| 摘要 |
An illumination device includes a light source section including a laser light source, and intermittently emitting, at a predetermined frequency, laser light emitted from the laser light source, an optical element passing the laser light emitted intermittently from the light source section, and a drive section vibrating the optical element at a predetermined vibration frequency. An expression 1 or 2 below is satisfied, where f1 [Hz] denotes the frequency, f2 [Hz] denotes a variable frequency of luminance in illumination light emitted from the optical element as a result of vibration of the optical element, n1 denotes an arbitrary integer of 0 or larger and 10 or smaller, and n2 denotes a predetermined integer of 1 or larger. |n1×f1−f2|≧20  1 |b2×f1−f2|≦̸3  2
|
