Projection lens unit having reflection mirror in projection...

Details Projection lens unit having reflection mirror in projection... Projection lens unit having reflection mirror in projection...

2008-02-20

2009-11-17

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C359S733000, C359S811000

Reexamination Certificate

active

07619828

ABSTRACT:
A frame18with a first lens group15and a second lens group17of a projection lens system fixedly mounted thereto is supported by a support arm43so as to direct a mirror mounting aperture27of the frame18downward. The reflection mirror16for folding an optical axis of the projection lens system is held and placed within the mirror mounting aperture27of the frame18by a mirror support46so as thereby to provisionally complete the projection lens system. Then, while an image of a test pattern generated by a test pattern projection head44is projected onto a remote screen47by the provisionally complete the projection lens system, the reflection mirror16is adjusted in position by45by a mirror position adjusting unit45. When the test pattern image on the screen is correctly projected, a bonding adhesive is filled in a circumferential clearance left between the reflection mirror16and the mirror mounting aperture27and cured by use of an ultraviolet lamp49to bond and fix the reflection mirror16to the frame18.

REFERENCES:
patent: 3709582 (1973-01-01), Walker
patent: 5774271 (1998-06-01), Lagerway et al.
patent: 7242530 (2007-07-01), Yeo
patent: 7443617 (2008-10-01), Tsai
patent: 2007/0268593 (2007-11-01), Kang et al.
patent: 2005-352293 (2005-12-01), None

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