WO2016147772A1

WO2016147772A1 - Optical fiber device and optical body

Info

Publication number: WO2016147772A1
Application number: PCT/JP2016/054254
Authority: WO
Inventors: 伸彦杉原
Original assignee: ウシオ電機株式会社
Priority date: 2015-03-16
Filing date: 2016-02-15
Publication date: 2016-09-22
Also published as: JP2016173387A

Abstract

This optical fiber device is provided with an optical body that is arranged between a first optical fiber body and a second optical fiber body. The optical body is provided with: an optical path part through which light transmits or passes so that light discharged from a first optical fiber is incident on a second optical fiber; and a cylindrical reflective part which is arranged on the outer circumference of the optical path part and reflects light. The outer width dimension of the second optical fiber body-side end portion of the optical path part is smaller than the outer width dimension of the core of the second optical fiber in the first surface.

Description

Optical fiber device and optical body

The present invention relates to an optical fiber device including an optical fiber, and also relates to an optical body including an optical path portion through which light passes or passes.

Conventionally, as an optical fiber device, a first optical fiber body having a plurality of first optical fibers, a second optical fiber body having one second optical fiber, a first optical fiber body, and a second optical fiber body are provided. 2. Description of the Related Art An optical fiber device including a cylindrical connecting body to be connected is known (for example, Patent Document 1). In the optical fiber device, light emitted from the emission surface of the first optical fiber is incident on the incident surface of the second optical fiber.

Incidentally, the second optical fiber includes a core as a core and a clad disposed on the outer periphery of the core and having a refractive index lower than that of the core. The light incident on the core is propagated along the longitudinal direction by being repeatedly reflected by the clad. However, when light is incident on the clad on the incident surface of the second optical fiber, for example, the second optical fiber may be damaged.

Japanese Unexamined Patent Publication No. 2004-87925

Therefore, in view of such circumstances, an object of the present invention is to provide an optical fiber device and an optical body capable of suppressing light from entering a clad of an optical fiber.

An optical fiber device includes a first optical fiber body having at least one first optical fiber, and a second optical fiber body having a second optical fiber into which light emitted from the first optical fiber is incident on a first surface. A cylindrical connection body that connects the first optical fiber body and the second optical fiber body, and is disposed inside the connection body, wherein the first optical fiber body and the second optical fiber body An optical body disposed between, and the optical body transmits or passes light so that light emitted from the first optical fiber enters the second optical fiber; and A cylindrical reflecting portion that is disposed on an outer periphery of the optical path portion and reflects light, and an outer width dimension at an end of the optical path portion on the second optical fiber body side is the first of the second optical fiber. It is smaller than the outer width dimension of the core on the surface.

Further, the optical fiber device includes a detection unit that detects light, and the first optical fiber body has light reflected from at least one of the optical path unit and the first surface of the second optical fiber on the first surface. An incident detection optical fiber; and a binding portion that binds the first surface side of the detection optical fiber and the second surface side of the first optical fiber; and the binding portion is attached to the connection body. The detection unit may be configured to detect light emitted from the second surface of the detection optical fiber.

In the optical fiber device, the optical path portion is made of a translucent material having a refractive index different from that of air and having translucency, and further abuts or separates from the first surface of the second optical fiber. It is possible to adopt a configuration in which they are arranged in such a manner.

In the optical fiber device, the optical path portion may be arranged so as to be in contact with or separated from the second surface of the first optical fiber.

In the optical fiber device, a plurality of the first optical fibers are provided such that light emitted from a plurality of light sources is incident from each first surface, and the first optical fiber body includes a plurality of the first optical fibers. The bundling part which binds the 2nd surface sides of a 1st optical fiber may be provided, and the structure that the said bundling part is connected to the said connection body may be sufficient.

The optical fiber device may be an image projection device that uses light emitted from the second surface of the second optical fiber as projection light.

The optical body includes a first optical fiber body having at least one first optical fiber, and a second optical fiber having a second optical fiber into which light emitted from the first optical fiber is incident on a first surface. And an optical path portion through which light passes or passes so that light emitted from the first optical fiber enters the second optical fiber, and the optical path portion A cylindrical reflecting portion that reflects light, and an outer width dimension at an end portion of the optical path portion on the second optical fiber body side is the first surface of the second optical fiber. It is smaller than the outer width dimension of the core.

As described above, the optical fiber device and the optical body according to the present invention have an excellent effect that light can be prevented from entering the clad of the optical fiber.

