JP2016071040A - Fiber optic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical fiber device capable of suppressing a reduction in accuracy of detecting abnormality of an optical fiber.SOLUTION: An optical fiber device comprises: at least one optical fiber 31 in which first light L1 and second light L2 having a wavelength different from a wavelength of the first light are incident on a first face 31a thereof; and a detection part 43 for detecting the second light L2. The optical fiber 31 is provided on a second face 31b thereof with a reflection part 31c that transmits the first light L1 and reflects the second light L2. The detection part 43 detects the second light L2 that is reflected by the reflection part 31c and emitted from the first face 31a.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an optical fiber device including an optical fiber.

  Conventionally, as an optical fiber device including an optical fiber, an optical fiber device in which first light and second light having different wavelengths are incident on a first surface of an optical fiber is known (for example, a patent). Reference 1). The optical fiber device reflects only the second light from the first and second lights emitted from the second surface of the optical fiber by the reflecting member and detects the second light reflected by the reflecting member. doing.

  The second light reflected by the reflecting member is detected after being incident from the second surface of the optical fiber and emitted from the first surface. Based on the detected light, it is possible to detect abnormalities in the optical fiber, such as optical fiber breakage, optical fiber degradation, optical fiber dropout, and the like.

  By the way, in the optical fiber device according to Patent Document 1, the light emitted from the second surface of the optical fiber is reflected by the reflecting member and is again incident on the second surface of the optical fiber. It may be affected (for example, deterioration of the reflecting member). In such a case, the accuracy of detecting the abnormality of the optical fiber is lowered because the accuracy of the detected light is lowered.

Japanese National Patent Publication No. 05-505250

  Therefore, in view of such circumstances, an object of the present invention is to provide an optical fiber device capable of suppressing a decrease in accuracy in detecting an abnormality of an optical fiber.

  The optical fiber device according to the present invention includes at least one optical fiber in which the first light and the second light having a wavelength different from the wavelength of the first light are incident on the first surface; A detection unit that detects second light, and the optical fiber includes a reflection unit that transmits the first light and reflects the second light on a second surface, and the detection unit includes: The second light reflected by the reflecting portion and emitted from the first surface is detected.

  As described above, the optical fiber device according to the present invention has an excellent effect that the accuracy of detecting an abnormality in the optical fiber can be suppressed.

1 is an overall schematic configuration diagram of an optical fiber device according to an embodiment. It is a principal part schematic block diagram of the optical fiber apparatus which concerns on the same embodiment, Comprising: It is a figure explaining the light which injects into the 1st surface of an optical fiber. It is a principal part schematic block diagram of the optical fiber apparatus which concerns on the same embodiment, Comprising: It is a figure explaining the light which injects into the reflection part of an optical fiber. It is a principal part schematic block diagram of the optical fiber apparatus which concerns on other embodiment, Comprising: It is a figure explaining the light which injects into the 1st surface of an optical fiber. It is a principal part schematic block diagram of the optical fiber apparatus which concerns on the same embodiment, Comprising: It is a figure explaining the light which injects into the reflection part of an optical fiber.

<First Embodiment>
Hereinafter, a first embodiment of the optical fiber device will be described with reference to FIGS. In each figure (the same applies to FIGS. 4 and 5), 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 includes a plurality (three in the present embodiment) of light source devices 2 (2R, 2G, 2B) that emit light of different colors, and light to which light emitted from the light source device 2 is incident. And a fiber unit 3. The optical fiber unit 3 includes two optical fibers 31, 31, and is a so-called bundle structure in which the two optical fibers 31, 31 are bundled on the other side.

  The optical fiber device 1 includes an image projection unit 10 that generates an optical image with the light emitted from the optical fiber unit 3 and projects the optical image on a screen 100. 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 image projection unit 10 is incident in a state where the first to third color lights are separated by the plurality of light source devices 2 and the plurality of optical fiber units 3.

  The light source device 2 includes two light source units 4 and 4 that emit light, and a main body 5 that accommodates each light source unit 4. The main body 5 includes connection portions 5 a and 5 a that are connected to one end of the optical fiber 31 of the optical fiber unit 3. The light source device 2 may be configured to include one or three or more light source units 4.

