Results 201 to 210 of about 26,265 (227)

Lens design for holographic data storage systems

SPIE Proceedings, 2005
A pair of cascade lenses, a Fourier-transform lens and an imaging lens, is the key component in a volume holographic data-storage system (HDSS) for writing in and reading out the information in holographic recording material respectively. For a high-density holographic data-storage system, performances of these lenses are critical.
Ye Wang, Changjiang Liu, Yuhong Wan, Shiquan Tao   +3 more
openaire   +1 more source

Optimization Procedure For A Holographic Lens Solar Concentrator

SPIE Proceedings, 1989
The subject matter of this report is the presentation of an optimization technique developed for the design and manufacturing of a holographic lens solar concentrator. The emphasis is placed on the realization of a homogeneous diffraction efficiency distribution across the aperture of the holographic lens. The nature of the holographic process requires
C. G. Stojanoff, R. Kubitzek, St. Tropartz   +2 more
openaire   +1 more source

Equivalent-Lens Theory of Holographic Imaging

Journal of the Optical Society of America, 1968
A theory of holographic imaging is formulated in terms familiar from conventional optics. The effects of the curvatures and off-axis angles of the reference and read-out waves are described by equivalent thin lenses and prisms. The formation of the true-image wavefield is found to be completely analogous to the conventional imaging of the object ...
openaire   +1 more source

Development of bifocal holographic lens using a photopolymer

Imaging and Applied Optics 2018 (3D, AO, AIO, COSI, DH, IS, LACSEA, LS&C, MATH, pcAOP), 2018
A bifocal holographic lens using a photopolymer is presented in this paper. We used monochromatic light to evaluate the holographic optical element (HOE) by measuring the diffraction efficiencies of holographic gratings. The experimental results confirm that the bifocal holographic lens can focus on two different points.
Hui-Ying Wu, Chang-Won Shin, Sang-Keun Gil, Nam Kim   +3 more
openaire   +1 more source

Holographic lens array for future display screen

SPIE Proceedings, 2007
Holography is thought as a revolutionary science for imaging and display. With the commercialization of LCD and DMD projectors, the quality of the imaging screen becomes more and more important to the future display technology. In this paper, we propose to use the holographic lens array as the imaging screen of the projectors.
Frank C. Fan, Sam Choi, Ken Ko
openaire   +1 more source

Two-photon excitation with holographic spatiotemporal lens

Digital Holography and Three-Dimensional Imaging, 2011
We demonstrate a holographic spatiotemporal lens composed of a diffraction grating and a chirped diffractive lens to improve an axial resolution of two-photon excitation. It generates the shortest pulse only at the focal plane.
Kouhei Kimura, Yoshinori Hashizume, Satoshi Hasegawa, Yoshio Hayasaki   +3 more
openaire   +1 more source

Application Of Holographic Lens In Head-Up Display

SPIE Proceedings, 1988
Based on the holographic theory,the optical properties and characteristics of aberrations for reflective holographic lens have been described in detail in this paper. The aberration distribution of holographic lens is confirmed by experiments. According to the aberration characteristics of reflective holographic lens, calculation and analysis on ...
Chen Huangming, Lu Bo
openaire   +1 more source

The s and t formulae for holographic lens elements

Optics Communications, 1977
Abstract By considering the propagation of an astigmatic wavefront through a hologram on a curved surface expressions for the distances to the principal foci are obtained. In the special case of a system with a plane of symmetry these reduce to expressions similar to the conventional refraction/reflection s and t formulae.
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Simple lens-system models for holographic techniques

Journal of the Optical Society of America, 1973
A very simple lens-system model of a hologram is proposed for gaining an intuitive understanding of certain well-known holographic techniques. The model applies to planar (not volume) holograms whose complex amplitude transmittances are proportional to photographic exposure; the reference and reconstruction illumination can consist of either plane or ...
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Holographic Lens for Pilot's Head-Up Display

1974
Abstract : The report describes work on the fabrication of the full-scale holographic lens for a wide field of view (FOV) head-up display (HUD) system. The basic system parameters are a 25 degrees FOV, a 25 in. eye relief, and a 3 in. high by 5 in. wide exit pupil.
A. Graube, D. H. Close
openaire   +1 more source