Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2006-05-16
2006-05-16
Chang, Audrey (Department: 2872)
Optical: systems and elements
Diffraction
From grating
C524S497000
Reexamination Certificate
active
07046445
ABSTRACT:
To provide an optical element in which the diffraction efficiency in each use wavelength region within the entire visible region is preferable, and light beams of a specific order (design order) are sufficiently concentrated in the entire use wavelength region, by using an optical material in which the relationship between a refraction index ndand an Abbe number νdwith respect to a “d” line is nd>−6.667×10−3νd+1.70 and the Abbe number νdsatisfies νd≦16.
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Canon Kabushiki Kaisha
Chang Audrey
Fitzpatrick ,Cella, Harper & Scinto
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