JPH0862093A - Device for inspecting light emitting characteristics of lamp - Google Patents

Abstract

PURPOSE: To obtain a device for inspecting light emitting characteristics of a lamp which can easily and accurately inspect the light-quantity level characteristics and directional characteristics which each lamp has. CONSTITUTION: A screening plate 3 with a plurality of transmission holes 4 for transmitting light emitted from a lamp 2 to be inspected is provided so that it can rotate, a light reception plate 6 with a plurality of light reception holes 5 for receiving light through the transmission holes 4 are provided for the screening plate 3, a light reception part 10 with a single light reception element 9 for detecting the quantity of reaching light and a means 11 for introducing application light which is applied to the light reception holes 5 separately to each light reception part 10 a are provided, a rotary position detection means 12 for detecting the relative rotary position relationship between the screening plate 3 and the light reception plate 6 is provided, and the position relationship of each hole is set so that a specific single transmission hole and only the corresponding specific single light reception hole overlap each other in a direction along a rotary shaft core A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for inspecting a light emission characteristic of a lamp.

[0002]

2. Description of the Related Art Conventionally, the light emission characteristics of a lamp have been obtained by obtaining the total amount of emitted light or the power consumption of each lamp and using this as a judgment index.

[0003]

However, for example, as an example of a device using a lamp, there is a device for inspecting the content rate of components contained in grains, the taste value of rice, and the like by a spectroscopic analysis method. The lamp used in such a spectroscopic analysis device has a problem in that the light amount level and the directional characteristic vary. However, the conventionally used lamps (for example, halogen lamps) are
There is a problem that the variation of the directional characteristics is large and the measurement result is affected by changing the lamp. Therefore, an object of the present invention is to easily and accurately inspect the light amount level characteristic and the directional characteristic of each lamp so that the influence can be reduced by using the lamp having the same characteristic even when replacing the lamp. It is to obtain a device for inspecting light emission characteristics of a lamp.

[0004]

In order to achieve this object, a characteristic structure of an apparatus for inspecting light emission characteristics of a lamp according to the present invention is that it has a plurality of transmission holes capable of transmitting irradiation light emitted from a lamp to be inspected. A partition plate provided with rotatably around a predetermined axis of rotation, at a position opposite to the side where the lamp is arranged with respect to the partition plate, at a position opposite to the transmission hole. A light-receiving portion having a plurality of light-receiving holes capable of receiving irradiation light, fixedly provided coaxially with the partition plate, having a single light-receiving element capable of detecting the amount of light reaching, and the light-receiving hole. And a rotation position detecting means for detecting a relative rotation positional relationship between the partition plate around the rotation axis and the light receiving plate. , The plurality of transmissions provided in the partition plate And the plurality of light-receiving holes provided in the light-receiving plate are arranged two-dimensionally in a two-dimensional plane perpendicular to the rotation axis on the corresponding plates, and the transmission holes and In a relative positional relationship with the light receiving hole, only a specific single light receiving hole corresponding to the specific single transmission hole and a specific single light receiving hole in a direction along the axis of rotation are placed in a positional relationship in which they are overlapped with each other. It is arranged, and its action and effect are as follows.

[0005]

In other words, when inspecting the light emission characteristics of the lamp, the lamp is disposed on the front side of the partition plate (the side opposite to the light receiving plate) and the inspection is performed. In this state,
The light emitted from the lamp reaches the partition plate, and also passes through the plurality of transmission holes provided in the plate to reach the light receiving plate. Here, the light reaching the light-receiving plate is light that has penetrated through the plurality of transmission holes, but due to the positional relationship between the transmission holes and the light-receiving holes along the axis of rotation, light is transmitted to only a specific single light-receiving hole (this Is capable of reaching light that has passed through a specific single transmission hole corresponding to the light receiving hole. Then, this light is guided to the light receiving portion by the light introducing means and detected by the light receiving element. On the other hand, the relative rotational positional relationship between the partition plate and the light receiving plate is detected by the rotational position detecting means. Therefore, when the amount of light received by the light receiving unit and the relative rotational position relationship between the partition plate and the light receiving plate are detected simultaneously, the relative rotational position relationship and the position of the light receiving hole in the light receiving state are taken into account,
It is possible to obtain the light amount characteristic at a specific point where the light receiving hole is present. Then, by repeating this operation while sequentially rotating the partition plate, it is possible to detect the light emission characteristic and the directional characteristic of the lamp on the two-dimensional plane substantially orthogonal to the axis of rotation. Here, for example, a sensor in which a large number of light receiving elements are two-dimensionally arranged is provided for the lamp,
It is possible to inspect the light emission characteristics and directional characteristics of the lamp from the output of this sensor (many light receiving elements), but in this case, the characteristics of each light receiving element included in the sensor are likely to differ, and the obtained lamp characteristics are reliable. However, in the present application, there is a single light-receiving element provided in the light-receiving portion, and the light-receiving element is common to all the light-receiving holes, which causes such a problem. There is no.

