Results 201 to 210 of about 5,247 (233)

Astigmatism free holographic lens elements

Optics Communications, 1977
Abstract By applying the s and t formula for a hologram lens on a curved surface the conditions which must be satisfied for astigmatism free imagery are derived. It is shown that for hologram lenses formed on surfaces which are conic sections or on a plane surface, astigmatism free imagery can be obtained for extended objects.
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Lens Designs for Page-Based Holographic Storage Systems

Optical Data Storage, 2007
An aspherical-meniscus and air-spaced-spherics are identified as minimum aberration configurations for page-based holographic recordings. Air-spaced-apsherics attain imaging NA’s of 0.7 for holographic recording only, and of 0.45 for a combination of holographic and surface recording.
Yuzuru Takashima, Sergei Orlov, Lambertus Hesselink   +2 more
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The holographic/diffractive bifocal contact lens

International Contact Lens Clinic, 1989
Abstract Presently, practitioners are somewhat limited in the available options for correction of presbyopia with contact lenses. Neither the form of contact lens design (segmented, aspheric, or concentric) or fitting scheme (such as monovision) have high enough success to dominate the market. To meet this growing demand, a new holographic/diffractive
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Objective Lens for Holographic Worm Drives

International Symposium on Optical Memory and Optical Data Storage, 2005
A generalization of the objective lens for optical disk storages is proposed to accommodate holographic data storage that uses two beams. Feasibility tests by numerical and experimental studies are presented.
Jideog Kim, Y. Eugene. Pak
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Improvement of printing efficiency in holographic stereogram printing with the combination of a field lens and holographic diffuser

Applied Optics, 2018
In this paper, we use a field lens and a holographic diffuser together to improve the printing efficiency of a holographic stereogram printing system based on the effective perspective images' segmentation and mosaicking method. The light rays' regulation function of the field lens and the modulation function of the holographic diffuser are analyzed ...
Jian, Su, Xingpeng, Yan, Yingqing, Huang, Xiaoyu, Jiang, Yibei, Chen, Teng, Zhang   +5 more
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Design and fabrication of extended eye-box holographic lens using holographic printer

Digital Holography and Three-Dimensional Imaging 2019, 2019
In this paper, we propose a method to design and manufacture a holographic lens that can extend the eye-box in a near eye display. To verify the possibility, we calculated the phase profile of a holographic lens that produces multiple focal points with 5 mm intervals on the focal plane, and recorded it using a holographic wavefront printer.
Jaebum Cho, Changwon Jang, Byoungho Lee   +2 more
exaly   +2 more sources

Holographic Lens Synthesis with Optical Fibers

Topical Meeting on Holography, 1986
Conventional lenses seldom have f-numbers below the value of 1.0 for well-known reasons. However, a holographic optical elements that behaves as a lense can be constructed so that its focal length is arbitrarily small relative to its aperture.
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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
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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
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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 ...
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