  The image projection unit 10 receives the light emitted from each light source device 2 through the optical fiber unit 3 to generate an optical image and the light image emitted from the image optical system 13. Then, a projection optical system (for example, a projection lens) 14 that projects onto the screen 100 is provided. Further, the image projection unit 10 includes an image projection main body unit 15 that accommodates the optical systems 13 and 14. The image projection main body 15 includes a plurality of connecting portions 15 a that are connected to the other end of the optical fiber 31 of each optical fiber unit 3.

  The image optical system 13 includes a polarization beam splitter 13a that transmits only a predetermined polarization component of the light emitted from the light source device 2, and spatial modulation that converts the light emitted from the polarization beam splitter 13a into an optical image. An element 13b and a dichroic prism 13c that synthesizes the light transmitted through each spatial modulation element 13b are provided. The image optical system 13 includes a collimator lens 13d that collimates the light emitted from each optical fiber 31, and a reflection mirror 13e that reflects the laser light emitted from the first and third light source devices 2R and 2B. And.

  In the present embodiment, each spatial modulation element 13b is a transmissive liquid crystal element. The image optical system 13 may include a spatial modulation element 13b that is a reflective liquid crystal element or a digital micromirror device.

  2 and 3, the light source unit 4 includes a first light source unit 41 that emits the first light L1, a second light source unit 42 that emits the second light L2, and a second light source unit 42. A detection unit 43 for detecting the light L2 and a substrate 44 having an electric circuit are provided. The light source unit 4 includes an optical system 45 disposed between the light source units 41 and 42 and the detection unit 43 and the optical fiber unit 3.

  In the present embodiment, the first light L1 is visible light. For example, the first light source unit 41 in the first light source device 2R emits light having a wavelength of 590 to 693 nm, and the first light source unit 41 in the second light source device 2G has a wavelength of 498 to 580 nm. One light is emitted, and the first light source unit 41 in the third light source device 2B emits light having a wavelength of 410 to 496 nm. 2 and 3 (the same applies to FIGS. 4 and 5), the first light L1 is indicated by a two-dot chain line.

  The second light L2 has a wavelength longer than the wavelength of the first light L1. In the present embodiment, the second light L2 is infrared light. For example, the second light source unit 42 in each light source device 2 emits light having a wavelength of 1200 to 2000 nm. 2 and 3 (the same applies to FIGS. 4 and 5), the second light L2 is indicated by a broken line.

  The first light source unit 41 includes a plurality (three in FIG. 2 and FIG. 3) of semiconductor lasers 41a that emit the first light L1. The second light source unit 42 includes a semiconductor laser 42a that emits the second light L2. The detection unit 43 includes a light receiving element 43a that receives the second light L2. The semiconductor lasers 41 a and 42 a and the light receiving element 43 a are mounted on the same substrate 44.

  The optical system 45 includes a plurality of collimator lenses 45a that convert the light L1 and L2 emitted from the semiconductor lasers 41a and 42a into parallel light, and a plurality of reflection mirrors 45b that reflect the lights L1 and L2 emitted from the collimator lens 45a. And a converging lens 45c for converging the lights L1 and L2 reflected by the reflecting mirror 45b so as to be incident on the first surface 31a of the optical fiber 31. The optical system 45 includes a reflection mirror 45d that reflects the light L2 toward the light receiving element 43a.

  The optical fiber unit 3 includes a bundling portion 32 that binds the other side of the plurality of optical fibers 31, 31, that is, the second surface 31 b side. The optical fiber 31 includes a reflecting portion 31c that transmits the first light L1 and reflects the second light L2 on the second surface 31b. For example, the reflecting portion 31 c is formed by forming an infrared light reflecting film on the second surface 31 b of the optical fiber 31 by vacuum deposition or sputtering.

  The configuration of the optical fiber device 1 according to the present embodiment is as described above. Next, referring to FIGS. 2 and 3 for a method of detecting an abnormality in the optical fiber 31 of the optical fiber device 1 according to the present embodiment. And explain.

  As shown in FIG. 2, the first light L <b> 1 emitted from each first light source unit 41 and the second light L <b> 2 emitted from the second light source unit 42 pass through an optical system 45. , Is incident on the first surface 31 a of the optical fiber 31. The lights L1 and L2 incident on the optical fiber 31 are propagated through the optical fiber 31 and reach the reflecting portion 31c disposed on the second surface 31b of the optical fiber 31.

