JP2009068944A - Light-receiving unit inspecting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light receiving unit inspecting apparatus with high processing performance, in a simple constitution. <P>SOLUTION: One ends of a plurality of cylinders 101 are opposed to devices D1, D2, ..., Dn to be inspected in remote control light-receiving units RU1, RU2, ..., RUn, respectively. Light-emitting elements S1, S2, ..., Sn as signal sources are installed on one ends of the cylinders 101, respectively. Thus, the light-emitting elements S1, S2, ..., Sn as signal sources are made to emit light simultaneously, while the one ends of the cylinders 101 are made to face the devices D1, D2, ..., Dn to be inspected in the remote control light receiving units RU1, RU2, ..., RUn, respectively, thereby enabling simultaneous inspection of a plurality of devices from among the devices D1, D2, ..., Dn to be inspected. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a light receiving unit inspection device used for inspection of, for example, an infrared remote control light receiving unit.

  The remote control light-receiving unit is inspected by receiving various codes in the home appliance association format or manufacturer-specific format, changing the reach distance, or changing the incident angle of the signal light. For this reason, although the setting of inspection conditions is complicated and the inspection time becomes long, there is a problem.

  Japanese Laid-Open Patent Publication No. 2006-180131 (Patent Document 1) discloses a light receiving unit inspection apparatus including an ND (darkening) filter 303 as shown in FIG. Even if the distance between the signal light emitting element 301 and the light receiving unit 302 is 20 cm to 30 cm, the distance between the signal light emitting element 301 and the light receiving unit 302 is longer than 20 cm to 30 cm. It is possible to perform an inspection equivalent to the inspection in the state in which it is performed.

  Japanese Patent Application Laid-Open No. 2003-214982 (Patent Document 2) discloses a light receiving unit inspection apparatus capable of accurately setting the light emission intensity of a light emitting element.

However, even if the light receiving unit inspections of Patent Documents 1 and 2 are used, the above problem cannot be solved.
JP 2006-180131 A JP 2003-214982 A

  Therefore, an object of the present invention is to provide a light receiving unit inspection apparatus having a simple configuration and high processing capability.

In order to solve the above problems, the light-receiving unit inspection device of the present invention includes:
A plurality of cylinders made of opaque material with one end facing the device under test of the light receiving unit;
A plurality of signal source light emitting elements attached to the other ends of the tubes and emitting light toward the tubes;
An optical attenuator through which light from at least one of the plurality of signal source light emitting elements passes;
And a measuring instrument for supplying a driving current to the light emitting element for signal source and receiving a signal from the device to be inspected.

  According to the light-receiving unit inspection apparatus having the above-described configuration, since a plurality of devices to be inspected can be inspected simultaneously by making the devices to be inspected of the light-receiving unit face one end of each cylinder, the processing capability can be improved.

  Further, since light from at least one of the plurality of signal source light emitting elements passes through the optical attenuator, the light passing through the optical attenuator is used to connect the signal source light emitting element and the device under test. An inspection equivalent to an inspection performed at a distance longer than the actual distance between them can be performed.

  Moreover, since each said cylinder consists of an opaque material, it can prevent that the light in a cylinder goes out of a cylinder and has a bad influence on the test | inspection of another to-be-inspected device.

  In addition, when the interval between the cylinders is set so that one or more light receiving units can be arranged between the cylinders, in two adjacent cylinders, the inspection performed in one cylinder is the inspection performed in the other cylinder. Not easily affected by In this case, if one or more light-receiving units waiting for inspection are arranged between the tubes, and the GND (ground) terminal of the light-receiving unit is grounded, a shielding effect can be obtained between the adjacent tubes.

In the light receiving unit inspection device of one embodiment,
The opaque material is a conductor.

  According to the light receiving unit inspection apparatus of the above embodiment, since the cylinder is made of a conductor, an electromagnetic shield can be provided.

In the light receiving unit inspection device of one embodiment,
Drive supplied to the signal source light emitting element based on data obtained in advance regarding the relationship between the distance between the signal source light emitting element and the light receiving unit and the drive current supplied to the signal source light emitting element. Adjust the current.

