Optical: systems and elements – Lens – With field curvature shaping
Reexamination Certificate
2005-01-18
2005-01-18
Dang, Hung X. (Department: 2873)
Optical: systems and elements
Lens
With field curvature shaping
C359S651000, C349S005000
Reexamination Certificate
active
06844982
ABSTRACT:
A projection optical system includes a plurality of light-transmissive members and projects an image of a first surface onto a second surface. The projection optical system includes a light-transmissive crystal member made of crystal material. At least one of the light-transmissive crystal members satisfiesin-line-formulae description="In-line Formulae" end="lead"?0.3<ED/LD<0.95in-line-formulae description="In-line Formulae" end="tail"?Where an clear aperture diameter of the light-transmissive crystal member is denoted by ED and an outside diameter of the light-transmissive crystal member is denoted by LD.
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