1 is an overall schematic diagram of an optical fiber device according to an embodiment. It is a principal part schematic of the optical fiber device which concerns on the same embodiment. It is principal part sectional drawing of the optical fiber apparatus which concerns on the same embodiment. It is principal part sectional drawing of the optical fiber apparatus which concerns on the embodiment, Comprising: It is a figure explaining the phenomenon of light. It is principal part sectional drawing of the optical fiber apparatus which concerns on other embodiment. It is principal part sectional drawing of the optical fiber apparatus which concerns on other embodiment. It is principal part sectional drawing of the optical fiber apparatus which concerns on other embodiment.

Hereinafter, an embodiment of an optical fiber device and an optical body will be described with reference to FIGS. In each figure (the same applies to FIGS. 5 to 7), the dimensional ratio in the drawing does not necessarily match the actual dimensional ratio.

As shown in FIG. 1, the optical fiber device 1 according to the present embodiment is an image projection device. The optical fiber device 1 forms a light image with a plurality of (three in the present embodiment) light source devices 2 (2R, 2G, 2B) that emit light of different colors and the light from the light source device 2. And an image projection unit 10 for projecting onto the screen 100.

The optical fiber device 1 includes a light guide 3 that makes light emitted from the light source device 2 incident on the image projection unit 10. The optical fiber device 1 also includes a power source 11 that supplies electricity to the

units

2 and 10 and a control unit 12 that controls the

units

2 and 10.

The light source device 2 includes a first light source device 2R that emits light of a first color (for example, red), a second light source device 2G that emits light of a second color (for example, green), And a third light source device 2B that emits light of three colors (for example, blue). In the present embodiment, the plurality of light source devices 2 emit light of the first to third colors (color wavelength regions) toward the image projection unit 10 in a separated state.

In the present embodiment, the first light source device 2R emits light having a wavelength of 590 to 693 nm (particularly, 615 nm to 665 nm), which is a red wavelength region, so as to emit red light. The second light source device 2G emits light having a wavelength of 498 to 580 nm (particularly, 520 nm to 555 nm) which is a green wavelength region in order to emit green light. The third light source device 2B emits light having a wavelength of 410 to 496 nm (particularly, 445 nm to 475 nm) which is a blue wavelength region in order to emit blue light.

The image projection unit 10 includes a uniformizing optical system (for example, a rod integrator) 10a that diffuses the light emitted from the light source device 2 so as to be uniform. The image projection unit 10 receives the light emitted from the homogenizing optical system 10a and forms an optical image, and the light emitted from the image forming optical system 10b receives the light. Is projected onto the screen 100, thereby providing a projection optical system (for example, a projection lens) 10c that forms an optical image of the image forming optical system 10b on the screen 100.

Although not shown, the image forming optical system 10b forms a light image with the light emitted from the light source device 2, and a light combining element that combines the light emitted from the spatial modulation element. (For example, a dichroic prism). For example, the spatial modulation element is a transmissive liquid crystal element, a reflective liquid crystal element, or a digital micromirror device.

Further, the image projection unit 10 includes an image projection main body 10d that accommodates the optical systems 10a to 10c. The light guide 3 is detachably connected to the light source device 2 and the image projection unit 10, and the light source device 2 includes a first connection portion 2 a connected to one end of the light guide 3. The image projection unit 10 includes a second connection unit 10 e that is connected to the other end of the light guide 3.

As shown in FIGS. 2 and 3, the light source device 2 includes a plurality of (four in FIG. 2) light sources 4 that emit laser light, and a plurality (four in FIG. 2) that receive light emitted from the light sources 4. A first optical fiber body 5 having a first optical fiber 51 and a detector 6 for detecting light. In the present embodiment, the light guide 3 is composed of a second optical fiber body 3 having a second optical fiber 31.

The light source device 2 includes a cylindrical connection body 7 that connects the first optical fiber body 5 and the second optical fiber body 3 to the first connection portion 2a. The light source device 2 includes an optical body 8 that is disposed inside the connection body 7 and disposed between the first optical fiber body 5 and the second optical fiber body 3. The light source device 2 includes a light source device main body 2 b that houses the light source 4, the first optical fiber body 5, and the detection unit 6.

Although not shown, each light source 4 includes at least one light emitting element that emits light (for example, a semiconductor laser that emits laser light). In addition, each light source 4 may include a lens (for example, a collimator lens or a converging lens) for efficiently allowing the light emitted from the light emitting element to enter the first optical fiber 51 as necessary.