  According to the light receiving unit inspection apparatus of the above embodiment, if the drive current supplied to the signal source light emitting element is adjusted based on the previously obtained data, the actual condition between the signal source light emitting element and the device under test is adjusted. A plurality of inspections equivalent to a plurality of distances different from the above distance can be performed. For example, when the actual distance between the signal source light emitting element and the device under test is about 20 cm to 30 cm, the drive current to the signal source light emitting element is adjusted without changing the actual distance. Thereby, the test | inspection equivalent to the test | inspection whose distance between the light emitting element for signal sources and a to-be-inspected device is 6m-8m can be performed.

  Therefore, it is possible to perform inspection while changing the distance between the signal source light emitting element and the device to be inspected without increasing the size of the light receiving unit inspection apparatus. That is, the light receiving unit inspection apparatus can be miniaturized.

In the light receiving unit inspection device of one embodiment,
The optical attenuator is an opaque body provided with a through hole or an optical fiber.

  According to the light receiving unit inspection apparatus of the above embodiment, the light attenuator can attenuate light when the light attenuator is an opaque body provided with a through hole.

  Further, if the optical attenuator is an optical fiber, the light emitted from the signal source light emitting element can be reliably supplied to the device under test by the optical fiber.

In the light receiving unit inspection device of one embodiment,
The optical attenuator is an optical fiber disposed in at least one of the plurality of tubes;
One end of the optical fiber faces the light emitting element for signal source, while the other end of the optical fiber faces the light receiving surface of the device to be inspected,
The plurality of optical fibers are in one of the plurality of tubes, and the light emitted from one other end of the plurality of optical fibers is the same as the light emitted from the other other end of the plurality of optical fibers. Are incident on the light receiving surface of the device to be inspected at different angles.

  According to the light receiving unit inspection apparatus of the above embodiment, the light emitted from one other end of the plurality of optical fibers is inspected at a different angle from the light emitted from the other other end of the plurality of optical fibers. Since the light is incident on the light receiving surface of the device, it is possible to easily perform an inspection performed by changing the incident angle of the signal light with respect to the light receiving surface.

In the light receiving unit inspection device of one embodiment,
The light guided by one of the plurality of optical fibers is incident on the light receiving surface of the device to be inspected as predetermined signal light, and the light guided by the other one of the plurality of optical fibers is disturbed. The light is incident on the light receiving surface of the device to be inspected.

  According to the light receiving unit inspection apparatus of the above embodiment, the light guided by one of the plurality of optical fibers is incident as the predetermined signal light on the light receiving surface of the device to be inspected, and the plurality of optical fibers Since the light guided by the other one of these is incident as disturbance light, noise inspection can be easily performed.

In the light receiving unit inspection device of one embodiment,
The disturbance light is light emitted from a light source having a structure different from that of the signal source light emitting element.

  According to the light-receiving unit inspection apparatus of the above embodiment, the disturbance light is light emitted from a light source having a structure different from that of the light-emitting element for signal source, and therefore noise inspection corresponding to various environments can be performed.

In the light receiving unit inspection device of one embodiment,
A light diffusing plate disposed between the optical attenuator and the device under test;

  According to the light receiving unit inspection apparatus of the above embodiment, since the light diffusing plate is disposed between the optical attenuator and the device to be inspected, the unevenness of the light intensity on the light receiving surface of the light receiving unit is reduced.

  Therefore, even if the position of the light receiving unit relative to one end of the cylinder is shifted, the change in the intensity of light incident on the light receiving unit is small, and the reliability of inspection can be improved.

  According to the light receiving unit inspection apparatus of the present invention, since a plurality of devices to be inspected can be inspected simultaneously by making the devices to be inspected of the light receiving unit face one end of each cylinder, the processing capability can be improved.

  That is, the light receiving unit inspection apparatus of the present invention has a simple configuration and high processing capability.

  Hereinafter, a light receiving unit inspection apparatus according to the present invention will be described in detail with reference to embodiments shown in the drawings.

(First embodiment)
FIG. 1 is a block diagram of a remote control light receiving unit inspection apparatus according to a first embodiment of the present invention.

  The remote control light receiving unit inspection device includes a test head unit TH, a drive unit DU, a switch group SW, a sensor SE, a main controller MC, sub-controllers SC1, SC2,..., SCn, and measurement units MU1, MU2, and so on. ..., MU3, signal light emitting elements S1, S2, ..., Sn and contact probes CP1, CP2, ..., CPn, and remote control light receiving units RU1, RU2, ..., RUn devices D1, D2, ... , Dn. Note that n is an integer of 3 or more. The measurement units MU1, MU2,... MU3 are examples of measuring instruments.

