Diffractive optical element and an optical system having a diffractive optical element
This application is based on applications Nos. H10-73975, H10-73980, and H10-77378 filed in Japan, the content of which is hereby incorporated by reference. A diffractive optical element for white light is composed of a plurality of layers of optical materials and has a relief pattern constituting a...
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| Format | Patent |
| Language | English |
| Published |
21.05.2002
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| Online Access | Get full text |
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| Summary: | This application is based on applications Nos. H10-73975, H10-73980, and H10-77378 filed in Japan, the content of which is hereby incorporated by reference.
A diffractive optical element for white light is composed of a plurality of layers of optical materials and has a relief pattern constituting a diffraction grating formed at least at one cementing interface between the two different optical materials. The grating height of the relief pattern constituting the diffraction grating is defined by h= /n−n′|, where h represents the grating height of the relief pattern constituting the diffraction grating; represents the design wavelength, which is less than or equal to 450 nm; n represents the refractive index of the optical material abutting the interface from the object side for light of the wavelength ; and n′ represents the refractive index of the optical material abutting the interface from the image side for light of the wavelength . |
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