Results 251 to 260 of about 128,668 (300)

Use of holographic optical elements in optical storage

Optical Society of America Annual Meeting, 1990
Reflection holographic optical elements for CD/CD-ROM optical pickups and polarizing holographic optical elements for WO and MO disk read/write heads have been developed. This talk discusses how holographic optical elements fit for optical heads, including their advantages and disadvantages from the view point of application approach.
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Holographic Optical Element for Visual Display Applications

Applied Optics, 1973
Off-axis and off-bisector reflection-type holographic visual display elements have been recorded in dichromated gelatin deposited on planar or spherical shell substrates of glass or Plexiglas. A procedure for bonding gelatin to Plexiglas is given. Holographic elements are recorded at the argon wavelength of 514.5 nm and reconstructed with spectral ...
D G, McCauley, C E, Simpson, W J, Murbach   +2 more
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Diffractive components: holographic optical elements

1993
Besides 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
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Photovoltaic concentrator using a holographic optical element

Applied Optics, 1988
A photovoltaic concentrator is proposed that uses equatorial tracking (the rotation axis of a concentrator points to the North Star), so that the change of the sun's altitude angle is minimized. The solar concentrator consists of a Fresnel lens (objective), a holographic optical element made on photoresist with 90% diffraction efficiency, and a field ...
Y W, Zhang, C S, Ih, H F, Yan, M J, Chang   +3 more
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Computer-Generated Holographic Optical Elements

2017
In earlier chapters, designs of simple binary, multilevel, and blazed DOEs using basic diffraction equations were presented. The proposed techniques were suitable for design of DOEs only for simple applications such as array generation, focusing, etc. On the other hand, DOEs generating arbitrary intensity profiles at the Fourier plane can be designed ...
A. Vijayakumar, Shanti Bhattacharya
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Curved holographic elements for optical coordinate transformations

Optics Letters, 1991
A new method for performing optical coordinate transformation is presented. It is based on a curved holographic element on which the interference pattern of two perpendicular plane waves is recorded. The design procedures and results for two curved elements that perform a one-dimensional logarithmic coordinate transformation and a Gaussian-to-uniform ...
N, Davidson, A A, Friesem, E, Hasman, I, Shariv   +3 more
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Optical Interconnects with Reflection Holographic Optical Elements

Topical Meeting on Holography, 1986
The increasing demands on micrelectronic circuits for small size and high data rates has pushed electronic interconnection technology to its limit. New techniques are being sought to circumvent these difficulties. Among them are optical interconnections.
R.K. Kostuk, J. W. Goodman, L. Hesselink
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Achromatic optical interconnects using holographic optical elements

1994 Conference on Lasers and Electro-Optics Europe, 1994
Diffractive optical elements as deflectors for optical free-space interconnects have been proposed by several authors.1,2 Unfortunately, the high flexibility of such elements is in many cases outweighed by the strong chromatic aberrations. Surface relief gratings have commonly a rather low carrier frequency (due to the limited resolution of the ...
J. Schwider, R. Volkel, S. Junger
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Phase holographic optical elements and geometrical optics

Journal of the Optical Society of America A, 1997
In the framework of geometrical optics, we show that the general ray-tracing formula for finding the direction of the diffracted rays for thin phase holographic optical elements located on any arbitrary continuous surface can be derived in a form similar to Fermat's principle.
P. J. Twardowski, J. Harthong
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Holographic optical elements recorded in silver halide sensitized gelatin emulsions Part I Transmission holographic optical elements

Applied Optics, 2001
Silver halide sensitized gelatin (SHSG) holograms are similar to holograms recorded in dichromated gelatin (DCG), the main recording material for holographic optical elements (HOE's). The drawback of DCG is its low sensitivity and limited spectral response.
J M, Kim, B S, Choi, S I, Kim, J M, Kim, H I, Bjelkhagen, N J, Phillips   +5 more
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