  2 is a schematic front view of the remote control light receiving units RU1, RU2,..., RUn, and FIG. 3 is a schematic side view of the remote control light receiving units RU1, RU2,.

  The remote control light receiving units RU1, RU2,..., RUn each have three lead pins Vcc, Vout, GND. The lead pin Vcc is a power supply voltage terminal, the lead pin Vout is an output terminal, and the lead pin GND is a ground terminal. The lead pins GND are connected to the lead frame 100, and the remote control light receiving units RU1, RU2,..., RUn are integrated. Further, by separating the lead pins GND from the lead frame 100, the remote control light receiving units RU1, RU2,..., RUn can be separated from each other.

  FIG. 4 is a schematic cross-sectional view of the main part of the remote control light-receiving unit inspection device as seen from the front. FIG. 5 is a schematic cross-sectional view of the main part of the remote control light-receiving unit inspection device as seen from the side.

  The remote control light-receiving unit inspection apparatus includes a plurality of cylinders 101 arranged at substantially equal intervals in the left-right direction of FIG. 4 (perpendicular to the paper surface of FIG. 5), and an opaque body 102 arranged in each cylinder 101. And a light diffusing plate 104 through which light from the through hole 103 of the opaque body 102 passes. The opaque body 102 is an example of an optical attenuator.

  Each cylinder 101 is made of an opaque conductor. One of the signal light emitting elements S1, S2,..., Sn is fixed to one end of each cylinder 101. On the other hand, the other end of each cylinder 101 faces one of the remote control light receiving units RU1, RU2,. The interval between the tubes 101 is set so that three of the remote control light receiving units RU1, RU2,.

  The light emitted from the signal light emitting elements S1, S2,..., Sn passes through the light diffusing plate 104 through the through hole 103 of the opaque body 102 and then enters the remote control light receiving units RU1, RU2,. To do. The signal light emitting elements S1, S2,..., Sn are supplied with drive currents from the measurement units MU1, MU2,.

  The opaque bodies 102 have through holes 103 and are arranged one by one in each cylinder 201. The opaque body 102 is made of a material that is impermeable to the light emitted from the signal light emitting elements S1, S2,..., Sn, for example, a thin aluminum plate that has been black anodized.

  Hereinafter, inspection by the remote control light receiving unit inspection apparatus will be described.

  (1) First, after an operator sets the devices to be inspected D1, D2,..., Dn of the remote control light receiving units RU1, RU2,..., RUn (see FIG. 2) in the test head portion TH shown in FIG. Press the test start switch included in the switch group SW. Then, the main controller MC receives the test start signal, and positions and fixes the devices D1, D5,... To be inspected against the other end of the cylinder 101 as shown in FIG. In FIG. 4, the positioning / fixing mechanism portions of the devices D1, D2,..., Dn to be inspected are not shown.

  In the test head portion TH, a plurality of remote control light receiving units RU1, RU2,..., RUn are separated from each other and arranged at substantially equal intervals.

  (2) Next, after the contact probes CP1, CP2,... Are connected to the lead pins Vcc, Vout, GND of the devices under test D1, D5,..., The main controller MC is connected to the sub-controllers SC1, SC2,. Send measurement start signal to SCn. Thus, each of the sub-controllers SC1, SC2,..., SCn receives the measurement start signal and starts measurement. Each of the sub-controllers SC1, SC2,..., SCn executes the same inspection at the same time.

  (3) When the measurement by the sub-controllers SC1, SC2,..., SCn is completed, the main controller MC receives measurement results (determination results) from the sub-controllers SC1, SC2,.

  (4) Thereafter, the contact probes CP1, CP2,... Are separated from the respective lead pins Vcc, Vout, GND of the devices D1, D5,..., And as shown in FIG. Is positioned and fixed so as to face the other end of the cylinder 101.

  Thereafter, the same operations as in the above (2) to (4) are repeated to inspect all of the devices D1, D5,.

  .., Dn of the remote control light receiving units RU1, RU2,..., RUn are thus opposed to one end of each of the cylinders 101, so that a plurality of devices D1, D2,. Can be simultaneously inspected, so that the ability to process the inspection of the devices D1, D2,.

  In addition, since the opaque body 102 having the through hole 103 is disposed between the signal light emitting elements S1, S2,..., Sn and the remote control light receiving units RU1, RU2,. The intensity of light emitted from S1, S2,..., Sn can be reduced by the opaque body 102.

