Diffraction optical system using free curve surface prism, and image capturing device

Diffraction optical system using free curve surface prism, and image capturing device

A diffraction optical system comprises a free curve surface prism (14), and a multilayer diffractive optical element in which a plurality of diffractive element members (121, 122) are laminated together and a diffractive optical surface (DM) having a grating structure is formed at the interface ther...

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description A diffraction optical system comprises a free curve surface prism (14), and a multilayer diffractive optical element in which a plurality of diffractive element members (121, 122) are laminated together and a diffractive optical surface (DM) having a grating structure is formed at the interface thereof. The diffraction optical system further satisfies the following conditional expression: 0.005
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The diffraction optical system further satisfies the following conditional expression: 0.005&lt;(ΔNg+ΔNs)/2&lt;0.45, where ΔNg denotes a refractive index difference at g-line on the diffractive optical surface (DM), and ΔNs denotes a refractive index difference at s-line on the diffractive optical surface (DM).</abstract><oa>free_for_read</oa></addata></record>
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OPTICS
PHYSICS
title Diffraction optical system using free curve surface prism, and image capturing device
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