Patent ID: 8262235
Filing Date: 2012-09-11
Classification: G02B,G03B,H04N

Abstract:
1. A laser projector, comprising: a laser light source; a projection optical system including a plurality of optical elements to converge and project a laser light from the laser light source to a screen; and a vibration device for cyclically displacing at least one optical element of the plurality of optical elements along an optical axis direction of the laser light so that a position of a minimum spot of the converged laser light displaces in the optical axis direction of the laser light at the screen, wherein the following relationship is satisfied: where: Δ is an amount of displacement of the position of the minimum spot, which displacement is caused by the cyclic displacement of the optical element; W is a spot size of the minimum spot of the laser light; λ is a wave length of the laser light; and π is the circular constant.