  Therefore, the light having the same light intensity as the light that has traveled longer than the actual distance between the signal light emitting elements S1, S2,..., Sn and the remote control light receiving units RU1, RU2,. The remote control light receiving units RU1, RU2,..., RUn can be incident on the light receiving surfaces. For example, the inspection can be performed in a state equivalent to the state in which the remote control light receiving units RU1, RU2,.

  Further, since the light diffusion plate 104 is disposed between the opaque body 102 and the remote control light receiving units RU1, RU2,..., RUn, the light intensity on the light receiving surface of the remote control light receiving units RU1, RU2,. Unevenness is reduced.

  Therefore, even if the fixed positions of the remote control light receiving units RU1, RU2,..., RUn are shifted, the intensity change of light incident on the remote control light receiving units RU1, RU2,. .

  In the above inspection, the intensity of light incident on the light receiving surfaces of the remote control light receiving units RU1, RU2,..., RUn using the light intensity calibration sample 150 described later is the distance (6 m to 8 m) in the actual use state shown in FIG. The drive current supplied to the signal source light emitting elements S1, S2,...

  Hereinafter, the structure of the light intensity calibration sample and how to obtain the light intensity calibration data will be described.

  The light intensity calibration sample 150 has the structure shown in FIG. More specifically, the light intensity calibration sample 150 includes a light receiving element 151, an amplifier 152, capacitors 153 and 155, a limiter 154, a band pass filter 156, a demodulator 157, an integrator 158, and a comparator 159. The light intensity calibration sample 150 is provided with a band pass filter output terminal BPF in addition to the ground terminal GND, the power supply voltage terminal Vcc, and the output terminal Vout. The ground terminal GND, the power supply voltage terminal Vcc, and the band pass filter output terminal BPF are wire bonded to a lead frame (not shown). The signal voltage output from the bandpass filter output terminal BPF is taken out as an output voltage of the light intensity calibration sample 150 via the demodulator 160, the integrator 161, and the amplifier circuit 162.

  In addition, the lens portion (not shown) of the light intensity calibration sample 150 is molded using the same mold as the remote control light receiving units RU1, RU2,..., RUn. .., RUn have the same optical characteristics as the remote control light receiving units RU1, RU2,.

  The light intensity calibration sample 150 and the signal light emitting element S1 face each other, the distance d between the light intensity calibration sample 150 and the signal light emitting element S1 is changed, and the output voltage of the light intensity calibration sample 150 is changed. Measure.

  FIG. 8 is a graph showing the relationship between the output voltage of the light intensity calibration sample 150 and the distance d.

  From the graph, light intensity calibration data indicating the relationship between the driving current supplied to the signal light emitting element S1 and the distance d is obtained in advance. Each light source light emitting element S1, S2 is used so that the light intensity from each signal light emitting element S1, S2,..., Sn becomes a light intensity corresponding to a predetermined reach using this light intensity calibration data at the time of inspection. ,..., Sn drive current is adjusted. That is, the signal source light emitting elements S1, S2,..., So that the intensity of light incident on the light receiving surfaces of the remote control light receiving units RU1, RU2,. The drive current supplied to Sn is adjusted.

  In the first embodiment, the cylinder 101 is made of an opaque conductor, but may be made of an opaque semiconductor or non-conductor.

(Second Embodiment)
FIG. 9 is a schematic cross-sectional view of the main part of the remote control light-receiving unit inspection device according to the second embodiment of the present invention as seen from the front. FIG. 10 is a schematic cross-sectional view of the main part of the remote control light-receiving unit inspection device as seen from the side.

  The remote control light receiving unit inspection apparatus includes a plurality of tubes 201 arranged at approximately equal intervals in the left-right direction in FIG. 9 (perpendicular to the paper surface of FIG. 10), and a plurality of optical fibers arranged in each tube 201. 202 and a light diffusion plate 204 through which light from the optical fiber 202 passes. The optical fiber 202 is an example of an optical attenuator. 9 and 10 is set to an angle (for example, 30 °) determined as an inspection condition.

  Each cylinder 201 is made of an opaque conductor. Further, five of the signal light emitting elements S10, S11,..., Sn are detachably attached to one end of each cylinder 201 (see FIG. 12). On the other hand, the other end of each cylinder 201 faces one of the remote control light receiving units RU1, RU2,. The interval between the tubes 201 is set such that three of the remote control light receiving units RU1, RU2,.

  Note that n is an integer of 19 or more.