In the first optical fiber 51 of the first optical fiber body 5, the light emitted from each light source 4 is incident from the first surface 51 a and is emitted from the second surface 51 b toward the optical body 8. The first optical fiber body 5 includes a detection optical fiber 52 in which light is incident on the first surface 52a and emits the light from the second surface 52b toward the detection unit 6, and a plurality of first optical fibers. 51, a bundling portion 53 that binds the second surface 51b side of 51 and the first surface 52a side of the detection optical fiber 52 is provided.

The second surfaces 51b of the plurality of first optical fibers 51 and the first surfaces 52a of the detection optical fibers 52 are arranged to be flush with each other. That is, the second surfaces 51b of the plurality of first optical fibers 51 and the first surfaces 52a of the detection optical fibers 52 are arranged on the same plane.

The binding portion 53 is detachably connected to one side of the connection body 7. For example, the binding portion 53 is detachably fixed to one side of the connection body 7 by a fixing mechanism (not shown) such as a cap nut or a bolt. Note that the binding portion 53 may be fixed to the connection body 7 so as not to be detachable by an adhesive or the like.

The detection unit 6 includes an optical sensor that measures the amount of light received. The detection unit 6 receives light emitted from the second surface 52 b of the detection optical fiber 52. Note that the detection unit 6 may include an optical system (such as a lens) for efficiently making the light emitted from the second surface 52b of the detection optical fiber 52 incident on the optical sensor, if necessary.

In the second optical fiber 31 of the second optical fiber body 3, the light emitted from the optical body 8 is incident from the first surface 31 a and the light is directed from the second surface (not shown) toward the image projection unit 10. Exit. That is, the light emitted from the first optical fiber 51 enters the first surface 31 a of the second optical fiber 31 via the optical body 8. The second optical fiber body 3 includes a cylindrical ferrule 32 that holds the end of the second optical fiber 31 inside.

The ferrule 32 is detachably connected to the other side of the connection body 7. For example, the ferrule 32 is detachably fixed to the other side of the connection body 7 by a fixing mechanism (not shown) such as a cap nut or a bolt. In addition, the ferrule 32 may be fixed to the connection body 7 so as not to be detachable by an adhesive or the like.

Further, the

optical fibers

31, 51, 52 are arranged at the center part and disposed outside the

cores

31c, 51c, 52c for propagating light, and the

cores

31c, 51c, 52c, and are located more than the

cores

31c, 51c, 52c.

Clads

31d, 51d, and 52d having a low refractive index are provided. For example, the

cores

31c, 51c, 52c and the

clads

31d, 51d, 52d are made of quartz glass or resin.

The optical body 8 includes an optical path portion 81 through which light passes so that light emitted from the second surface 51 b of the first optical fiber 51 enters the first surface 31 a of the second optical fiber 31, and the optical path portion 81. A cylindrical reflecting portion 82 that is disposed on the outer periphery and reflects light is provided. The optical body 8 is detachably fixed to the center of the connection body 7 by a fixing mechanism (not shown) such as a bolt, for example. The optical body 8 may be fixed to the connection body 7 so as not to be detachable with an adhesive or the like.

The optical path portion 81 is made of a translucent material having a refractive index different from that of air and having translucency. In the present embodiment, the optical path portion 81 is made of optical glass (refractive index: N = 1.5). And the optical path part 81 is formed in the column shape, and is formed so that it may become the same diameter along an axial direction.

The optical path portion 81 is disposed so as to be separated from the second surface 51 b of the first optical fiber 51 and is disposed so as to be separated from the first surface 52 a of the detection optical fiber 52. Specifically, the first surface 81 a of the optical path portion 81 faces the second surface 51 b of the first optical fiber 51 and the first surface 52 a of the detection optical fiber 52. Further, the optical path portion 81 is disposed so as to be separated from the first surface 31 a of the second optical fiber 31. Specifically, the second surface 81 b of the optical path portion 81 faces the first surface 31 a of the second optical fiber 31.

The reflection part 82 is formed in a cylindrical shape and is connected to the outer periphery of the optical path part 81. The reflecting portion 82 is disposed over the entire outer periphery of the optical path portion 81. In the present embodiment, the reflecting portion 82 is formed on the outer periphery of the optical path portion 81 by vapor-depositing a dielectric multilayer film, metal (for example, aluminum) or the like.

