Optical element

Details Optical element Optical element

1996-06-21

1998-06-09

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

Triangulation ranging to a point with one projected beam

359558, 396111, G01C 300

Patent

active

057643431

ABSTRACT:
An optical element which has a rear principal point located before a center of its thickness or a front focal point located after the center of its thickness and at least one surface which functions as a lens by utilizing the diffraction phenomenon.
Further, a focal point detecting optical system using a projector optical element or light emitting optical element which has a surface functioning as a lens by utilizing the diffraction phenomenon.

REFERENCES:
patent: 5239335 (1993-08-01), Kato
patent: 5296724 (1994-03-01), Ogata et al.
patent: 5629800 (1997-05-01), Hamblen
SPIE vol. 1354 International Lens Design Conference (1990), Michael W. Farn et al. pp. 24-29 (See Appln. p. 3.
SPIE vol. 1354 International Lens Design conference (1990). Carmina Londono et al. pp. 30-37 (See appln. p. 3.
Applied Optics/vol. 31 No. 13/1 May 1992, Ray Tracing Kinoform Lens Surfaces, William H. Southwell (See Appln. p. 3).
Applied Optics/vol. 31/1 May 1992, Modeling Diffraction Efficiency Effects When Designing Hydrid Diffractive Lenssystems, Carmina Londono et al, pp. 2248-2252.
SPIE vol. 126 clver Optics (1977) New Methods Of Designing Holographic Optical Elements, W.C. Sweatt.
Kogaku vol. 22 No. 3, Mar. 1993, Recent Advances in Holographic Optical Elements, Yuzo Ono pp. 126-130 (See appln. p. 3).

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