  The light emitted from the signal light emitting elements S10, S11,..., Sn passes through the optical fiber 202 and the light diffusion plate 204, and then enters the remote control light receiving units RU1, RU2,.

  As shown in FIG. 11, five optical fibers 202 are arranged in each cylinder 202. Each of the five optical fibers 202 has one end facing one signal light emitting element S10, S11,..., Sn, and the other end facing one light diffusion plate 204. That is, the number of optical fibers 202, the number of signal light emitting elements S10, S11,..., Sn, and the number of light diffusion plates 204 are in a one-to-one to one-to-one relationship. The optical fiber 202 may be a multimode optical fiber or a single mode optical fiber.

  Five light diffusion plates 204 are arranged in each tube 202. The light emitted from one of the five light diffusion plates 204 is perpendicularly incident on the light receiving surfaces of the remote control light receiving units RU1, RU2,. Further, the light emitted from the other four of the five light diffusion plates 204 is incident on the light receiving surfaces of the remote control light receiving units RU1, RU2,..., RUn at an angle θ (see FIGS. 9 and 10). .

  Further, the remote control light receiving unit inspection apparatus is similar to the first embodiment in that the test head unit TH, the drive unit DU, the switch group SW, the sensor SE, the main controller MC, the sub controllers SC1, SC2, and the like shown in FIG. ..., SCn, measurement units MU1, MU2, ..., MU3, signal light emitting elements S10, S11, ..., Sn, contact probes CP1, CP2, ..., CPn. However, in the second embodiment, the five signal light emitting elements S10, S11,..., Sn are connected to one measurement unit MU1, MU2,. Is different. Further, the measurement units MU1, MU2,..., MU3 supply the drive current to the signal light emitting elements S10, S11,.

  According to the remote control light receiving unit inspection apparatus having the above configuration, in the inspection in which a signal is incident substantially perpendicularly to the light receiving surface of the remote control light receiving units RU1, RU2, ..., RUn, the signal source light emitting element S10 is caused to emit light. Any one of the signal source light emitting elements S11, S12, S13, and S14 is caused to emit light in an inspection in which a signal is incident obliquely on the light receiving surfaces of the units RU1, RU2,.

  Further, in the disturbance light operation inspection of the remote control light receiving units RU1, RU2,..., RUn, the emitted light from the signal source light emitting element S10 is used as signal light, and one of the signal source light emitting elements S11, S12, S13, S14 is used. The emitted light is assumed to be disturbance light. More specifically, in the disturbance light operation inspection, the signal source light emitting element S10 and one of the signal source light emitting elements S11, S12, S13, and S14 are caused to emit light simultaneously. Here, one emitted light of the signal source light emitting elements S11, S12, S13, S14 is equivalent to, for example, 300 lux of natural light when it reaches the light receiving surface of the remote control light receiving units RU1, RU2,. It is set to have a constant strength.

  In the other disturbance light operation test for the remote control light receiving units RU1, RU2,..., RUn, one of the signal source light emitting elements S11, S12, S13, S14 is changed to a light source such as an inverter fluorescent lamp. The light emitted from the light source is disturbance light, and the light emitted from the signal source light emitting element S10 is signal light.

  Further, the remote control light receiving unit inspection apparatus also uses the light intensity calibration sample 150 of FIG. 7 to determine the intensity of light incident on the light receiving surface of the remote control light receiving units RU1, RU2,. The drive current supplied to the signal source light emitting elements S10, S11,..., Sn is adjusted so as to be equal to the intensity of the light traveling 6 m to 8 m).

  In the second embodiment, the cylinder 201 is made of an opaque conductor, but may be made of an opaque semiconductor or non-conductor.

  In the second embodiment, the light emitted from the signal light emitting element S10 is perpendicularly incident on the light receiving surfaces of the remote control light receiving units RU1, RU2,..., RUn, and the signal light emitting elements S11,. The light is incident on the light receiving surfaces of the remote control light receiving units RU1, RU2,..., RUn at an angle θ, but the light emitted from the signal light emitting elements S10, S11,. You may make it inject into the light-receiving surface of RUn at a mutually different angle.

  The remote control light-receiving unit inspection device of the second embodiment may include a plurality of tubes 201 and the plurality of tubes 101 of the first embodiment.

