Patent ID: 9121693
Filing Date: 2015-09-01
Classification: B29D,G01B

Abstract:
1. A two-dimensional displacement sensor comprising: an emitter for emitting first laser light incident on a surface of a strip-shaped member from a direction intersecting a thickness direction of the strip-shaped member and emitting second laser light incident on the surface of the strip-shaped member from a direction parallel to the thickness direction of the strip-shaped member, the emitter includes: a displacement measuring unit having a light receiving element for receiving light reflected from the surface of the strip-shaped member and measuring an amount of displacement of the surface of the strip-shaped member from a reflected light receiving position detected by the light receiving element; an optical element for focusing the reflected light on the light receiving element; a switch for switching the laser light to be incident on the surface of the strip-shaped member between the first laser light and the second laser light; a mirror for reflecting the emitted light of the first laser light to be incident from a direction intersecting the thickness direction of the strip-shaped member; a beam splitter for transmitting the emitted light of the first laser between the first laser and the mirror and reflecting the reflected light of the second laser; a second mirror for reflecting emitted light from the third laser to be incident from a direction intersecting the thickness direction of the strip-shaped member; and a second beam splitter for transmitting emitted light from the third laser between the third laser and the second mirror and reflecting reflected light from the first laser, wherein the first and second laser lights are the laser lights in the form of a line, wherein the switch drives and controls either one of the first laser and the second laser only, and wherein the switch drives and controls the third laser when driving and controlling the first laser.