Photocopying – Projection printing and copying cameras – Illumination systems or details
Reexamination Certificate
2006-02-07
2006-02-07
Nguyen, Henry Hung (Department: 2851)
Photocopying
Projection printing and copying cameras
Illumination systems or details
C355S053000, C359S861000
Reexamination Certificate
active
06995833
ABSTRACT:
A projection optical system for projecting an image of a first object onto a second object includes a first imaging optical system that forms a first intermediate image of the first object, and includes a lens, a second imaging optical system that forms a second intermediate image of the first object, and includes a lens and a concave mirror, and a third imaging optical system that forms an image of the first object onto the second object, and includes a lens, wherein the first, second and third imaging optical systems are arranged along an optical path from the first object in this order, and 0.7<|β1·β2|<3.0 is met where β1is a paraxial magnification of the first imaging optical system, and β2is a paraxial magnification of the second imaging optical system.
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Kato Takashi
Terasawa Chiaki
Canon Kabushiki Kaisha
Morgan & Finnegan , LLP
Nguyen Henry Hung
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