Optical: systems and elements – Diffraction – From grating
Patent
1998-09-29
2000-07-11
Spyrou, Cassandra
Optical: systems and elements
Diffraction
From grating
359819, G02B 702, G02B 518
Patent
active
060881607
ABSTRACT:
A diffractive optical element includes an optically functioning part including a diffraction grating and a flange part disposed around the optically functioning part. On an outer circumferential face of the flange part, there are at least three protrusions at respective different locations. The protrusions project outward from the outer circumferential face.
REFERENCES:
patent: 5024509 (1991-06-01), Kurihara
patent: 5608579 (1997-03-01), Nomura
Fukuda Masaaki
Ito Takashi
Nomura Yoshimitsu
Yagi Kaneyoshi
Fuji Photo Optical Co., Ltd.
Spyrou Cassandra
Winstedt Jennifer
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