Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2006-11-21
2006-11-21
Amari, Alessandro (Department: 2872)
Optical: systems and elements
Diffraction
From grating
C359S576000
Reexamination Certificate
active
07139128
ABSTRACT:
A reflective diffraction grating having grooves and ridges and providing high throughput efficiency in the minus-first diffraction order. All but the zeroth diffraction order and the minus-first diffraction order may be prevented from existence by directing the radiation onto the grating at an appropriate angle. The radiation having a TM polarization is eliminated from the zeroth order by destructive interference by appropriate selection of a the groove width of the grating, and radiation having a TE polarization is eliminated from the zeroth order by destructive interference by depositing an overcoat of an appropriate thickness. A dielectric material may be deposited in the grooves.
REFERENCES:
patent: 4281894 (1981-08-01), Guha
patent: 4846552 (1989-07-01), Veldkamp et al.
patent: 5448398 (1995-09-01), Asakura et al.
patent: 5907436 (1999-05-01), Perry et al.
patent: 5925878 (1999-07-01), Challener
patent: 5995285 (1999-11-01), Unno
patent: 5999318 (1999-12-01), Morton et al.
patent: 6157488 (2000-12-01), Ishii
patent: 6162495 (2000-12-01), Morton
patent: 6191890 (2001-02-01), Baets et al.
patent: 6219478 (2001-04-01), Parriaux et al.
patent: 6529321 (2003-03-01), Pan et al.
patent: 92640 (1975-01-01), None
Moharam M G et al., “Rigorous Coupled-Wave Analysis of Metallic Surface-Relief Gratings”, Journal of The Optical Society of America-A, Optical Society of America, Washington, US, vol. 3, No. 11, Nov. 1, 1986, pp. 1780-1787, XP000616808, ISSN.
Roumiguieres J L et al., “On the Efficiencies of Rectangular-Groove Gratings”, Journal of the Optical Society of America, American Institute of Physics. New York, US, vol. 66, No. 8, Aug. 1976, pp. 772-775, XP002963365.
Payne Richard S.
Smith Malcolm C.
Amari Alessandro
Lowrie Lando & Anastasi, LLP
Polychromix Corporation
LandOfFree
Diffraction grating having high throughput efficiency does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diffraction grating having high throughput efficiency, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffraction grating having high throughput efficiency will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3668706