Results 121 to 130 of about 2,348 (165)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +2 more sources
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
openaire +1 more source
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
openaire +2 more sources
Micro- and Diffractive Optical Elements
2018With the rapid development of modern optics and optoelectronic technology, optoelectronic components have also changed greatly. Optical elements are not only limited in refractive lenses, prisms, and mirrors. New optical components such as micro-lens arrays, holographic lenses, and diffractive elements are also used in various optoelectronic devices ...
Xiujian Li +3 more
openaire +1 more source
Diffractive components: holographic optical elements
1993Besides refractive and reflective components, planar diffractive optical elements are promising for free space optical interconnects. The content of this chapter is focused on holographic optical elements (HOEs), which are diffractive elements fabricated by recording the interference pattern of an object and a reference wave in a photosensitive ...
Hans Peter Herzig, René Dändliker
openaire +1 more source
Fabrication of Diffractive Optical Elements
2017In earlier chapters, the design and analysis of simple and multifunctional DOEs using different techniques are presented. In this chapter, pre-fabrication techniques such as designing the lithography files, etc., and fabrication techniques with basic fabrication recipes are presented. The fabrication of micro-optical elements using photolithography has
A. Vijayakumar, Shanti Bhattacharya
openaire +1 more source
Diffractive optical elements for optoelectronics
Diffractive Optics: Design, Fabrication, and Applications, 1992Diffractive optical elements (DOEs) rely on the deflection of light waves by diffraction on microstructures rather than on refraction by smooth surfaces. They are well-suited for applications involving monochromatic light and lasers: They are flexible in design (synthetic holograms are designed by CAD), it is possible to fabricate array-optics (several
openaire +1 more source