Diffractive optical element that polarizes light and an...

Details Diffractive optical element that polarizes light and an... Diffractive optical element that polarizes light and an...

2005-09-20

2005-09-20

Dunn, Drew A. (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S569000, C359S571000, C359S572000, C359S576000, C385S037000

Reexamination Certificate

active

06947213

ABSTRACT:
A first diffractive optical element pattern with a pattern pitch that is no greater than a wavelength of incident light is formed on a first main surface of substrate such as a glass plate. Second diffractive optical element patterns are formed at positions that are respectively incident to positive first-order diffracted light and negative first-order diffracted light produced by the first diffractive optical element pattern. Negative first-order diffracted light produced by each second diffractive optical element pattern is incident upon a boundary face of the substrate at an angle that is smaller than the critical angle, and so exits the substrate.

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