Optical: systems and elements – Holographic system or element – Head up display
Reexamination Certificate
2006-07-24
2010-11-16
Allen, Stephone B (Department: 2872)
Optical: systems and elements
Holographic system or element
Head up display
C359S002000
Reexamination Certificate
active
07835050
ABSTRACT:
A hologram optical element is formed on a substrate so as to make an optical device. The hologram optical element is formed in an area smaller than an irradiation area of a beam for reproduction such as image light or object light on the substrate. Supposing that the beam for reproduction is made of a center beam having intensity higher than 50% of center intensity and other peripheral beam, the hologram optical element is formed on the substrate in a size for diffracting only the center beam so that a flare or a ghost can be relieved without using additional optical elements such as a shading plate.
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Kasai Ichiro
Noda Tetsuya
Shimizu Yoshie
Tanijiri Yasushi
Allen Stephone B
Doak Jennifer L.
Konica Minolta Photo Imaging Inc.
Sidley Austin LLP
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