Results 231 to 240 of about 2,528 (265)

Multifocus optical pickup with diffractive optical elements

SPIE Proceedings, 1999
A novel optical pickup based on DOEs is proposed and first optical key elements are designed and fabricated. The DOE- pickup enables multi-focus imaging and speeds up the data transfer rate. Parallel reading of many tracks and two or more superimposed memory layers is possible.
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Diffractive optical element for an optical servo system

Annual Meeting Optical Society of America, 1988
An embossed diffractive optical element (DOE) is used as an efficient planar inexpensive collimator for a point source light-emitting diode. The DOE, with a 1-mm diameter and 2.1-mm focal length, is installed in a 2.5-mm square read/write head on-axis with an 890-nm LED. This collimated beam emits through a magnetic-coated floppy disk, which includes a
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Diffractive optical elements as raster-image generators

Applied Optics, 2001
The use of diffractive optical elements (DOEs) to generate complex raster images for a primarily artistic purpose is dealt with. Aspects of human vision that are relevant for the design of such elements are discussed. A design method based on an iterative Fourier transform algorithm and extended with elements from the direct-binary-search and the ...
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Diffractive optical elements

2018
Russell A. Chipman, Wai-Sze Tiffany Lam, Garam Young   +2 more
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Measurement of Diffraction Efficiency for Diffractive Optical Elements

Acta Optica Sinica, 2012
杨亮亮 Yang Liangliang, 崔庆丰 Cui Qingfeng, 刘涛 Liu Tao, 薛常喜 Xue Changxi   +3 more
openaire   +1 more source

Research on development of aspheric diffractive optical element for mid-infrared imaging

Infrared Physics and Technology, 2023
Neha Khatri, K Manjunath, Saurav Goel
exaly  

Diffractive Elements in Optical Fibers

2021
Juan Hernández-Cordero, Mathieu Hautefeuille   +1 more
openaire   +1 more source

Diffractive optical element, confocal microscope and method for designing a diffractive optical element

The invention relates to a diffractive optical element (1) for generating from an input light beam (65) a plurality of smaller light spots (66) on a target surface (21), comprising a material layer (10) having a plurality of at least first and second subareas (11, 12, 13) having any of first and second absorption coefficients or first and second ...
openaire  

Design of a diffractive optical element for wide spectral bandwidth

Optics Letters, 1998
Yoel Arieli
exaly  

Three-dimensional laser trapping on the base of binary radial diffractive optical element

Journal of Modern Optics, 2015
Svetlana N Khonina, Alexey P Porfirev, Vladimir Pavelyev   +2 more
exaly