Patent ID: 8059316
Filing Date: 2011-11-15
Classification: H04N

Abstract:
1. An optical device comprising: a laser light emitting portion that emits laser light; a deflector that deflects the laser light emitted from the laser light emitting portion; a first lens through which the laser light reflected by the deflector is transmitted, the first lens refracting the laser light; a second lens through which the laser light having passed through the first lens is transmitted, the second lens refracting the laser light; an adjustment unit, which is provided at the first lens, that adjusts each of a length of a first optical path between the deflector and the first lens and a length of a second optical path between the first lens and the second lens; a mirror disposed in the second optical path, the mirror reflecting the laser light; and a mirror adjustment unit, which adjusts the length of the second optical path by changing a position of the mirror, wherein the mirror adjustment unit corresponds to elliptic eccentric cams whose rotational angles are adjustable, and wherein the elliptic eccentric cams include a set of two adjacent cams, which are provided at the mirror.