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Linear diattenuation sensitive lens-free holographic microscope
Digital Holography and 3-D Imaging 2022, 2022We report the implementation of the simplest lens-free holographic microscope sensitive to linear diattenuation of biological samples using two linear polarizers. We validate our proposal by imaging calcium oxalate crystals and potato starch grains.
Maria J. Lopera, Carlos Trujillo
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Applied Optics, 2018
A holographic optical element (HOE) was developed to collimate a monochromatic light-emitting diode (LED). The fabrication was achieved by the interference of collimated and diverging beams from a 532 nm laser to produce the required photonic structure ...
S. Keshri +4 more
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A holographic optical element (HOE) was developed to collimate a monochromatic light-emitting diode (LED). The fabrication was achieved by the interference of collimated and diverging beams from a 532 nm laser to produce the required photonic structure ...
S. Keshri +4 more
semanticscholar +1 more source
Holographic projector using one lens
Optics Letters, 2010It is shown that the lens count in a Fourier holographic projector can be reduced by encoding the equivalent lens power in sets of Fresnel holograms. By using appropriately calculated Fresnel holograms in a reflective configuration to effectively share a lens between the beam-expansion and demagnification stages of a holographic projector, a reduction ...
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Laser Machining with a Holographic Lens
Applied Optics, 1971A holographic lens is used in conjunction with a pulsed ruby laser for machining single and multiple spots on a 0.12-microm thin film of tantalum deposited on glass. Spot sizes as small as 14 microm have been obtained with hologram diffraction efficiencies as great as 30%.
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Design of a holographic lens for the infrared
Applied Optics, 1987Techniques are described for the construction of a holographic lens for focusing a collimated beam to a point. The lens is constructed in the visible for use in the near infrared. A major problem is to eliminate aberrations that result from the shift between the wavelength of construction and of use.
H, Chen, R R, Hershey, E N, Leith
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Astigmatism free holographic lens elements
Optics Communications, 1977Abstract 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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Does a Fourier holographic lens exist?
SPIE Proceedings, 1991A quadratic phase holographic lens can perform Fourier transformation on a two-dimensional input, but the transform is multiplied by a detrimental parasitic phase that is caused by the off-axis configuration. Fortunately, with the proper geometry, and for a limited spatial frequency, this parasitic phase can be considered as a constant, so it need ...
R. Blank, Asher A. Friesem
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Lens Designs for Page-Based Holographic Storage Systems
Optical Data Storage, 2007An 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 +2 more
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2015 2nd International Conference on Opto-Electronics and Applied Optics (IEM OPTRONIX), 2015
Holography has been utilized for fabrication of optical elements in Silver halide photosensitive emulsion. The main drawback of transmission phase holograms in silver halide emulsion is getting darkens or discolor over the period of time, whenexposed to the ambient light, known as print-out effect. Hence this is unsuitable for out-door applications. In
Vadivelan Varadarajan +1 more
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Holography has been utilized for fabrication of optical elements in Silver halide photosensitive emulsion. The main drawback of transmission phase holograms in silver halide emulsion is getting darkens or discolor over the period of time, whenexposed to the ambient light, known as print-out effect. Hence this is unsuitable for out-door applications. In
Vadivelan Varadarajan +1 more
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Objective Lens for Holographic Worm Drives
International Symposium on Optical Memory and Optical Data Storage, 2005A 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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