Optical element, and optical system and optical apparatus using same

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United States of America Patent

PATENT NO 9423530
APP PUB NO 20150369967A1
SERIAL NO

14842148

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Abstract

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The optical element of the present invention has an anti-reflection film formed on a substrate. Here, the anti-reflection film comprises a first layer formed on the substrate; a second layer formed on the first layer and consisting of a material different from that of the first layer; and a third layer formed on the second layer and consisting of a concave-convex structure. Also, the third layer has three regions of which a refractive index for each thickness changes at a constant rate by continuously changing the space filling factor of the concave-convex structure.

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Patent Owner(s)

Patent OwnerAddress
CANON KABUSHIKI KAISHATOKYO 146-8501

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishimatsu, Rie Utsunomiya, JP 16 60
Okuno, Takeharu Utsunomiya, JP 21 188

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