Optical: systems and elements – Diffraction – From grating
Patent
1990-09-27
1992-05-12
Arnold, Bruce Y.
Optical: systems and elements
Diffraction
From grating
359571, 359575, G02B 518, G02B 2744
Patent
active
051132869
ABSTRACT:
A phase diffraction grating apparatus which is usable to generate an array of N spots, where n is an even integer, and the N spots are substantially equally spaced. The generation of an even number of spots is achieved using a translation symmetry in the grating design. Illustratively, the intensities of the N spots are substantially equal. Binary, multi-level, and continuous phase grating embodiments are disclosed. In the case of the multi-level and continuous embodiments, the uniform intensity is obtained using a reflection symmetry in the grating design.
REFERENCES:
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patent: 4846552 (1989-07-01), Veldkamp et al.
patent: 4895790 (1990-01-01), Swanson et al.
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S. J. Walker et al., "Array Generation with Multilevel Phase Gratings", Optical Society of America, Aug. 1990, vol. 7, No. 8, pp. 1509-1513.
R. L. Morrison et al., "Binary Phase Gratings Generating Even Numbered Spot Arrays", Optical Society of America, 1989 Annual Meeting, Oct. 15-20, 1989, p. 111.
Arnold Bruce Y.
AT&T Bell Laboratories
Lerner Martin
Watland Ross T.
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