  At this time, as shown in FIG. 3, the first light L <b> 1 passes through the reflecting portion 31 c and is emitted toward the image projecting portion 10. That is, the optical fiber device 1 that is an image projection device uses the first light L1 transmitted through the reflecting portion 31c of the optical fiber 31 as projection light.

  On the other hand, the second light L2 is reflected by the reflecting portion 31c and emitted from the first surface 31a of the optical fiber 31. Thereafter, the second light L2 passes through the converging lens 45c, and a part of the transmitted second light L2 is reflected by the reflection mirror 45d and then received by the detection unit 43. In the present embodiment, the detection unit 43 detects the second light L2 that has passed through the vicinity of the optical axis of the converging lens 45c (around the center portion).

  Thereby, the optical fiber 31 is broken, the optical fiber 31 is deteriorated, or the end of the optical fiber 31 of the optical fiber unit 3 on the one side (the first surface 31a side) is connected to the connection part 5a of the main body part 5. In the case of deviation, the amount of the second light L2 detected by the detection unit 43 decreases. Therefore, such an abnormality of the optical fiber 31 can be detected.

  The control unit 12 determines whether the optical fiber 31 is normal or abnormal based on the light amount of the second light L2 detected by the detection unit 43. Then, when the control unit 12 determines that the optical fiber 31 is abnormal, the control unit 12 controls the power source 11 so that the power source 11 stops supplying electricity to the light source units 41 and 42, and also to the outside. Output (alarm output, display output).

  Although not shown in FIGS. 2 and 3, a plurality of detection units 43 are provided. Specifically, the detection unit 43 is provided for each light source unit 4. Thereby, the abnormality of the optical fiber 31 can be detected for each optical fiber 31.

  As described above, in the optical fiber device 1 according to the present embodiment, the first light L1 and the second light L2 having a wavelength different from the wavelength of the first light L1 are incident on the first surface 31a. At least one optical fiber 31 and a detection unit 43 that detects the second light L2. The optical fiber 31 transmits the first light L1 and reflects the second light L2. The second surface 31b includes a reflecting portion 31c that performs the detection, and the detection unit 43 detects the second light L2 that is reflected by the reflecting portion 31c and emitted from the first surface 31a.

  According to such a configuration, the optical fiber 31 includes the reflecting portion 31c that transmits the first light L1 and reflects the second light L2 on the second surface 31b. As a result, when the first light L1 and the second light L2 having a wavelength different from the wavelength of the first light L1 are incident on the first surface 31a of the optical fiber 31, the first light L1. The second light L2 is reflected by the reflecting portion 31c and emitted from the first surface 31a of the optical fiber 31 while passing through the reflecting portion 31c.

  Then, the detection unit 43 detects the second light L2 emitted from the first surface 31a of the optical fiber 31. Accordingly, the second light L2 is detected by the detection unit 43 without being affected by disturbance on the downstream side (for example, the image projection unit 10) from the second surface 31b of the optical fiber 31. Therefore, it can suppress that the precision which detects abnormality of the optical fiber 31, such as the bending of the optical fiber 31, the degradation of the optical fiber 31, and the dropping of the optical fiber 31, falls.

  In addition, the optical fiber device 1 according to the present embodiment includes a bundling portion 32 that binds the second surfaces 31b of a plurality of the optical fibers 31 and 31, and the detection unit 43 includes the optical fiber 31. In order to detect the second light L2 emitted from the first surface 31a for each optical fiber 31, a plurality of the second lights L2 are provided.

  According to such a configuration, the binding unit 32 binds the plurality of optical fibers 31, 31 on the second surface 31 b side. And since the reflection part 31c is arrange | positioned at the 2nd surface 31b of each optical fiber 31, it prevents that the 2nd lights L2 and L2 which injected from the 1st surface 31a of each optical fiber 31 mix. doing.

  Further, since a plurality of detection units 43 are provided, the second light L2 emitted from the first surface 31a of the optical fiber 31 is detected for each optical fiber 31 by each detection unit 43. Thereby, abnormality can be detected for each optical fiber 31 with respect to the plurality of optical fibers 31 and 31 in which the second surface 31b side is bundled.

