Diffractive optical element and method of designing the same

Details Diffractive optical element and method of designing the same Diffractive optical element and method of designing the same

2008-05-15

2010-10-26

Edun, Muhammad N. (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112230, C369S044230

Reexamination Certificate

active

07821900

ABSTRACT:
A transmissive or reflective diffractive optical element, comprising: a substrate having a top surface, the top surface being etched into a pattern, the pattern including a periodic surface pattern of grooves formed such that when an incoming light beam is shone onto the top surface, the incoming light beam will be split into a plurality of diffracted light beams, the plurality of diffracted light beams including a plurality of primary diffracted order beams and a plurality of secondary diffracted order beams, wherein the primary diffracted order beams have a primary aggregate efficiency above ninety percent, wherein the plurality of secondary diffracted order beams have a secondary aggregate efficiency of lower than ten percent, and wherein a maximum power of the primary diffracted order beams and a minimum power of the primary diffracted order beams differ by at least ten percent of an average power of the primary diffracted order beams.

REFERENCES:
patent: 4545646 (1985-10-01), Chern et al.
patent: 6400509 (2002-06-01), Sappey et al.
patent: 6529321 (2003-03-01), Pan et al.
patent: 6650477 (2003-11-01), Nakai
patent: 6775066 (2004-08-01), Kurisu et al.
patent: 6788465 (2004-09-01), Kleemann et al.
patent: 7002747 (2006-02-01), Augustyn et al.
patent: 7054065 (2006-05-01), Wolfe et al.
patent: 7095560 (2006-08-01), Toyoda et al.
patent: 7142363 (2006-11-01), Sato et al.
patent: 7187499 (2007-03-01), Kleemann et al.
patent: 7649825 (2010-01-01), Tsuchida et al.
patent: 7704684 (2010-04-01), Rogers et al.
patent: 2004/0169929 (2004-09-01), Sato et al.
patent: 2005/0078374 (2005-04-01), Taira et al.
patent: 2005/0190811 (2005-09-01), Gruhlke
patent: 2005/0226122 (2005-10-01), Ooi et al.
patent: 2007/0201795 (2007-08-01), Rice et al.
patent: 2007/0223326 (2007-09-01), Yamamoto et al.
patent: 2007/0229939 (2007-10-01), Brown et al.
Press, William et al, “Minimization or Maximization of Functions.” in:Numerical Recipes in C: The Art of Scientific Computing, Second Edition(New York, Cambridge University Press, 1992), Chapter 10, pp. 394-455.
Mait, Joseph N., “Design of binary-phase and multiphase Fourier gratings for array generation,” J. Opt. Soc. Am. A, vol. 7, No. 8, Aug. 1990, pp. 1514-1528.
Leger, James R. et al., “Coherent laser addition using binary phase gratings,” Applied Optics, vol. 26, No. 20, Oct. 15, 1987, pp. 4391-4399.
Prongue, D. et al., “Optimized kinoform structures for highly efficient fan-out elements,” Applied Optics, vol. 31, No. 26, Sep. 10, 1992, pp. 5706-5711.
Hergenhan, Guido et al., “Coherent coupling of vertical-cavity surface-emitting laser arrays and efficient beam combining by diffractive optical elements: concept and experimental verification,” Applied Optics, vol. 42, No. 9, Mar. 20, 2003, pp. 1667-1680.
Dammann H. et al., “High-Efficiency In-Line Multiple Imaging by Means of Multiple Phase Holograms,” Optics Communications, vol. 3, No. 5, Jul. 1971, pp. 312-315.
Gerchberg, R.W. et al., “A Practical Algorithm for the Determination of Phase from Image and Diffraction Plane Pictures,” Optik, vol. 35, No. 2, 1972, pp. 237-250.
Fan, T.Y. et al., “Coherent (phased array) and wavelength (spectral) beam combining compared,” Fiber Lasers II: Technology, Systems and Applications, Proceedings of SPIE vol. 5709 (SPIE, Bellingham, WA, 2005), pp. 157-164.

Affiliated with

Also associated with

Rating

Diffractive optical element and method of designing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Diffractive optical element and method of designing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffractive optical element and method of designing the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4227136