Optics: image projectors – Composite projected image
Reexamination Certificate
2006-10-03
2006-10-03
Koval, Melissa Jan (Department: 2851)
Optics: image projectors
Composite projected image
C353S020000, C353S031000, C353S069000, C353S102000
Reexamination Certificate
active
07114812
ABSTRACT:
An illumination optical system which can use light from a light source with high efficiency and can provide an illumination luminous flux with highly uniform illuminance, is disclosed. The illumination optical system illuminates an illumination surface with a generally telecentric illumination luminous flux. In light intensity distribution of illumination light on the illumination surface changing depending on a deviation angle of an incident ray with respect to a normal to the illumination surface, the illumination optical system operates the illumination luminous flux such that a ratio of angle widths at which light intensity reaches half of a peak value in each of two axis directions orthogonal to each other on the illumination surface is an aspect ratio of 2:1.
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Chinese Office Action Jul. 11, 2005 w/English Translation of Examiner's Comments in Chinese Office Action.
Canon Kabushiki Kaisha
Koval Melissa Jan
Morgan & Finnegan , LLP
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