Optical: systems and elements – Single channel simultaneously to or from plural channels – By surface composed of lenticular elements
Patent
1999-03-11
2000-10-10
Mack, Ricky
Optical: systems and elements
Single channel simultaneously to or from plural channels
By surface composed of lenticular elements
359574, 359570, 359569, G02B 2710, G02B 518
Patent
active
061307823
ABSTRACT:
A beam splitting element includes a transparent substrate and a diffractive grating formed on the substrate for dividing an incident beam into a plurality of diffracted beams. The diffractive grating has a plurality of identically formed belt-shaped phase patterns that are arranged in parallel lines at equal pitches. The phase pattern has a sectional shape in a plane perpendicular to the parallel lines that causes non-linear phase difference to the beam passing therethrough within one pitch. Further, the adjacent phase patterns are connected without phase gaps at the boundaries therebetween.
REFERENCES:
patent: 5574597 (1996-11-01), Kataoka
patent: 6021000 (2000-02-01), Iizuka et al.
Optical Engineering, vol. 34 No. 12,;"Continuous-Relief Fan-Out Elements With Optimized Fabrication Tolerances," pp. 3456-3464; published in Dec., 1995.
Applied Optics, vol. 34, No. 14; "Interferometric Fabrication Of Modulated Submicrometer Gratings In Photoresist;" pp. 2540-2547; published in May 1995.
Iizuka Takashi
Noguchi Masato
Asahi Kogaku Kogyo Kabushiki Kaisha
Mack Ricky
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