Diffractive optical element and optical instrument having the sa

Details Diffractive optical element and optical instrument having the sa Diffractive optical element and optical instrument having the sa

1997-12-23

1999-12-28

Henry, Jon

Optical: systems and elements

Diffraction

From grating

359569, 359574, 359575, 359613, G02B 518, G02B 2744

Patent

active

060089423

ABSTRACT:
A diffractive optical element for diffracting non-collimated light includes a base surface and a periodic structure formed on the base surface and having a plurality of diffractive surfaces and a plurality of boundary surfaces. The boundary surfaces are separated into plural zones, and in each zone, the boundary surface is placed substantially parallel to a main portion of a light beam impinging on that zone.

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patent: 5549994 (1996-08-01), Watanabe et al.
patent: 5754340 (1998-05-01), Ushida et al.
patent: 5754341 (1998-05-01), Takata et al.

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