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Focusing anomalies with binary diffractive optical elements
Applied Optics, 2017Binary diffractive optics have been extensively studied to date as tools for arbitrary laser beam shaping and experimentally implemented with etched transparent optics and spatial light modulators. Here we demonstrate that a simple one-step binary optic is able to enhance the intensity of a focused beam, displaying some counterintuitive focusing ...
O, Bouzid +6 more
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Testing Diffractive Optical Elements
2009Once a surface relief pattern has been patterned in photoresist or etched into a substrate, how do you know if you have produced what you wanted? There are many different approaches to answering this question, but all of them fall into one of two categories: (1) metrological tests that measure the dimensions and geometry of the surface structures or (2)
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Thermal Distortion of Diffraction-Limited Optical Elements
Applied Optics, 1966Recent developments of laser materials have advanced the state of the art to a point where the optical quality of many of these materials is approaching the diffraction limit. Using such components in a laser does not necessarily guarantee the generation of diffraction-limited laser beams.
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Making a Diffractive Optical Element
2009In previous chapters we considered the fundamental theories of diffraction and a number of design approaches for diffractive optical elements. However, before a diffractive optical element can be built, a number of additional questions must be addressed. For example: - How is the design in a computer "transformed" into a physical component?
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Multifocus optical pickup with diffractive optical elements
SPIE Proceedings, 1999A 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, 1988An 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, 2001The 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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Measurement of Diffraction Efficiency for Diffractive Optical Elements
Acta Optica Sinica, 2012杨亮亮 Yang Liangliang +3 more
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Broad‐Bandwidth Micro‐Diffractive Optical Elements
Laser and Photonics Reviews, 2022Zhi-Yong Hu +2 more
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