Patent ID: 8426801
Filing Date: 2013-04-23
Classification: G01C

Abstract:
1. An rotator type optical sensing device, comprising: a circuit board; a shell assembled with the circuit board to form a black-body condition space having a light emitting chamber, at least one optical sensing chamber, and a shading chamber spatially communicated with the light emitting chamber and the optical sensing chamber; at least one light emitting member arranged in the light emitting chamber for projecting at least one light beam into the light emitting chamber; a rotator type shading member having a geometric center and a weight center offset from the geometric center, and rotatably restrained within the shading chamber; and at least one optical sensing member arranged in optical sensing chamber to sense the light beam and accordingly send out a sensing signal; wherein the rotator type shading member includes a first weight portion and a second weight portion, and the weight of the first weight portion is greater than the weight of the second weight portion; and wherein the first weight portion has a first shading surface, the second weight portion has a second shading surface, and the area of the first shading surface is greater than the area of the second shading surface.