Active optical zoom system

Details Active optical zoom system Active optical zoom system

2005-12-20

2005-12-20

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

Reexamination Certificate

active

06977777

ABSTRACT:
An active optical zoom system changes the magnification (or effective focal length) of an optical imaging system by utilizing two or more active optics in a conventional optical system. The system can create relatively large changes in system magnification with very small changes in the focal lengths of individual active elements by leveraging the optical power of the conventional optical elements (e.g., passive lenses and mirrors) surrounding the active optics. The active optics serve primarily as variable focal-length lenses or mirrors, although adding other aberrations enables increased utility. The active optics can either be LC SLMs, used in a transmissive optical zoom system, or DMs, used in a reflective optical zoom system. By appropriately designing the optical system, the variable focal-length lenses or mirrors can provide the flexibility necessary to change the overall system focal length (i.e., effective focal length), and therefore magnification, that is normally accomplished with mechanical motion in conventional zoom lenses. The active optics can provide additional flexibility by allowing magnification to occur anywhere within the FOV of the system, not just on-axis as in a conventional system.

REFERENCES:
patent: 4836661 (1989-06-01), Ikemori
patent: 6369954 (2002-04-01), Berge et al.
patent: 6421185 (2002-07-01), Wick et al.
patent: 6473241 (2002-10-01), Wick et al.
patent: 6538823 (2003-03-01), Kroupenkine et al.
patent: 6778328 (2004-08-01), Aizenberg et al.
patent: 6870689 (2005-03-01), Yoshida
D.V. Wick, et al., “Foveated imaging demonstration,” Optics Express 10, 60-65 (2002).
T. Martinez, et. al., “Foveated, wide field-of-view imaging system using a liquid crystal spatial light modulator,” Optics Express 8, 555-560 (2001).
E. C. Tam, “Smart electro-optical zoom lens,” Optics Letters 17(5), 369 (1992).
A. F. Naumov, et al., “Control optimization of spherical modal liquid crystal lenses,” Opt. Express 4(9), 344 (1999).
V. Laude, “Twisted-nematic liquid-crystal pixilated active lens,” Opt. Comm. 153(1-3), 134 (1998).
Y. Takaki, et al., “Liquid-crystal active lens: A reconfigurable lens employing a phase modulator,” Opt. Comm. 126(1-3), 123 (1996).
Acton, “Correction of static optical errors in a segmented adaptive optical system,” Appl. Opt. 34(34), 7965 (1995).
| “Xinetics Inc: Deformable Mirrors,” [retrieved on Apr. 8, 2004]. Retrieved from the Internet:<URL:http://www.xinetics.com>.
“Boston Micromachines Corporation,” [retrieved on Apr. 8, 2004]. Retrieved from the Internet:<URL:http://www.bostonmicromachines.com>.
“Flexible Optical B.V.,” [retrieved on Apr. 8, 2004]. Retrieved from the Internet:<URL:http://www.okotech.com>.
G. D. Love, “Wave-front correction and production of Zernike modes with a liquid-crystal spatial light modulation,” Appl. Opt. 36(7), 1517 (1997).
D. V. Wick, et al., “Adaptive optical zoom” Opt. Eng. 43(1) 8 (2004).
T. Martinez, et al., “Non-mechanical zoom system,” Proc. SPIE vol. 5234, p 375 (2004).
| “Varioptic Products Zooms” [retrieved on Mar. 31, 2004]. Retrieved from the Internet:<URL:http://www.varioptic.com>.
Benno Hendriks, “Through a Lens Sharply” IEEE Spectrum NA, Dec. 2004, 32-36.
S. Kuiper, “Variable-focus liquid lens for miniature cameras,” Applied Physics Letters, vol. 85, No. 7, Aug. 16, 2004, 1128-1130.
T. Krupenkin, “Tunable Liquid microlens,” Applied Physics Letters, vol. 82, No. 3, Jan. 20, 2003, 316-318.
International Publication No.: WO 2004/038480 A1, May 6, 2004, PCT, Kuiper, S.

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