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Optical investigation of ErFeO3
Zeitschrift f�r Physik, 1967The absorption spectrum of single crystals of ErFeO3 has been investigated in the red and near infrared spectral region in the temperature range between 1.2 °K and 4.2 °K and at 20 °K and 77 °K. Between 77 °K and 4.2 °K a constant splitting of the absorption lines is observed.
R. Faulhaber +3 more
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Optical investigation of HoFeO3
Zeitschrift für Physik A Hadrons and nuclei, 1969The absorption spectra of HoFeO3 were investigated in the near infrared spectral region at temperatures of 1.2, 4.2, 20 and 77 °K respectively. At every temperatureT≦20 °K all the absorption lines show the same splitting which is attributed to the groundstate; this splitting is (7.2±0.5) cm−1 at 20 °K and decreases to (4.9±0.8) cm−1 extrapolated to 0 ...
H. Schuchert, S. Hüfner, R. Faulhaber
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Investigation of Optical Fibers for Nonlinear Optics.
1983Abstract : The principal objective of this research program is to develop single-crystal (SC) fibers for use in nonliner optical devices. This encompasses measurement of physical and chemical properties of several candidate materials, fabrication of SC fibers, and investigation of nonlinear optical applications.
Stephen C. Rand +4 more
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Optical investigation of DyFeO3
Zeitschrift für Physik A Hadrons and nuclei, 1969Optical absorption spectra of DyFeO3 have been investigated at 1.2≦T≦4.2 °K, andT=77 °K From the temperature dependent lineshift a Neel temperature ofTN=(3.8±0.5) °K is deduced for the dysprosium sublattices. The groundstate splitting due to the iron-dysprosium interactions is about 1.5 cm−1 and due to the dysprosiumdysprosium interactions (5.0±1.4) cm−
H. Schuchert, S. Hüfner, R. Faulhaber
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Ellipsometric investigations of piezo-optical effects
Thin Solid Films, 1998Abstract An introduction to the stress-induced birefringence of solids, with emphasis on cubic and amorphous materials, is given. Most available experimental data have been obtained in the frequency region below the electronic absorption edge: the corresponding coefficients of the stress-optical tensor are then real.
Cardona, M., Roennow, D., Santos, P.
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In-vivo optical investigation of psoriasis
SPIE Proceedings, 2011Psoriasis is an autoimmune disease of the skin characterized by hyperkeratosis, hyperproliferation of the epidermis, inflammatory cell accumulation and increased dilatation of dermal papillary blood vessels. Cases of psoriasis were investigated in vivo with optical means in order to evaluate the potential of in vivo optical biopsy.
D. Kapsokalyvas +6 more
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Optical investigations of atmospheric aerosol
Uspekhi Fizicheskih Nauk, 1968CONTENTS 1. Introduction 353 2. Certain Information on the Atmospheric Aerosol 355 3. Theory of Optical Properties of Aerosol 358 4. Optical Methods of Investigating the Atmosphere as Part of the General Problem of Indirect Measurements 362 5. Optical Properties of Aerosol and Microphysics of the Dispersed Phase 365 6.
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Cryostats for optical investigations
Cryogenics, 1960WE describe here some cryostats for optical investigations. These instruments have been utilized in our laboratory for several years, and have been found to be quite satisfactory. They are cheap to make and easy to use, and they are therefore convenient for research workers who are not used to low temperature techniques. We feel that the description of
P. Pesteil, R. Philip
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PASSIVE OPTICAL TECHNIQUES INVESTIGATION
1964Abstract : The parameters and trades involved when using various passive optical techniques to separate earth orbiting objects from the celestial background and the capability of orbit prediction from angle only data are presented. In addition brief discussions of the celestial background, atmospheric effects, target brightness factors, lens (optical ...
O. R. Bakeman, A. D. French
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Optical computing and investigations on writing
Applied Optics, 1976In previous years several methods have been developed for extracting significant information parameters contained in written, typed, or printed texts. They have shown that some models (optical, mathematical, or hybrid) could be described for linear and nonlinear operations.
J C, Viénot, J, Duvernoy
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