  In the optical fiber device 1 according to the present embodiment, the first light L1 is visible light, and the second light L2 has a wavelength longer than the wavelength of the first light L1. The configuration is that it is infrared light.

  According to such a configuration, the first light L1 is visible light, and the second light L2 is infrared light. Here, the lights L1 and L2 are attenuated when passing through the optical fiber 31. Such attenuation is generally greater the shorter the wavelength. Therefore, since the second light L2 is infrared light and has a wavelength longer than the wavelength of visible light that is the first light L1, attenuation when passing through the optical fiber 31 can be suppressed. .

  Thereby, the output of the second light source unit 42 (that is, the amount of the emitted second light L2) can be reduced. Even when the length of the optical fiber 31 is changed with respect to the same light source unit 4 (particularly, the length of the optical fiber 31 is increased), the attenuation of the second light L2 is small. It is possible to reduce the frequency with which adjustment of the threshold value for determining an abnormality is necessary.

  The optical fiber device 1 according to this embodiment includes a first light source unit 41 that emits the first light L1 and a second light source unit 42 that emits the second light L2. This is the configuration.

  Further, the optical fiber device 1 according to the present embodiment includes a substrate 44 having an electric circuit, the first light source unit 41 includes a semiconductor laser 41a that emits the first light L1, and the second light source unit 41 The light source unit 42 includes a semiconductor laser 42a that emits the second light L2, and the detection unit 43 includes a light receiving element 43a that receives the second light L2, and each of the semiconductor lasers 41a and 42a and the light receiving unit. The element 43 a is configured to be mounted on the same substrate 44.

  According to such a configuration, the first light source unit 41 includes the semiconductor laser 41a that emits the first light L1, and the second light source unit 42 emits the second light L2. The detection unit 43 includes a light receiving element 43a that receives the second light L2. The semiconductor lasers 41 a and 42 a and the light receiving element 43 a are mounted on the same substrate 44. Thereby, for example, wiring for each of the semiconductor lasers 41a and 42a and the light receiving element 43a may be performed on the substrate 44, so that the wiring can be simplified.

  The optical fiber device 1 according to the present embodiment is an image projection device that uses the first light L1 transmitted through the reflecting portion 31c of the optical fiber 31 as projection light.

Second Embodiment
Next, a second embodiment of the optical fiber device 1 will be described with reference to FIGS. 4 and 5. 4 and FIG. 5, the parts denoted by the same reference numerals as those in FIG. 1 to FIG. 3 represent elements having substantially the same configuration or substantially the same function (action) as the first embodiment. The description will not be repeated.

  The light source unit 4 includes a third light source unit 46 that emits the third light L3. The third light source unit 46 includes a semiconductor laser 46a that emits the third light L3. The semiconductor lasers 41a, 42a, 46a and the light receiving element 43a are mounted on the same substrate 44.

  The third light L3 is light having a wavelength longer than that of the first light L1 and shorter than that of the second light L2. In the present embodiment, the third light L3 is infrared light. For example, in each light source device 2, the second light source unit 42 emits light having a wavelength of 1200 to 2000 nm, and the third light source unit 46 emits light having a wavelength of 780 to 1200 nm.

  4 and 5, the third light L3 is indicated by a one-dot chain line. Note that the third light L3 may be light having a wavelength longer than that of the first light L1 and longer than that of the second light L2.

  The optical fiber unit 3 includes one optical fiber 31. The reflecting portion 31c disposed on the second surface 31b of the optical fiber 31 is configured to transmit the first light L1 and the third light L3 and reflect the second light L2. .

  The image projection unit 10 includes a separation optical system 16 that separates the first light L1 and the third light L3, and a second detection unit 17 that detects the third light L3 separated by the separation optical system 16. It has. In the present embodiment, the detection unit 43 of the light source device 2 is referred to as a first detection unit 43.

  The separation optical system 16 is disposed between the collimator lens 13d of the image optical system 13 and the polarization beam splitter 13a (or the reflection mirror 13e) (see FIG. 1). In the present embodiment, the separation optical system 16 is a dichroic mirror that transmits the first light L1 and reflects the third light L3, and the second detection unit 17 is a light receiving element.

  Next, a method for detecting an abnormality in the optical fiber 31 of the optical fiber device 1 according to the present embodiment will be described with reference to FIGS.

