Patent ID: 9632321
Date: 2017-04-25
CPC Classifications: G02B,G03B

Claim:
1. An illumination device comprising: a light source that emits first light at a first wavelength; an integrator optical system on which the first light emitted from the light source is incident; a wavelength conversion element that converts the first light transmitting through the integrator optical system into second light at a second wavelength different from the first wavelength; a wavelength separation element that is provided on an optical path of the first light between the integrator optical system and the wavelength conversion element; a pickup optical system that is provided between the wavelength conversion element and the wavelength separation element and receives the first light and the second light; and a chromatic aberration-correcting optical element that is provided in at least one positron, the at least one position including: (i) a position between the integrator optical system and the wavelength separation element on the optical path of the first light; and (ii) a position downstream of the wavelength separation element on an optical path of the second light.