Patent ID: 7164111
Filing Date: 2007-01-16
Classification: G01J

Abstract:
1. A light beam detection device that receives invisible light and emits visible light in response to the received invisible light, the device comprising: a light-receiving means for receiving an invisible light beam and outputting a detection signal; a light detection circuit for generating and outputting a light-emission signal based on the detection signal; a light-emitting means for emitting visible light based on the light-emission signal; a detection portion on which the light-receiving means and the light-emitting means are arranged close together; a support for supporting the detection portion; and a driving means for moving the support in a reciprocative manner in an X axis direction and a Y axis direction to form a detection region with the detection portion, wherein the light-emitting means forms an afterimage on the detection region when the invisible light beam irradiates the detection region.