  In the second embodiment, the light emitted from the five signal light emitting elements S10, S11,..., S14 is guided to the remote control light receiving unit RU1 by the optical fiber 202. For example, four signal light emitting elements S10 are provided. , S11,..., S13 are guided to the remote control light receiving unit RU1 by the optical fiber 202, and the light emitted from one signal light emitting element S14 is not guided by the optical fiber 202, but the remote control light receiving unit RU1. You may make it enter into.

  In other words, light from at least one of the plurality of signal light emitting elements S10, S11,... May be incident on the remote control light receiving units RU1, RU2,.

FIG. 1 is a block diagram of a remote control light receiving unit inspection apparatus according to a first embodiment of the present invention. FIG. 2 is a schematic front view of the remote control light receiving unit. FIG. 3 is a schematic side view of the remote control light receiving unit. FIG. 4 is a schematic cross-sectional view of the main part of the remote control light-receiving unit inspection device of the first embodiment. FIG. 5 is another schematic cross-sectional view of the main part of the remote control light-receiving unit inspection apparatus of the first embodiment. FIG. 6 is a schematic cross-sectional view for explaining the inspection by the remote control light-receiving unit inspection apparatus of the first embodiment. FIG. 7 is a schematic configuration diagram of a sample for light intensity calibration. FIG. 8 is a graph showing the relationship between the output voltage and the distance of the light intensity calibration sample. FIG. 9 is a schematic cross-sectional view of the main part of the remote control light-receiving unit inspection device according to the second embodiment of the present invention. FIG. 10 is a schematic cross-sectional view of the main part of the remote control light-receiving unit inspection device of the second embodiment. FIG. 11 is a schematic view of the optical fiber and the light diffusion plate of the second embodiment as viewed from the remote control light receiving unit side. FIG. 12 is a schematic view of the signal light emitting element of the second embodiment as viewed from the side opposite to the remote control light receiving unit side. FIG. 13 is a schematic diagram showing an actual use state of the remote control light-receiving unit of the first and second embodiments. FIG. 14 is a schematic configuration diagram of a conventional light receiving unit inspection apparatus.

Explanation of symbols

101, 201 Tube 102 Opaque body 103 Through hole 104, 204 Light diffusion plate 202 Optical fibers S1, S2,..., Sn Signal light emitting elements RU1, RU2,. MU1, MU2, ..., MU3 measuring unit

Claims (8)

A plurality of cylinders made of opaque material with one end facing the device under test of the light receiving unit;
A plurality of signal source light emitting elements attached to the other ends of the tubes and emitting light toward the tubes;
An optical attenuator through which light from at least one of the plurality of signal source light emitting elements passes;
A light receiving unit inspection apparatus comprising: a measuring device for supplying a driving current to the signal source light emitting element and receiving a signal from the device to be inspected. In the light-receiving unit inspection device according to claim 1,
The light receiving unit inspection apparatus, wherein the opaque material is a conductor. In the photo acceptance unit inspection device according to claim 1 or 2,
Drive supplied to the signal source light emitting element based on data obtained in advance regarding the relationship between the distance between the signal source light emitting element and the light receiving unit and the drive current supplied to the signal source light emitting element. A light receiving unit inspection device characterized by adjusting a current. In the light-receiving unit inspection device according to any one of claims 1 to 3,
The optical attenuator is an opaque body provided with a through hole or an optical fiber. In the light-receiving unit inspection device according to any one of claims 1 to 4,
The optical attenuator is an optical fiber disposed in at least one of the plurality of tubes;
One end of the optical fiber faces the light emitting element for signal source, while the other end of the optical fiber faces the light receiving surface of the device to be inspected,
The plurality of optical fibers are in one of the plurality of tubes, and the light emitted from one other end of the plurality of optical fibers is the same as the light emitted from the other other end of the plurality of optical fibers. Are incident on the light receiving surface of the device to be inspected at different angles. In the light-receiving unit inspection device according to claim 5,
The light guided by one of the plurality of optical fibers is incident on the light receiving surface of the device to be inspected as predetermined signal light, and the light guided by the other one of the plurality of optical fibers is disturbed. A light receiving unit inspection apparatus, wherein the light is incident on the light receiving surface of the device under inspection as light. In the light-receiving unit inspection device according to claim 6,
The disturbance light is a light emitted from a light source having a structure different from that of the signal source light emitting element. In the light-receiving unit inspection device according to any one of claims 1 to 7,
A light receiving unit inspection apparatus comprising a light diffusion plate disposed between the optical attenuator and the device to be inspected.

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