits the light beam bent by the optical member. The optical device according to claim 18.

23. The optical device according to claim 22, wherein the optical member supported by the wall surface outside the wall portion is a reflecting member that reflects the light flux.

24. The optical device according to claim 22, wherein a peripheral edge of the opening has a tapered shape that expands toward the inside of the wall portion having the opening.

25. The optical device according to claim 22, wherein the wall portion having the opening supports the supported optical member at a plurality of locations.

26. The optical device according to claim 22, wherein the opening is smaller than the optical member supported by the wall portion having the opening.

27. The optical device according to claim 16, wherein the wall portion is detachable from other wall portions.

[28] A first box-shaped part including a first box-shaped part including the wall part detachably attached to the other wall part, and a second box-shaped part including the other wall part. 28. The optical device according to claim 27, wherein the portion is detachable from the second box-shaped portion.

29. The optical device according to claim 16, further comprising at least the wall portion and the holding member so as to surround the entire periphery of the bent light beam.

[30] A retinal scanning type image display device for projecting and displaying an image formed by the light flux on the retina of an eye, comprising the optical device according to claim 1. apparatus.

[31] An image display device comprising the optical device according to claim 1, which is a screen scanning type image display device that projects and displays an image formed by the light beam on a screen.