Pin hole detector

Abstract

A pin hole detector, wherein light (L) passed through a pin hole (P) along a Z-axis direction is bound to a light detection element (4) but, since the advancing direction of noise light other than the light passed through the pin hole (P) is tilted relative to the Z-axis, the binding of the noise light to the light detection element (4) is limited by first and second optical means (1, 2) limiting an incidence angle, whereby the detector does not necessarily need a closed space when detecting, and can easily detect the pin hole (P).

Description

technical field [0001] The present invention relates to pinhole detectors. Background technique [0002] Conventionally, detection of pinholes formed in thin films such as metals and resins has been performed. In order to detect the pinholes formed by the rubber-like film, the film can be used to form a part of a closed container, and the container can be filled with liquid to detect whether the liquid leaks from the container. On the other hand, in order to detect pinholes formed in the metal thin film, the thin film can be used to constitute a part of a sealed dark box, and whether or not light passes through the pinholes can be detected inside the dark box. That is to say, no matter what kind of detection, an occluded space is required. Contents of the invention [0003] But detection with occluded space is not very easy, and there are many cases where detection with occluded space cannot be performed. F...

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Problems solved by technology

That is to say, no matter what kind of detection, it needs an occlusion space

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