Optical: systems and elements – Diffraction – From zone plate
Patent
1995-10-31
1998-04-07
Henry, Jon W.
Optical: systems and elements
Diffraction
From zone plate
359566, 359575, 359570, 359885, G02B 518, G02B 522, G02B 1314
Patent
active
057371253
ABSTRACT:
An optical system for use in a relatively wide wavelength range including a plurality of diffractive optical elements whose diffraction efficiencies are optimized for different wavelengths within said predetermined wavelength range. A diffractive optical element for use in a wide wavelength range includes a light transmissive substrate having a plurality of surface regions and a plurality of surface relief diffractive gratings are formed in said surface regions such that diffraction efficiencies of these gratings are optimized for different wavelengths within said predetermined wavelength range. A diffractive optical element is formed by a single optical element having a light transmissive substrate which reveals a given spectral transmittance and a surface relief diffractive grating formed in a surface of said substrate such that a wavelength dependency of said grating provides a desired spectral transmittance together with said spectral transmittance of the substrate.
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Henry Jon W.
Olympus Optical Co,. Ltd.
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