Results 251 to 260 of about 31,227 (304)
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Birefringent omnidirectional reflector
Applied Optics, 2004Anisotropic optical coatings offer unique polarizing properties, unmatched by conventional isotropic devices. Here we demonstrate the fabrication of a birefringent omnidirectional reflector, a type of photonic crystal, which exhibits complete reflection of radiation at 1.1 microm for all incidence angles and polarizations.
K., K. Kaminska, Robbie, K.
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Birefringent imaging spectrometer
Applied Optics, 2002A Fourier-transform imaging spectrometer, believed to be novel, based on the Savart polariscope is presented. There is no slit in this instrument, which means that it has a high throughput. The principle and the system configuration are described. Several preliminary experimental results are shown.
Gao, Zhan +3 more
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Biopolymers, 1991
AbstractThe total strain birefringence of F‐actin isolated from chicken gizzards was measured as a function of elongation in thin transparent films. Each film held at a certain elongation in a jig was allowed to swell in a penetrating but nondissolving liquid. Seven liquids with different refractive indices were employed.
S K, Kakar, F A, Bettelheim
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AbstractThe total strain birefringence of F‐actin isolated from chicken gizzards was measured as a function of elongation in thin transparent films. Each film held at a certain elongation in a jig was allowed to swell in a penetrating but nondissolving liquid. Seven liquids with different refractive indices were employed.
S K, Kakar, F A, Bettelheim
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Broadband Birefringent Metainterfaces
Conference on Lasers and Electro-Optics 2012, 2012We report broadband birefringent metainterfaces comprising 2D arrays of phased optical antennas that can create light beams with arbitrary polarization states and arbitrary propagation directions over a wide spectral range (from λ=5 to 14 μm).
N. Yu +5 more
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Reversibility of photoinduced birefringence in ultralow-birefringence fibers
Optics Letters, 1996New measurements of the birefringence induced in ultralow-birefringence fibers by a succession of orthogonally polarized UV side exposures show the reversibility of the process. Moreover, it is shown that the birefringence growth depends on two parameters, the total irradiation dose and the nature of the successive polarized UV side exposures.
T, Meyer +5 more
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Improvements in birefringent filters 6: Analog birefringent elements
Applied Optics, 1980A 100-mA analog birefringent element has been built from a polarizing wide field solid Michelson interferometer. The analog element behaves on-axis identically to a crystal element but has the field characteristics of a wide field Michelson. It is demonstrated that by proper choice of glasses for the arms of the Michelson the wide field condition can ...
A M, Title, H E, Ramsey
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Single-shot quantitative birefringence microscopy for imaging birefringence parameters
Optics Letters, 2019A method for realizing 2D single-shot measurements of birefringence parameters (including both retardation and optic axis orientation) of anisotropic materials using a simple recording setup and an efficient processing algorithm is proposed. The recording setup can be built simply by inserting a circular polarizer and a polarization beam splitter ...
Zhen-Jia, Cheng +4 more
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Nature, 1950
IT has been known for some time that the cell membrane of an amœba in water is birefringent. The optical axis lies radially, and the sign is positive with respect to the tangent1 (Fig. 1). I have found that if an Amœba proteus is fixed for about 10 min.
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IT has been known for some time that the cell membrane of an amœba in water is birefringent. The optical axis lies radially, and the sign is positive with respect to the tangent1 (Fig. 1). I have found that if an Amœba proteus is fixed for about 10 min.
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Applied Optics, 1969
Narrow band mirrors composed of a polarizer, a stack of lossless birefringent crystals, and a conventional mirror are described. Curves showing the reflectance characteristics of the mirrors are included. Design data are tabulated for narrow band mirrors that have appreciable between-peak reflectances because of the Gibbs phenomenon as well as for ...
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Narrow band mirrors composed of a polarizer, a stack of lossless birefringent crystals, and a conventional mirror are described. Curves showing the reflectance characteristics of the mirrors are included. Design data are tabulated for narrow band mirrors that have appreciable between-peak reflectances because of the Gibbs phenomenon as well as for ...
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