Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Reexamination Certificate
2006-01-20
2008-11-04
Mack, Ricky L (Department: 2873)
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
C359S630000, C359S633000
Reexamination Certificate
active
07446943
ABSTRACT:
A display optical system for guiding light from an original picture to an eye of an observer or a surface to have an image projected thereon is provided with a first optical system and a second optical system. The first optical system is provided with a first surface that is formed on a transparent body and has at least a reflecting action, a second surface for reflecting light reflected on the first surface toward the first surface again, and a third surface that is formed on the transparent body in the same manner as the first surface and transmits the light from the original picture. The light transmitted through the third surface travels toward the first surface and reflected for the first time on the first surface. In addition, a principal ray at central angle of view to be reflected for the last time on the first surface is reflected and travels to a side opposite to a side of the first reflection on the first surface with respect to a normal line of a surface on a hit point thereof. With such a structure, a small display optical system that is capable of widening an angle of view is realized.
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Translation of Gist of the reference 2 (Partial English Translation of Japanese Office Action of JP Appln. No. 2001-349351).
Inoguchi Kazutaka
Matsunaga Motomi
Morishima Hideki
Takagi Akinari
Yamazaki Shoichi
Canon Kabushiki Kaisha
Mack Ricky L
Morgan & Finnegan , LLP
Tra Tuyen Q
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