Interferometric arrangement with diffractive optical element for

Details Interferometric arrangement with diffractive optical element for Interferometric arrangement with diffractive optical element for

1995-12-26

1997-09-30

Dang, Hung X.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, 351221, A61B 310

Patent

active

056730969

ABSTRACT:
An arrangement for measuring intraocular distances between different optical boundary surfaces of the human eye by at least one interferometric measurement system is provided. The arrangement further comprises at least one diffractive optical element (DOE) for dividing the illumination beam path into partial beam paths for different boundary surfaces and/or for combination and mutual adaptation of the wavefronts of measurement light components proceeding from different boundary surfaces and/or for adaptation of the wavefronts of measurement light components proceeding from different boundary surfaces of the eye to the wavefront of the measurement light of at least one interferometric reference arm.

REFERENCES:
patent: 5349399 (1994-09-01), Sekine
"ABC der Optik", Leipzig 1961, pp. 96-99.
"Laser Beam Lithographed Micro-Fresnel Lenses," Applied Optics, vol. 29, No. 34, 1 Dec. 1990, pp. 5120 to 5126.
"Fabrication of Holographic Microlenses Using a Deep UV Lithographed Zone Plate," Applied Optics, vol. 29, No. 34, 1 Dec. 1990, pp. 5111 to 5114.
"Wavelength Independent Grating System," Applied Optics, vol. 28, No. 4, 15 Feb. 1989, pp. 682 to 686.

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