The outer width dimension W1 at the end (one end) of the optical path portion 81 on the first optical fiber body 5 side is larger than the outer width dimension W2 of the region where the cores 51c in the second surfaces 51b of the plurality of first optical fibers 51 are combined. Also big. Further, the outer width dimension W3 at the end (the other end) of the optical path portion 81 on the second optical fiber body 3 side is smaller than the outer width dimension W4 of the core 31c on the first surface 31a of the second optical fiber 31. .

The configuration of the optical fiber device 1 according to the present embodiment is as described above. Next, the operation of the optical fiber device 1 according to the present embodiment will be described with reference to FIGS. 3 and 4.

The light L 1 emitted from the second surface 51 b of the first optical fiber 51 is incident on the first surface 81 a of the optical path portion 81. At this time, since the outer width dimension W1 of one end of the optical path portion 81 is larger than the outer width dimension W2 of the region where the cores 51c of the plurality of first optical fibers 51 are combined, the second surface of the first optical fiber 51 Although the light L1 emitted from 51b gradually spreads, all (or most) is incident on the first surface 81a of the optical path portion 81. Note that light incident on the reflecting portion 82 from the optical path portion 81 is reflected on the inner peripheral surface of the reflecting portion 82.

And the said light L2 is radiate | emitted from the 2nd surface 81b of the optical path part 81, and injects into the 1st surface 31a of the 2nd optical fiber 31. FIG. At this time, since the outer width dimension W3 of the other end portion of the optical path portion 81 is smaller than the outer width dimension W4 of the core 31c of the second optical fiber 31, the light L2 emitted from the second surface 81b of the optical path portion 81. Are gradually spread, but are all (or most) incident on the core 31c of the second optical fiber 31 and are not (or hardly) incident on the clad 31d. Thereafter, the light is emitted from the second optical fiber 31 and used as projection light via the image projection unit 10.

Incidentally, the refractive index of the optical path portion 81 of the optical body 8 and the core 31c of the second optical fiber 31 is different from the refractive index of air. Accordingly, when light enters the first surface 81a of the optical path portion 81, when light exits from the second surface 81b of the optical path portion 81, when light enters the core 31c of the second optical fiber 31, Part of the light L3, L4, L5 (for example, 1%) is reflected.

At least a part of the reflected lights L3, L4, and L5 is incident on the first surface 52a of the detection optical fiber 52, and then is emitted from the second surface 52b of the detection optical fiber 52 to be detected by the detection unit 6. Is detected. The light detected by the detection unit 6 is used as detection light for detecting the output states of the plurality of light sources 4. And the control part 12 controls the electric power (electric current, voltage), etc. which are supplied to the light source 4 by controlling the power supply 11 based on the light quantity detected by the detection part 6, for example. Thereby, the output of the light source 4 can be controlled.

As described above, in the optical fiber device 1 according to this embodiment, the first optical fiber body 51 having at least one first optical fiber 51 and the light emitted from the first optical fiber 51 enter the first surface 31a. A second optical fiber body 3 having a second optical fiber 31, a cylindrical connection body 7 connecting the first optical fiber body 5 and the second optical fiber body 3, and the interior of the connection body 7 The optical body 8 is disposed between the first optical fiber body 5 and the second optical fiber body 3, and the optical body 8 is emitted from the first optical fiber 51. Light is transmitted or passed (specifically, transmitted) so that light enters the second optical fiber 31, and a cylindrical shape that is disposed on the outer periphery of the optical path 81 and reflects light. A reflection portion 82 of the optical path portion 81. Outer width dimension W3 at the end of the fiber body 3 side than the outer width dimension W4 of the core 31c in the first surface 31a of the second optical fiber 31 is small.

In the optical body 8 according to the present embodiment, the first optical fiber body 5 having at least one first optical fiber 51 and the light emitted from the first optical fiber 51 are incident on the first surface 31a. An optical body 8 disposed between the second optical fiber body 3 and the second optical fiber body 3 so that the light emitted from the first optical fiber 51 enters the second optical fiber 31. And an optical path portion 81 through which light is transmitted or passed (specifically, transmitted) and a cylindrical reflecting portion 82 that is disposed on the outer periphery of the optical path portion 81 and reflects light, and the optical path portion The outer width dimension W3 of the end portion 81 on the second optical fiber body 3 side of 81 is smaller than the outer width dimension W4 of the core 31c on the first surface 31a of the second optical fiber 31.

