Optical: systems and elements – Lens – With reflecting element
Reexamination Certificate
2006-03-21
2006-03-21
Sugarman, Scott J. (Department: 2873)
Optical: systems and elements
Lens
With reflecting element
C359S727000, C359S731000
Reexamination Certificate
active
07016124
ABSTRACT:
An image-formation optical system is disclosed which is an off-axial optical system configured using reflective surfaces, with which the performance deterioration with respect to manufacturing discrepancies is reduced, and which can be made sufficiently compact. The image-formation optical system comprises a reflective optical unit including a plurality of reflective surfaces. Each of the reflective surfaces has a curvature and a rotationally asymmetric shape. Moreover, L/{Er(S−1)} is smaller than 2.2 and L/{Eo (S−1)} is larger than 3.
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Communication from European Patent Office dated Aug. 5, 2004 for Appl. No. 04253323.2-2217-.
Hatakeyama Koshi
Sunaga Toshihiro
Morgan & Finnegan L.L.P.
Sugarman Scott J.
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