  As shown in FIG. 4, the first light L <b> 1 emitted from each first light source unit 41, the second light L <b> 2 emitted from the second light source unit 42, and emitted from the third light source unit 46. The third light L3 thus made is incident on the first surface 31a of the optical fiber 31 via the optical system 45. The lights L1, L2, and L3 incident on the optical fiber 31 are propagated through the optical fiber 31 and reach the reflecting portion 31c disposed on the second surface 31b of the optical fiber 31.

  At this time, as shown in FIG. 5, the first light L <b> 1 and the third light L <b> 3 are transmitted through the reflecting portion 31 c and emitted toward the image projecting portion 10. On the other hand, the second light L2 is reflected by the reflecting portion 31c and emitted from the first surface 31a of the optical fiber 31. Thereafter, the second light L2 passes through the converging lens 45c, and a part of the transmitted second light L2 is reflected by the reflection mirror 45d and then received by the first detection unit 43.

  In addition, the first light L1 and the third light L3 that have passed through the reflecting portion 31c are incident on the image projecting portion 10, and are incident on the separation optical system 16 after passing through the collimator lens 13d. At this time, the first light L1 passes through the separation optical system 16 and is emitted toward the image optical system 13. That is, the optical fiber device 1 that is an image projection device passes through the reflection portion 31 c of the optical fiber 31 and is emitted from the separation optical system 16 toward the polarization beam splitter 13 a (or the reflection mirror 13 d) of the image optical system 13. The first light L1 is used as projection light. On the other hand, the third light L 3 is reflected by the separation optical system 16 and then received by the second detection unit 17.

  Thereby, the optical fiber 31 is broken, the optical fiber 31 is deteriorated, or the end of the optical fiber 31 of the optical fiber unit 3 on the one side (the first surface 31a side) is connected to the connection part 5a of the main body part 5. In the case of deviation, the light amount of the second light L2 detected by the first detection unit 43 decreases, and the light amount of the third light L3 detected by the second detection unit 17 decreases. Therefore, such an abnormality of the optical fiber 31 can be detected.

  Further, when the end of the other side (second surface 31 b side) of the optical fiber 31 of the optical fiber unit 3 is disengaged from the connection part 15 a of the image projection main body part 15, the first detection part 43 detects it. The amount of the second light L2 to be performed does not decrease, but the amount of the third light L3 detected by the second detection unit 17 decreases. Therefore, such an abnormality of the optical fiber 31 can be further detected.

  And the control part 12 is normal of the optical fiber 31 based on the light quantity of the 2nd light L2 detected by the 1st detection part 43, and the light quantity of the 3rd light L3 detected by the 2nd detection part 17. FIG. Or, determine abnormality. Specifically, when both the light amounts of the lights L2 and L3 detected by the detection units 43 and 17 are reduced, the control unit 12 breaks the optical fiber 31, deteriorates the optical fiber 31, It is determined by the first detection unit 43 that the end on one side (first surface 31a side) of the optical fiber 31 of the fiber unit 3 is determined to be the first abnormality that is disconnected from the connection part 5a of the main body part 5. When the amount of the third light L3 detected by the second detector 17 does not decrease and the amount of the third light L3 detected by the second detector 17 decreases, the other side of the optical fiber 31 of the optical fiber unit 3 (second Is determined as a second abnormality in which the end portion on the surface 31b side of the image projection main body portion 15 is disengaged from the connection portion 15a.

  The optical fiber device is not limited to the configuration of the above-described embodiment, and is not limited to the above-described effects. It goes without saying that the optical fiber device can be variously modified without departing from the gist of the present invention. For example, the configurations and methods of the plurality of embodiments described above may be arbitrarily adopted and combined (the configurations and methods according to one embodiment may be combined with the configurations and methods according to the other embodiments). Further, it is of course possible to arbitrarily select configurations, methods, and the like according to various modifications described below and adopt them in the configurations, methods, and the like according to the above-described embodiments.

  In the optical fiber device 1 according to the first embodiment, the optical fiber unit 3 includes two optical fibers 31, 31. In the optical fiber device 1 according to the second embodiment, The optical fiber unit 3 is configured to include one optical fiber 31. However, the optical fiber device is not limited to such a configuration. For example, in the optical fiber device, the optical fiber unit 3 may include three or more optical fibers 31.

