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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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Multi-functional diffractive optical elements
SPIE Proceedings, 2014Diffractive optics has traditionally been used to transform a parallel beam of light into a pattern with a desired phase and intensity distribution. One of the advantages of using diffractive optics is the fact that multiple functions can be integrated into one element.
A. Vijayakumar, Shanti Bhattacharya
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Diffractive optical elements in glass
2003Diffractive optical elements (DOE) in glass are achieved by the means of the thermal ion exchange in a substrate glass. We report about the technical advantages and limitations for the design of DOEs in respect of this new technology. Α first application has been worked out for a Nd:YAG laser cutting Station.
Thoma, C. +3 more
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Optical sectioning microscopy using diffractive optical elements
Digital Holography and 3-D Imaging 2022, 2022Metasurfaces have demonstrated their ability to replace large refractive optical elements. In this talk, I will discuss in the detail recent applications of metalens in two optical sectioning microscopy modalities.
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Design of Diffractive Optical Elements
2017Diffractive optical elements tailor optical fields via diffraction. The diffraction patterns of standard apertures such as single slit, double slit, circular aperture, and square slit are well known. However, for applications, apertures with higher levels of complexity may be required. A DOE can be thought of as a special aperture and can be engineered
A. Vijayakumar, Shanti Bhattacharya
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Optical Vortex Diffractive Optical Element- Scattering Application
Diffractive Optics and Micro-Optics, 2002An optical vortex diffractive element was constructed by etching a plate of glass in a spiral staircase shape, such that the thickness of the glass increased in the azimuthal direction of the glass plate. The phase mask was then used to detect the light forward scattered through a colloidal solution.
David Palacios, Grover A. Swartzlander
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Diffractive optical element for optical data storage
SPIE Proceedings, 2013The diffractive optical element (DOE) has the transformation function of wavefront, and its applications are forming or homogenization of beam, and aberration correction, and so on. In this study, we evaluate possibility as storage application of the DOE. The optical data storage using the DOE is thought of as a kind of holographic data storage (HDS)
S. Yoshida +5 more
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Tunable protein harmonic diffractive micro-optical elements
Optics Letters, 2012Herein, tunable protein harmonic diffractive microlenses (PHDMs) have been constructed by femtosecond laser direct writing from bovine serum albumin. With excellent three-dimensional topography, PHDMs show distinct harmonic diffractive features, such as similarly good imaging performance with smaller thickness than refractive lenses and well controlled
Yun-Lu, Sun +4 more
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Programmable multilayer diffractive optical elements
Journal of the Optical Society of America A, 1997Although the technology of fixed optical interconnects has shown rapid progress, the programmability requirements remain a difficulty that has not yet been definitively solved. A new configuration of diffractive optical elements is presented that takes full advantage of the progress made in the field of fixed elements and also offers the possibility of
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Crossed phase gratings with diffractive optical elements
Applied Optics, 1998Orienting two identical or complementary diffractive gratings with a small angle between the grating grooves allows a new crossed-grating device to be constructed. This device has an effective profile that varies locally. For understanding the effects of this variation and the diffraction efficiency of the gratings, the local profiles were correlated ...
W S, Rockward, D C, O'Shea
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