Displaying optical system and image projection apparatus

Details Displaying optical system and image projection apparatus Displaying optical system and image projection apparatus

2005-08-15

2009-08-11

Blackman, Rochelle-Ann J (Department: 2862)

Optics: image projectors

Particular condenser

C353S098000, C348S195000, C359S212100, C359S223100

Reexamination Certificate

active

07572015

ABSTRACT:
A displaying optical system is disclosed, which is capable of reducing a speckle noise. The displaying optical system comprises a light source emitting coherent light, a scanning device scanning the light, a first optical system causing the light from the scanning device to form an intermediate image, a second optical system causing the light from the intermediate image to form an image on a real display surface, and an optical element arranged between the first and second optical systems. The optical element widens the divergence angle of the light emerged from the optical element toward the second optical system more than the incident angle of the light on the optical element from the first optical system.

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Full English Translation of JP 11-101925, Published Apr. 13, 1999.
Full English Translation of JP 10301057, Published Nov. 13, 1998.

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