  In the optical fiber device 1 according to the above-described embodiment, the detection units 43 and 17 are so-called optical sensors that detect the amount of light received. However, the optical fiber device is not limited to such a configuration. For example, in the optical fiber device, the detection units 43 and 17 may be so-called heat sensors that detect the amount of heat received.

  In the optical fiber device 1 according to the embodiment, the first light L1 is visible light, and the second light L2 (and the third light L3) is infrared light. is there. However, the optical fiber device is not limited to such a configuration. For example, the optical fiber device may be configured such that the first light L1 is at least one of ultraviolet light and visible light. Further, for example, in the optical fiber device, the second light L2 (and / or the third light L3) may be configured to be ultraviolet light, and at a wavelength different from the wavelength of the first light L1. It may be configured that the visible light is present.

  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 with the first to third color lights combined and separates the combined light into first to third color lights. Then, it may be configured to enter the image optical system 13.

  In addition, 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 configured to be an exposure device that performs exposure using light.

  In the optical fiber device, the second light source unit 42 and the third light source unit 46 may emit light L2 and L3 continuously, and emit light L2 and L3 intermittently. It may be configured to do.

  In the optical fiber device, for example, when the device is started, the second light source unit 42 emits the second light L2 with a small output, and then the control unit 12 indicates that the optical fiber 31 is normal. After the determination, each light source unit 41, 42 (, 46) may output each light L1, L2 (, L3) with a rated output.

  DESCRIPTION OF SYMBOLS 1 ... Optical fiber apparatus, 2 ... Light source apparatus, 2R ... 1st light source apparatus, 2G ... 2nd light source apparatus, 2B ... 3rd light source apparatus, 3 ... Optical fiber unit, 4 ... Light source unit, 5 ... Main-body part DESCRIPTION OF SYMBOLS 5a ... Connection part, 10 ... Image projection part, 11 ... Power supply, 12 ... Control part, 13 ... Image optical system, 13a ... Polarizing beam splitter, 13b ... Spatial modulation element, 13c ... Dichroic prism, 13d ... Collimator lens, 13e DESCRIPTION OF SYMBOLS ... Reflection mirror, 14 ... Projection optical system, 15 ... Image projection main body part, 15a ... Connection part, 16 ... Separation optical system, 17 ... 2nd detection part, 31 ... Optical fiber, 31a ... 1st surface, 31b ... 2nd surface, 31c ... reflection part, 32 ... bundling part, 41 ... 1st light source part, 41a ... semiconductor laser, 42 ... 2nd light source part, 42a ... semiconductor laser, 43 ... (1st) detection part 43a ... light receiving element, 4 DESCRIPTION OF SYMBOLS ... Board | substrate, 45 ... Optical system, 45a ... Collimator lens, 45b ... Reflection mirror, 45c ... Converging lens, 45d ... Reflection mirror, 46 ... 3rd light source part, 46a ... Semiconductor laser, 100 ... Screen, L1 ... 1st Light, L2 ... second light, L3 ... third light

Claims (6)

At least one optical fiber in which the first light and the second light having a wavelength different from the wavelength of the first light are incident on the first surface;
A detection unit for detecting the second light,
The optical fiber includes a reflection portion that transmits the first light and reflects the second light on a second surface;
The detection unit is an optical fiber device that detects the second light reflected by the reflection unit and emitted from the first surface. A bundling portion for bundling the second surface sides of the plurality of optical fibers;
2. The optical fiber device according to claim 1, wherein a plurality of the detection units are provided to detect the second light emitted from the first surface of the optical fiber for each optical fiber. The first light is visible light,
The optical fiber device according to claim 1 or 2, wherein the second light is infrared light having a longer wavelength than the wavelength of the first light. A first light source unit that emits the first light;
The optical fiber device according to claim 1, further comprising: a second light source unit that emits the second light. Comprising a substrate having an electrical circuit;
The first light source unit includes a semiconductor laser that emits the first light,
The second light source unit includes a semiconductor laser that emits the second light,
The detection unit includes a light receiving element that receives the second light,
5. The optical fiber device according to claim 4, wherein each of the semiconductor lasers and the light receiving element are mounted on the same substrate. 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 the first light transmitted through the reflecting portion of the optical fiber as projection light.

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