[0006]

Therefore, even when changing the lamp, for example,
By using lamps having the same characteristics, it is possible to obtain a lamp emission characteristic inspection device capable of easily and accurately inspecting the light amount level characteristic and the directional characteristic of each lamp so that the influence can be reduced. It was Therefore, it becomes possible to select a lamp having similar characteristics rather than replacing the lamp by evaluating the total light amount and the lamp based on the power consumption. As a result, even when the lamp is used in the spectroscopic analysis device, the evaluation of the analysis value by replacing the lamp can be made more reliable.

[0007]

Embodiments of the present application will be described with reference to the drawings. FIG. 1 is a side view of a lamp light emission characteristic inspection device 1 of the present application, and FIG. 2 shows a state of a partition plate 3 provided in the device 1 as viewed from the lamp 2 side. As shown in FIGS. 1 and 2, the device 1 includes a partition plate 3 having a plurality of transmission holes 4 capable of transmitting the irradiation light emitted from the lamp 2 to be inspected.
And a light receiving plate having a plurality of light receiving holes 5 at the position opposite to the side where the lamp 2 is arranged with respect to the partition plate 3 and capable of receiving the irradiation light transmitted through the transmission hole 4. 6 is provided. The partition plate 3 described above is configured to be connected to the rotary shaft 8 extended from the rotating device 7, and the light receiving plate 6 is configured to be coaxial with the rotary shaft 8.
It has a fixed configuration (does not rotate). Therefore, the partition plate 3 and the light receiving plate 6 are configured coaxially, and only the former 3 is rotatable about a predetermined rotation axis A.

The arrangement relationship between the plurality of transmission holes 4 provided in the partition plate 3 and the plurality of light receiving holes 5 provided in the light receiving plate 6 will be described below.
Are arranged two-dimensionally on the corresponding plates 3 and 6 in a two-dimensional plane perpendicular to the rotation axis A, and the relative distance between the transmission hole 4 and the light receiving hole 5 is In the positional relationship, only a specific single transmission hole 4a and a specific single light receiving hole 5a are set to overlap each other in an arbitrary rotation posture in a direction along the rotation axis A. The broken line circles shown in FIG. 2 indicate the arrangement configuration of the plurality of light receiving holes 5 provided in the light receiving plate 6. The light receiving holes 5 are radially distributed radial positions from the central axis side toward the outer peripheral portion. It is distributed at an appropriate density. In the figure,
Regarding the holes on the second and third stages from the central axis side, one on the second stage is skipped in the circumferential direction. On the other hand, the arrangement state of the transmission holes 4 arranged in the partition plate 3 is shown by a solid line circle shown in FIG. The holes 4 are circumferentially shifted and arranged at predetermined intervals only in a specific single radial direction. In FIG. 2, only the positions of the transmission hole 4a and the light receiving hole 5a, which are located in the second stage from the central axis side to the upper side of FIG. The matching specific holes are different in position as the partition plate rotates.

In addition, this device includes a single light receiving element 9
The light receiving section 10 having the above is provided, and the light receiving element 9 can detect the amount of light reaching the light receiving section 10. And
The plurality of light receiving holes 5 provided in the light receiving plate 6 and the light receiving section 10 are individually connected by the optical fiber 11. Therefore, the irradiation light received by the light receiving hole 5 is
The amount of light that is guided to the light receiving unit 10 by the light introducing unit composed of the optical fiber 11 and is reached by the light receiving element 9 is detected.

Rotational position detecting means 12 for detecting the relative rotational positional relationship between the partition plate 3 and the light receiving plate 6 around the rotation axis A is provided, and the relative rotational positional relationship between the partition plate 3 and the light receiving plate 6 is provided. Can be detected. Further, from the rotational position (rotation angle) of the partition plate 3 detected by the rotational position detection means 12 and the element output obtained by the light receiving unit 10, the transmission hole corresponding to the rotational position relationship stored in advance. 4 and the light receiving hole 5 correspond to the combined position of the specific single holes (this is substantially the position of the specific single light receiving hole 5) in the axial direction, and the element output,
An arithmetic processing unit (substantially a computer) 13 for deriving the light emission characteristic of the lamp is provided. That is, as shown in FIG. 3, a two-dimensional plane (X-
The light amount distribution in the Y plane) is derived.

