Results 181 to 190 of about 5,247 (233)

In-Petri-dish acoustic vortex tweezers.

Lab Chip
Li T, Du Y, Cai B, Brooks MR, Qiu C, Wang Z, Li J, Bo L, Pan YA, Tian Z.   +9 more
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Optimal holographic Fourier-transform lens

Applied Optics, 1984
A Fourier-transform holographic optical element is described that has low aberrations over an extended range of spatial frequencies. The design is based on a relatively simple analytic solution involving optimization by minimizing the output wave-front deviations.
A A Friesem
exaly   +3 more sources

Holographically Generated Lens

Applied Optics, 1974
A holographic lens has been made that utilizes some of our earlier work on holographic aberration correction [J. E. Ward, D. C. Auth, and F. P. Carlson, Appl. Opt. 10, 896 (1971)]. The lens properties are obtained by interferometrically recording a plane wave and a pinhole generated spherical wave. The theoretical analysis is followed by the results of
A K, Richter, F P, Carlson
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Computer holographic lens

Applied Optics, 1995
Calculation of the optical path difference between the input and the focal planes of a lens is used to compute the phase introduced by the lens. This represents a new way to create computer-generated optical elements. The phase change that takes place during the light propagation between the computer-generated hologram and the image plane is taken into
J R, Moya-Cessa, F M, Santoyo, A, Morales, J R, Tyrer   +3 more
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Bifocal-polarization holographic lens

Optics Letters, 2004
We present a holographic lens with novel features recorded in an azopolymer film. Two holographic modulations, bulk birefringence and surface relief, are induced in the medium at the same time. The resultant holographic element has two focal planes, and the polarization of light in the focal points depends on the polarization of the incident light ...
Geminiano, Martinez-Ponce, Tsveta, Petrova, Natalia, Tomova, Violeta, Dragostinova, Todor, Todorov, Ludmila, Nikolova   +5 more
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Design of a holographic lens for the infrared

Applied Optics, 1987
Techniques 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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Holographic spatiotemporal lens

SPIE Proceedings, 2011
We propose a holographic spatiotemporal lens to improve spatial resolution of two-photon excitation spot as a new focusing technique of femtosecond laser pulse. Femtosecond laser pulses dispersed by a diffraction grating are irradiated to a chirped diffractive lens displayed on a spatial light modulator.
Kouhei Kimura, Satoshi Hasegawa, Yoshio Hayasaki   +2 more
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Holographic acoustical lens

The Journal of the Acoustical Society of America, 1978
The theory of an acoustical lens is presented and the construction of such a lens is described. In the present work three experiments are described, in which images of acoustical objects are formed. With the acosutical lens the intermediate step of the conventional acoustical holography of transfering the acoustical hologram to an optical system is ...
C. G. Stephanis, G. D. Hampsas
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Photometrically corrected holographic lens

SPIE Proceedings, 2009
Optical detectors for illumination measurements have the known photopic response V(λ), which is implemented with the help of colored glass filters attached to silicon detectors. In the case of high precision photometry the filter of each detector is hand prepared and the spectral response measured until it is matched to the function V(λ). This method
J. G. Suarez-Romero, R. Salas-Zuñiga
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Use Of A Holographic Lens For Producing Cylindrical Holographic Stereograms

Optical Engineering, 1981
The production of cylindrical holographic stereograms, or multiplex holograms, requires the use of a large, low f/number cylindrical lens to form a line image on the holographic film. To have an image of reasonable size for display purposes, the f/number of the lens must be quite small, on the order of f/1, and the dimensions of the lens must be ...
Richard L. Fusek, Lloyd Huff
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