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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2018/043247
Kind Code:
Provided is a lighting device that reduces speckles. Provided is a projector that is equipped with said lighting device. This lighting device is provided with: a light source device; a first collimator optical system in which a light beam emitted from the light source device is incident; a light condensing optical system provided at a rear stage of the first collimator optical system; a rod provided at a rear stage of the light condensing optical system; a second collimator optical system provided at a rear stage of the rod; a lens integrator provided at a rear stage of the second collimator optical system; and a superimposed lens provided at a rear stage of the lens integrator, wherein the lens integrator includes a first lens array and a second lens array provided at a rear stage of the first lens array, and a light emitting end surface of the rod is approximately conjugated with a lens surface of the second lens array.

AKIYAMA Koichi (3-5 Owa 3-chom, Suwa-shi Nagano 02, 〒3928502, JP)
Application Number:
Publication Date:
March 08, 2018
Filing Date:
August 23, 2017
Export Citation:
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SEIKO EPSON CORPORATION (1-6 Shinjuku 4-chome, Shinjuku-ku Tokyo, 01, 〒1608801, JP)
International Classes:
F21S2/00; F21V5/04; G03B21/14; F21Y105/10; F21Y113/13; F21Y115/30
Foreign References:
Attorney, Agent or Firm:
WATANABE Kazuaki et al. (2070 Kotobuki Koaka Matsumoto-shi Nagano, 02, 〒3998702, JP)
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