Title:
光学系、および画像投射装置
Document Type and Number:
Japanese Patent JP7327106
Kind Code:
B2
Abstract:
An optical system (300) includes an optical modulation element (103) to reflect an incident light (250) in a different direction, and an illumination optical system (301) through which light emitted from a light source (101) is emitted toward the optical modulation element (103). The illumination optical system (301) includes a lens array (14A, 14B), a lens (15) disposed in an order listed from an upstream side of an optical path, and a shielding part (50) disposed upstream from the lens (15) on the optical path. The shielding part (50) shields light incident on an effective diameter of the lens (15). In a direction perpendicular to an optical axis of the light emitted from the light source (101), the optical axis (101A) is shifted from a center position (15M) of the effective diameter of the lens (15) in an opposite direction with reference to the shielding part (50).
Inventors:
Kei Nojima
Application Number:
JP2019210143A
Publication Date:
August 16, 2023
Filing Date:
November 21, 2019
Export Citation:
Assignee:
株式会社リコー
International Classes:
G03B21/14; G02B27/01; G03B21/00; H04N5/74
Domestic Patent References:
| JP2015108706A | ||||
| JP2008145666A | ||||
| JP2006113255A | ||||
| JP2003322822A |
Foreign References:
| WO2011108077A1 | ||||
| US20120162613 | ||||
| US20160041458 |
Previous Patent: Braking control device
Next Patent: IMAGE INFORMATION TRANSMISSION CONFIRMATION METHOD AND FACSIMILE SYSTEM
Next Patent: IMAGE INFORMATION TRANSMISSION CONFIRMATION METHOD AND FACSIMILE SYSTEM