According to such a configuration, the optical body 8 disposed inside the connection body 7 is disposed between the first optical fiber body 5 and the second optical fiber body 3. The optical body 8 includes an optical path portion 81 through which light passes or passes (specifically, passes), and a cylindrical reflection portion 82 that is disposed on the outer periphery of the optical path portion 81 and reflects light. Yes. Accordingly, the light L1 emitted from the first optical fiber 51 is incident on the first surface 31a of the second optical fiber 31 via the optical path portion 81.

Furthermore, the outer width dimension W3 at the end of the optical path 81 on the second optical fiber body 3 side is smaller than the outer width dimension W4 of the core 31c on the first surface 31a of the second optical fiber 31. Thereby, when the light L2 is incident on the first surface 31a of the second optical fiber 31, the light L2 can be prevented from entering the clad 31d of the second optical fiber 31.

The optical fiber device 1 according to the present embodiment includes a detection unit 6 that detects light, and the first optical fiber body 5 includes at least the optical path unit 81 and the first surface 31a of the second optical fiber 31. The detection optical fiber 52 in which the light L3 to L5 reflected by one (specifically both) is incident on the first surface 52a, the first surface 52a side of the detection optical fiber 52, and the first light A bundling portion 53 for bundling the second surface 51b side of the fiber 51, the bundling portion 53 is connected to the connection body 7, and the detecting portion 6 is a second surface of the detecting optical fiber 52. It is the structure of detecting the light radiate | emitted from 52b.

According to such a configuration, at least part of the light L3 to L5 reflected by at least one (specifically, both) of the optical path portion 81 and the first surface 31a of the second optical fiber 31 is a detection optical fiber. 52 is incident on the first surface 52a. The detection unit 6 detects the reflected light L3 to L5 by detecting at least a part of the light emitted from the second surface 52b of the detection optical fiber 52. Thereby, based on the light quantity detected by the detection part 6, the light quantity of the light radiate | emitted from the light source 4 can be calculated or controlled, for example.

Further, the binding unit 53 binds the first surface 52 a side of the detection optical fiber 52 and the second surface 51 b side of the first optical fiber 51. Since the binding portion 53 is connected to the connection body 7, for example, the first optical fiber body 5 (specifically, the first optical fiber 51 and the detection optical fiber 52) is easily connected to the connection body 7. be able to.

Further, in the optical fiber device 1 according to the present embodiment, the optical path portion 81 is made of a translucent material having a refractive index different from that of air and having translucency. It is the structure of arrange | positioning so that it may contact | abut or space apart from the 1st surface 31a (specifically, space apart).

According to such a configuration, the optical path portion 81 is made of a translucent material having a refractive index different from that of air and having translucency. And the optical path part 81 is arrange | positioned so that it may contact | abut or separate from the 1st surface 31a of the 2nd optical fiber 31 (specifically, separate). Thus, the light L1 emitted from the second surface 51b of the first optical fiber 51 is reflected not only when entering the first surface 31a of the second optical fiber 31, but also when exiting from the optical path portion 81. .

Thus, not only the light L5 reflected when entering the first surface 31a of the second optical fiber 31, but also the light L4 reflected when exiting from the optical path portion 81 is the first surface 52a of the detection optical fiber 52. Is detected by the detection unit 6. Accordingly, the amount of light detected by the detection unit 6 is stabilized.

Further, in the optical fiber device 1 according to the present embodiment, the optical path portion 81 is disposed so as to contact or be separated (specifically, separated) from the second surface 51b of the first optical fiber 51. This is a configuration.

According to such a configuration, the optical path portion 81 is disposed so as to contact or be separated (specifically, separated) from the second surface 51 b of the first optical fiber 51. Thereby, the light L1 emitted from the second surface 51b of the first optical fiber 51 is not only when emitted from the optical path portion 81 and when entering the first surface 31a of the second optical fiber 31, but also the optical path portion 81. It is also reflected when it enters.

Thereby, not only the light L4 and L5 that are reflected when exiting from the optical path portion 81 and when entering the first surface 31a of the second optical fiber 31, but also the light L3 that is reflected when entering the optical path portion 81, The light enters the first surface 52 a of the detection optical fiber 52 and is detected by the detection unit 6. Therefore, the amount of light detected by the detection unit 6 is further stabilized.

