Photocopying – Projection printing and copying cameras – Illumination systems or details
Reexamination Certificate
2007-10-16
2007-10-16
Nguyen, Henry Hung (Department: 2851)
Photocopying
Projection printing and copying cameras
Illumination systems or details
C355S053000, C359S859000
Reexamination Certificate
active
11353005
ABSTRACT:
A projection optical system has at least eight reflecting mirrors and is relatively compact in the radial direction. The eight reflecting mirrors (M1˜M8) form a reduced image of a first surface on a second surface. A first reflecting image forming optical system (G1) forms a first intermediate image (IMI1) of the first surface based on light from the first surface, a second reflecting image forming optical system (G2) forms a second intermediate image (IMI2) of the first surface based on light from the first intermediate image, and a third reflecting image forming optical system (G3) forms a reduced image on the second surface based on light from the second intermediate image. The number of reflecting mirrors (M6˜M8) of the third reflecting image forming optical system is greater than the number of reflecting mirrors (M1, M2) of the first reflecting image forming optical system.
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Nguyen Henry Hung
Nikon Corporation
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