Patent ID: 9176367
Filing Date: 2015-11-03
Classification: F21V,G02B,G02F,G03B,H04N

Abstract:
1. An illumination device comprising: a light source section including a laser light source; a first uniformization optical member receiving light from the light source section; a second uniformization optical member receiving light from the first uniformization optical member; an optical device disposed on an optical path of outgoing light from the light source section; and a drive section vibrating the optical device; wherein the optical device is disposed on an optical path between the first uniformization optical member and the second uniformization optical member; and wherein the second uniformization optical member includes a plurality of unit cells which are two-dimensionally arranged, and an expression (1) is satisfied: where f is a focal length of the unit cell in the second uniformization optical member, Pf is a pitch of the unit cell in the second uniformization optical member, θf is a marginal ray angle in a light flux emitted from the optical device to enter the second uniformization optical member.