Further, in the optical fiber device 1 according to the present embodiment, a plurality of the first optical fibers 51 are provided such that light emitted from the plurality of light sources 4 is incident from the respective first surfaces 51a. The one optical fiber body 5 includes a bundling portion 53 that binds the second surface 51b sides of the plurality of first optical fibers 51, and the bundling portion 53 is connected to the connection body 7. .

According to such a configuration, light emitted from the plurality of light sources 4 enters from the first surface 51 a of each first optical fiber 51. The binding unit 53 binds the second surfaces 51 b of the plurality of first optical fibers 51 to each other and is connected to the connection body 7. Thereby, for example, the first optical fiber body 5 (specifically, the plurality of first optical fibers 51) can be easily connected to the connection body 7.

Further, the optical fiber device 1 according to the present embodiment is configured to be an image projection device that uses light emitted from the second surface of the second optical fiber 31 as projection light.

Note that the optical fiber device and the optical body are not limited to the configuration of the above-described embodiment, and are not limited to the above-described effects. It goes without saying that the optical fiber device and the optical body can be variously modified without departing from the gist of the present invention. For example, it is needless to say that configurations, methods, and the like according to various modifications described below may be arbitrarily selected and employed in the configurations, methods, and the like according to the above-described embodiments.

In the optical fiber device 1 and the optical body 8 according to the above-described embodiment, the reflecting portion 82 is formed by vapor-depositing a dielectric multilayer film, metal (for example, aluminum) on the outer periphery of the optical path portion 81. It is a configuration. However, the optical fiber device and the optical body are not limited to such a configuration. For example, in the optical fiber device and the optical body, as shown in FIG. 5, the reflection portion 82 is an air layer formed between the outer periphery of the optical path portion 81 and the inner periphery of the connection body 7. Good.

In the optical fiber device 1 and the optical body 8 according to the above-described embodiment, the optical path portion 81 is disposed so as to be separated from the second surface 51 b of the first optical fiber 51, and the second optical fiber 31 includes the second optical fiber 31. It is the structure that it arrange | positions so that it may space apart from the 1st surface 31a. However, the optical fiber device and the optical body are not limited to such a configuration.

For example, the optical path portion 81 may be configured to be in contact with the second surface 51b of the first optical fiber 51. Further, for example, the optical path portion 81 may be configured to be in contact with the first surface 31 a of the second optical fiber 31. Further, for example, the optical path portion 81 may be configured to be joined (fused or optical contact joined) to the second surface 51b of the first optical fiber 51. For example, as shown in FIG. 5, the optical path portion 81 may be configured to be joined (fused or optical contact joined) to the first surface 31 a of the second optical fiber 31.

Further, in the optical fiber device 1 and the optical body 8 according to the above-described embodiment, the optical path portion 81 is formed of a translucent material and transmits light. However, the optical fiber device and the optical body are not limited to such a configuration. For example, in the optical fiber device and the optical body, as illustrated in FIG. 6, the optical path portion 81 may be formed of air and allow light to pass therethrough.

The optical body 8 according to FIG. 6 includes a base body 83 formed in a cylindrical shape and a cylindrical reflecting portion 82 disposed on the inner periphery of the base body 83. The optical body 8 may have a configuration in which the cylindrical base body 83 is translucent and the cylindrical reflecting portion 82 is disposed on the outer periphery of the base body 83.

Further, in the optical fiber device 1 and the optical body 8 according to the above embodiment, the optical path portion 81 is formed in a columnar shape, and the reflecting portion 82 is formed in a cylindrical shape. However, the optical fiber device and the optical body are not limited to such a configuration. For example, in the optical fiber device and the optical body, the optical path portion 81 may be formed in a prismatic shape, and the reflecting portion 82 may be formed in a rectangular tube shape.

Alternatively, for example, the outer width dimension of the optical path portion 81 may increase from the first optical fiber body 5 side toward the second optical fiber body 3 side. Further, for example, as shown in FIG. 7, the outer width dimension of the optical path portion 81 may be reduced from the first optical fiber body 5 side toward the second optical fiber body 3 side. The optical path portion 81 according to FIG. 7 is formed in a truncated cone shape.

Further, in the optical fiber device 1 according to the above-described embodiment, the first optical fiber body 5 includes a plurality of first optical fibers 51. However, the optical fiber device is not limited to such a configuration. For example, in the optical fiber device, the first optical fiber body 5 may include a single first optical fiber 51.

