Beam splitting diffractive optical element

Details Beam splitting diffractive optical element Beam splitting diffractive optical element

1997-07-09

2000-02-01

Henry, Jon

Optical: systems and elements

Diffraction

From grating

359570, 359569, G02B 518, G02B 2710, G02B 2744

Patent

active

060210001

ABSTRACT:
Disclosed is a diffractive optical element which includes a diffractive grating pattern on a base plate. The diffractive grating pattern includes a plurality of phase gratings arranged in parallel lines extending along a predetermined direction to cause diffraction of an incident beam. Each of the plurality of phase gratings has an asymmetrical phase pattern. There is a phase gap, .DELTA.P, representing a phase difference (in radians) between an end point and a beginning point of each phase pattern. The phase gap, .DELTA.P, is substantially equal for each of the plurality of phase gratings and satisfies the relationship

REFERENCES:
patent: 5561558 (1996-10-01), Shiono et al.
patent: 5574597 (1996-11-01), Kataoka
Ehbets et al., Interferometric Fabrication of Modulated Submicrometer Gratings in Photoresist, 34 Applied Optics, No. 14, pp. 2540-2547 (May 10, 1995).

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