Optical: systems and elements – Building interior illumination with reflected – refracted or...
Reexamination Certificate
2007-03-06
2010-11-30
Mahoney, Christopher E (Department: 2862)
Optical: systems and elements
Building interior illumination with reflected, refracted or...
C047S017000
Reexamination Certificate
active
07843639
ABSTRACT:
A plurality of structures each having a number of ridges and being formed in a long and thin plate shape or a long and thin film shape. The cross section of each of the ridges forms a portion of a substantial circle and a surface thereof is a practically specular surface. The ridges of each structure are parallel to each other and respective adjacent surfaces thereof correspond to each other in parallel and are spaced apart from each other at a predetermined distance. When light is incident on a point of a surface of one of the structures at an incident angle, in either its reflection or transmittance, the light is diffused in a circular conical plane whose vertex is the incident point and whose center axis is a line parallel to the ridges, by a diffraction effect caused by the arrayed ridges. The flux of reflected diffused light is spread in one lengthwise half of the circular conical plane and the flux of transmitted diffused light is spread in the other lengthwise half of the circular conical plane.
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Kabushiki Kaisha S.T.I. Japan
Mahoney Christopher E
Rhodes Leon W
Wenderoth , Lind & Ponack, L.L.P.
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