Further, the optical fiber device 1 according to the above embodiment is configured to include the detection optical fiber 52 and the detection unit 6. However, the optical fiber device is not limited to such a configuration. For example, the optical fiber device may be configured not to include the detection optical fiber 52 and the detection unit 6.

Further, in the optical fiber device 1 according to the above-described embodiment, the image projection unit 10 is configured to be incident in a state where the first to third color lights are separated. However, the optical fiber device is not limited to such a configuration. For example, in the optical fiber device, the image projection unit 10 is incident on the first to third color lights in a combined state, and separates the combined light into first to third color lights. Then, it may be configured to enter the image forming optical system 10b.

Further, the optical fiber device 1 according to the embodiment is configured to be an image projection device. However, the optical fiber device is not limited to such a configuration. For example, the optical fiber device may be an exposure device that performs exposure using light, or may be a lighting device that illuminates a predetermined area.

DESCRIPTION OF SYMBOLS 1 ... Optical fiber device, 2 ... Light source device, 2a ... 1st connection part, 2b ... Light source device main-body part, 2R ... 1st light source device, 2G ... 2nd light source device, 2B ... 3rd light source device, 3 2nd optical fiber body (light guide body) 4 ... Light source 5 ... 1st optical fiber body 6 ... Detection part 7 ... Connection body 8 ... Optical body 10 ... Image projection part 10a ... Uniformity optics System, 10b ... image forming optical system, 10c ... projection optical system, 10d ... image projection main body part, 10e ... second connection part, 11 ... power source, 12 ... control part, 31 ... second optical fiber, 31a ... first surface , 31c ... core, 31d ... clad, 32 ... ferrule, 51 ... first optical fiber, 51a ... first surface, 51b ... second surface, 51c ... core, 51d ... clad, 52 ... optical fiber for detection, 52a ... first 1st surface, 52b ... 2nd surface, 52c ... Core, 52d ... Cladding, 53 ... Bundling , 81 ... optical path section, 81a ... first face, 81b ... second face, 82 ... reflecting portion, 83 ... base body, 100 ... screen

Claims

A first optical fiber body having at least one first optical fiber;
A second optical fiber body having a second optical fiber through which light emitted from the first optical fiber is incident on the first surface;
A cylindrical connection body connecting the first optical fiber body and the second optical fiber body;
An optical body disposed inside the connection body and disposed between the first optical fiber body and the second optical fiber body,
The optical body is disposed on an optical path portion through which light passes or passes so that light emitted from the first optical fiber enters the second optical fiber, and on an outer periphery of the optical path portion, and reflects light. A cylindrical reflection portion,
An optical fiber device in which an outer width dimension at an end of the optical path portion on the second optical fiber body side is smaller than an outer width dimension of a core on the first surface of the second optical fiber.
A detector for detecting light;
The first optical fiber body includes a detection optical fiber in which light reflected by at least one of the optical path portion and the first surface of the second optical fiber is incident on the first surface, and a first of the detection optical fibers. A bundling portion for bundling one surface side and the second surface side of the first optical fiber,
The binding part is connected to the connection body,
The optical fiber device according to claim 1, wherein the detection unit detects light emitted from a second surface of the detection optical fiber.
The optical path portion is made of a translucent material having a refractive index different from that of air and having translucency, and is further disposed so as to contact or be separated from the first surface of the second optical fiber. 2. An optical fiber device according to 2.
4. The optical fiber device according to claim 3, wherein the optical path portion is disposed so as to contact or be separated from the second surface of the first optical fiber.
A plurality of the first optical fibers are provided such that light emitted from a plurality of light sources is incident from each first surface,
The first optical fiber body includes a bundling portion that binds the second surface sides of the plurality of first optical fibers,
The optical fiber device according to any one of claims 1 to 4, wherein the binding portion is connected to the connection body.
The optical fiber device according to any one of claims 1 to 5, wherein the optical fiber device is an image projection device that uses light emitted from the second surface of the second optical fiber as projection light.
Between a first optical fiber body having at least one first optical fiber and a second optical fiber body having a second optical fiber on which light emitted from the first optical fiber is incident on a first surface An optical body arranged,
An optical path portion through which light passes or passes so that light emitted from the first optical fiber enters the second optical fiber, and a cylindrical reflecting portion that is disposed on the outer periphery of the optical path portion and reflects light And comprising
An optical body in which an outer width dimension at an end of the optical path portion on the second optical fiber body side is smaller than an outer width dimension of a core on the first surface of the second optical fiber.