Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2006-01-17
2006-01-17
Nguyen, Thong (Department: 2872)
Optical: systems and elements
Diffraction
From grating
C359S569000, C359S566000
Reexamination Certificate
active
06987617
ABSTRACT:
A diffracting optical element has a structure that a plurality of layers having a periodic relief pattern varying in height in a period are laminated in proximity to or close contact with each other. The diffracting optical element includes two layers equal in the height of the relief pattern and opposite to each other in the direction in which the height of the relief pattern varies in a period, and another layer differing in the height of the relief pattern from the two layers. Materials forming the three layers differ in dispersion from one another.
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Canon Kabushiki Kaisha
Lavarias Arnel C.
Morgan & Finnegan , LLP
Nguyen Thong
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