| 摘要 |
An illumination device includes: a light source section including a laser light source; a uniformization optical member including a plurality of unit cells which are two dimensionally arranged, and receiving light from the light source section; an optical device disposed on an optical path between the light source section and the uniformization optical member; and a drive section vibrating the optical device, in which an expression (1) is satisfied: {6×f×tan(thetaf)}>Pf (1) where f is a focal length of the unit cell, Pf is a pitch of the unit cell, thetaf is a marginal ray angle in a light flux emitted from the optical device to enter the uniformization optical member.
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