Optical: systems and elements – Projection screen – With reflector or additional screen
Reexamination Certificate
2006-05-24
2009-10-13
Mahoney, Christopher (Department: 2862)
Optical: systems and elements
Projection screen
With reflector or additional screen
C359S459000, C359S461000
Reexamination Certificate
active
07602549
ABSTRACT:
A screen having two optical characteristics is realized in a compact structure. As a result, a structure is provided where two types of screen surface having different optical characteristics are formed on the same side of the same sheet, and wound in a single storage tube, and it is possible to pull out and fix the first screen from the storage tube in a state where the second screen is stored in the storage tube.
REFERENCES:
patent: 5353152 (1994-10-01), Realmuto
patent: 6297905 (2001-10-01), Takamoto et al.
patent: 6424463 (2002-07-01), Nishitani
patent: 7042640 (2006-05-01), Devos et al.
Adams & Wilks
Mahoney Christopher
Yamauchi Naofumi
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