Optical: systems and elements – Diffraction – From zone plate
Patent
1997-10-23
2000-08-08
Spyrou, Cassandra
Optical: systems and elements
Diffraction
From zone plate
359558, 359570, 359785, G02B 2744, G02B 914
Patent
active
061010359
ABSTRACT:
A triplet lens system composed of a first positive lens element, a second negative lens element and a third positive lens element. At least one lens surface is provided with a blazed zonal structure having a function of a positive diffractive lens.
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Asahi Kogaku Kogyo Kabushiki Kaisha
Jr. John Juba
Spyrou Cassandra
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