Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Masahiro Terada0
Date of Patent
February 20, 2018
0Patent Application Number
155368910
Date Filed
April 7, 2015
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An optical unit includes a digital micromirror device in which each of micro-mirrors is driven biaxially in ON/OFF control, a first prism directs illumination light to the digital micromirror device, a second prism including an OFF-light reflecting surface reflects OFF light reflected from the micro-mirrors in an OFF state and transmits ON light reflected from the micro-mirrors in an ON state, and a third prism emits the ON light incident from the second prism toward a projection side. The micro-mirrors reflect the OFF light so that an optical axis of the OFF light is directed away from a projection-optical-axis plane including an optical axis of the ON light and an optical axis of the illumination light.
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