Optical: systems and elements – Lens – Including a nonspherical surface
Reexamination Certificate
2006-05-02
2006-05-02
Schwartz, Jordan M. (Department: 2873)
Optical: systems and elements
Lens
Including a nonspherical surface
C359S641000
Reexamination Certificate
active
07038860
ABSTRACT:
The method of manufacturing an optical lens in accordance with the present invention includes a drawing optical lens preform preparing step of preparing a drawing optical lens preform comprising a first curved face part, formed aspheric in one side face thereof, functioning as an optically active part, and a second curved face part, formed in a side face opposite from the first curved face part, having a curvature smaller than that of the first curved face part; a drawing step of drawing the drawing optical lens preform to a desirable outer diameter; and an optical lens preparing step of preparing an optical lens1by slicing the drawn drawing optical lens preform. Since the second curved face part is formed, distortions can be restrained from occurring due to the drawing in this manufacturing method.
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English Translation of International Preliminary Examination Report for International Application No. PCT/JP02/04494.
Drinker Biddle & Reath LLP
Hamamatsu Photonics K.K.
Schwartz Jordan M.
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