Prism and optical device

Details Prism and optical device Prism and optical device

2011-07-12

2011-07-12

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Prism

With reflecting surface

Reexamination Certificate

active

07978426

ABSTRACT:
A prism (10) is in the form of a polygonal prism and has a first optical surface (11), a second optical surface (12) and a third optical surface (13) formed on different surfaces of the prism. A light entrance region (11a) is provided at the center of the first optical surface (11), a light exit region (12a) is provided at the center of the second optical surface (12) and a substantially flat light reflecting region (13a) is provided at the center of the third optical surface (13). Suppose that there is a virtual surface between the light reflecting region (13a) and the first optical surface (11), the virtual surface is positioned more inward in the prism than a peripheral region of the third optical surface (13) extending from the light reflecting region (13a) to an edge (14) between the third optical surface (13) and the first optical surface (11).

REFERENCES:
patent: 5946147 (1999-08-01), Tanaka et al.
patent: 2002/0001145 (2002-01-01), Tochigi
patent: 2002/0030901 (2002-03-01), Kobayashi et al.
patent: 2004-354869 (2004-12-01), None
patent: 2005-121928 (2005-05-01), None
patent: WO 2004/107010 (2004-12-01), None

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