The operation of the device 1 will be described below. When inspecting the emission characteristics of the lamp 2, the partition plate 3 is rotated at a predetermined timing by the operation of the rotating device 7 described above. Then, in this rotating state, the relative rotational position relationship of the partition plate 3 with respect to the light receiving plate 6 is detected by the rotational position detecting means 12 described above. As described above, since there is only one combination in which the transmission hole 4 and the light receiving hole 5 are lined up in the direction along the rotation axis 8 in a specific arbitrary rotational posture, the relative rotational positional relationship is detected. Then, the position of the light detected by the element 9 in the light receiving unit 10 is specified. Then, the above-mentioned arithmetic processing means 13 derives the received light amount distribution on the two-dimensional plane perpendicular to the rotation axis 8 as the light emission characteristic of the lamp 2. An example of this output is shown in FIG. FIG. 3 shows contour lines having the same light amount on the two-dimensional plane (XY plane). Further, as such a light emission characteristic, two-dimensional position coordinates and numerical values representing the light amount on the coordinates are also output as a numerical table. As a result, for example, it is possible to perform highly reliable detection by selecting a lamp that is similar to the emission characteristics of a lamp that has been conventionally used in a spectroscopic analysis device and using it in the device.

[Other Embodiments] In the above embodiment, the light receiving element is provided in the light receiving portion to obtain the two-dimensional light amount distribution to help identify the light emission characteristics. When the array type light receiving element (corresponding to the light receiving element 9 in the above embodiment) is used to receive the spectral light dispersed by these elements and the prism, the light emission characteristics of the lamp are not limited to directivity. Instead, it can be evaluated in terms of wavelength characteristics. With this configuration, when a lamp is selected on the spectroscopic analysis device side, a lamp similar in light amount, directivity, and spectroscopic characteristics can be selectively used, and for example, the spectroscopic analysis device can work well. . Further, in the above-mentioned light emission characteristic inspection device, a calculation processing means is provided, and the relationship between the position of the light detected by the light receiving portion (substantially the position of the light receiving hole) and the received light amount is automatically associated. However, for this, for example, a table showing the positions of the light receiving holes is prepared, and the positions of the light receiving holes are specified according to the positions detected by the rotational position detecting means, and the positions are associated with each other, so that the operator can use them as a light emission characteristic table. You may be able to create it.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a side view of a lamp emission characteristic inspection device.

FIG. 2 is a diagram showing a state of a partition plate viewed from the lamp side.

FIG. 3 is a diagram showing inspection results of light emission characteristics of a lamp.

[Explanation of symbols]

 2 Lamp 3 Partition plate 4 Transmission hole 5 Light receiving hole 6 Light receiving plate 9 Light receiving element 10 Light receiving part 11 Light introducing means 12 Rotation position detecting means A Rotation axis core

Claims (1)

[Claims] 1. A partition plate (3) having a plurality of transmission holes (4) capable of transmitting irradiation light emitted from a lamp (2) to be inspected is rotated around a predetermined rotation axis (A). It is possible to receive the irradiation light transmitted through the transmission hole (4) at a position opposite to the side where the lamp (2) is arranged with respect to the partition plate (3). A light receiving plate (6) having a plurality of light receiving holes (5) fixedly provided coaxially with the partition plate (3), and having a single light receiving element (9) capable of detecting the amount of light reaching it. A part (10) and a light introducing means (11) for individually guiding the irradiation light incident on the light receiving hole (5) to the light receiving part (10), and the light source around the rotation axis (A). The partition plate (3) is provided with a rotational position detecting means (12) for detecting a relative rotational position relationship between the light receiving plate (6), The plurality of transmission holes (4) provided in (3) and the plurality of light receiving holes (5) provided in the light receiving plate (6) are provided on the corresponding rotary plate cores (A) on their corresponding plates. The transmission holes (4) and the light receiving holes (5) are arranged in a two-dimensional plane at right angles so as to be dispersed two-dimensionally.
In a relative positional relationship with the above, the positional relationship in which only the specific single light receiving hole corresponding to the specific single transmission hole in the direction along the rotation axis (A) overlaps each other in any rotational postures A device for inspecting the emission characteristics of the lamps installed.