JPS58205802A - Illuminating device - Google Patents

Abstract

PURPOSE:To enable the detection of substrate holes adjacent to each other by a constitution wherein a light from a light source is transformed into a spot light by a pinhole lens so that illumination is enabled. CONSTITUTION:The titled device is constituted by a diffusing plate 2 provided in front of a light source lens lamp 1 for diffusing a light into a uniform light, by a pinhole 3 for restricting the light by passing only a part of it therethrough, and by a lens 4 for condensing the light stopped by the pinhole 3. Accordingly, a light projected from the lens lamp 1 is diffused into a uniform light by the diffusing plate 2 and transformed into a spot light by the pinhole 3, and this spot light is condensed without any loss in the quantity thereof by the lens 4. By this constitution, the light can be projected only into an aimed substrate hole 6, while another substrate hole 7 adjacent to the hole 6 is left outside the projection.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an illumination device for detecting the position of a hole or the like formed in a substrate.

Conventionally, when detecting the position of a board hole 6.7 provided adjacent to a board 5 as shown in FIG. It was configured by a diffuser plate 2 provided.

However, in the above-mentioned conventional lighting device, the lens 2 lamp 1
Since the light irradiated from the substrate is converted into uniform light by the diffuser plate 2 and directly illuminates the holes 6.7 of the substrate, the spread of the light causes a large number of holes 6.7 to be illuminated. .

Since light enters the light receiving element 8 from the light receiving element 7, there is a drawback that the position of each board hole 6 and 7 cannot be detected by the light receiving element 8.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide an illumination device that can accurately detect the positions of substrate holes, etc., even if the substrate holes, etc. are adjacent to each other.

That is, the present invention is characterized in that light from a light source can be converted into spot light using a pinhole lens for illumination, thereby making it possible to detect adjacent substrate holes, etc.

The present invention will be specifically described below based on an embodiment shown in FIG.

That is, the lighting device according to the present invention includes a lens lamp 1 that is a light source, a diffusion plate 2 provided in front of the lens lamp 1, and only a part of the light that has been diffused by the diffusion plate 2 and converted into uniform light. It consists of a squeeze pinhole 3 and a lens 4 that condenses the light squeezed by the pinhole 3.

Therefore, the light emitted from the lens lamp 10 is diffused by the diffuser plate 2 into uniform light without any unevenness, converted into a spot light by the pinhole 3, focused by the lens 4 without any loss in light intensity, and then The light can be projected only onto the target substrate hole 6 without interfering with the substrate hole 7 adjacent to it. As a result, the light passing through the board hole 6 is received by, for example, a four-part light receiving element 8, the signals obtained from each light receiving element are compared, and the board 5 or four part light receiving element 8 is moved so that the signals match. By detecting the amount of movement by a detection means (not shown), the position of the board hole B can be detected. By the way, in the above embodiment, the position of the board hole 6 is detected by the four-split light receiving element 8, but it is obvious that the detection is not limited to this embodiment, and that a TV camera, a linear image sensor, etc. may be used. be.

As explained above, according to the present invention, it is possible to detect adjacent substrate holes, etc., which was previously impossible.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a diagram showing a conventional illumination device for detecting the position of a hole in a substrate, etc., and Fig. 2 is a diagram showing a lighting device for detecting the position of a hole in a substrate according to the present invention. It is a diagram showing an example. 1... Lens lamp (light source) 2... Diffusion plate 5... Pinhole 4...
Lens 5... Board 6.7... Board hole
8...4-division light receiving element Fig. 1 Fig. 20

Claims (1)

[Claims] a light source; a diffuser plate that diffuses the light output from the light source;
An illumination device characterized by being equipped with an aperture through which part of the light diffused by the diffusion plate passes, and a condensing lens that condenses the light obtained through the aperture.