Title:
光学系、および画像投射装置
Document Type and Number:
Japanese Patent JP7167844
Kind Code:
B2
Abstract:
An optical system (300) includes a light source (101); an illumination optical system (301); and an optical modulator (103). The illumination optical system (301) emits the light to the optical modulator (103) and includes a lens array (14A and 14B); a lens (15); and a light shield (50). The light shield (50) blocks some light rays of the light incident within a range of an effective diameter of the lens (15). The optical modulator (103) emits the light incident on the optical modulator (103) toward a first direction and a second direction different from the first direction. The center of an effective diameter of the lens array (14A and 14B) is offset from the center of the effective diameter of the lens (15) to an opposite side of the light shield (50) in a direction orthogonal to an optical axis of the illumination optical system (301).
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Inventors:
Kei Adachi
Yukako Yamaguchi
Yukako Yamaguchi
Application Number:
JP2019089602A
Publication Date:
November 09, 2022
Filing Date:
May 10, 2019
Export Citation:
Assignee:
株式会社リコー
International Classes:
G03B21/14; G02B5/00; G02B19/00; G02B26/02; G03B21/00
Domestic Patent References:
| JP2008145666A | ||||
| JP2003315733A | ||||
| JP2015230346A | ||||
| JP2004029325A | ||||
| JP2017129847A |
Foreign References:
| US20180067385 | ||||
| US20020126264 | ||||
| US20030202259 | ||||
| US20120162613 |