Optics and photonics � Optical materials and components � Specification of calcium fluoride used in the infrared spectrum

2020 ◽  
Keyword(s):  
Infrared Spectrum ◽  
Calcium Fluoride ◽  
Optical Materials

scholarly journals Tests of Cryogenic Fabry–Perot Cavity with Mirrors on Different Substrates

2019 ◽  
Vol 9 (2) ◽  
pp. 230
Author(s):  
Mickail Kuvshinskii ◽  
Sergei Oreshkin ◽  
Sergei Popov ◽  
Valentin Rudenko ◽  
Ivan Yudin ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Calcium Fluoride ◽  
Low Temperatures ◽  
Optical Materials ◽  
Optical Glass ◽  
Temperature Range ◽  
Low Thermal Expansion ◽  
Fabry Perot ◽  
Integral Characteristics ◽  
Birefringence Effect

Experiments were performed with Fabry–Perot optical resonators in vacuum at low temperatures. Mirrors were applied on substrates of various optical materials. An infrared laser with a wavelength of 1.064 microns was used. The pump power at the maximum could reach 450 mW. The evolution of the optical properties of the FP cavity was traced in the temperature range 300–10 K. The main parameters measured were the integral characteristics of the FP resonances–sharpness (finesse) and contrast of interference. Three types of substrates were tested: a sitall, an optical glass with ultra low thermal expansion (ULE); sapphire; and calcium fluoride. During cooling, the degradation of the integral characteristics of the FP cavity was observed for the sitall mirrors due to the loss of the properties of ULE, and for sapphire mirrors due to the birefringence effect. The satisfactory constancy of the integral characteristics of the FP resonator on calcium fluoride was demonstrated in the entire temperature range studied.

Fourier transform infrared spectrum of 13C32S2 in the 3v3 band region

1996 ◽  
Vol 89 (4) ◽  
pp. 1145-1155
Author(s):  
JACQUES WALRAND ◽  
GHISLAIN BLANQUET ◽  
JEAN-FRANCOIS BLAVIER ◽  
HARALD BREDOHL ◽  
IWAN DUBOIS
Keyword(s):  
Fourier Transform ◽  
Infrared Spectrum ◽  
Fourier Transform Infrared ◽  
Band Region

Field - and Photoassisted Field Emission Studies of Calcium Fluoride Coated Silicon Tips

1996 ◽  
Vol 06 (C5) ◽  
pp. C5-129-C5-134
Author(s):  
V. N. Konopsky ◽  
V. V. Zhirnov ◽  
N. S. Sokolov ◽  
J. C. Alvarez ◽  
E. I. Givargizov ◽  
...  
Keyword(s):  
Field Emission ◽  
Calcium Fluoride ◽  
Emission Studies

The far infrared spectrum of H2O2 observed and calculated rotational levels of the torsional states : (n, τ) = (0, 1), (0, 3) and (1, 1)

1988 ◽  
Vol 49 (11) ◽  
pp. 1901-1910 ◽  
Author(s):  
F. Masset ◽  
L. Lechuga-Fossat ◽  
J.-M. Flaud ◽  
C. Camy-Peyret ◽  
J.W.C. Johns ◽  
...  
Keyword(s):  
Infrared Spectrum ◽  
Far Infrared

DETERMINATION OF MICRO-AMOUNTS OF 5β-PREGNAN-3α-OL-20-ONE IN URINE USING INFRARED-SPECTROMETRY

1962 ◽  
Vol 41 (2) ◽  
pp. 234-246 ◽  
Author(s):  
H. J. van der Molen
Keyword(s):  
Infrared Spectrum ◽  
Quantitative Determination ◽  
Acid Hydrolysis ◽  
Chromatographic Separation ◽  
Pure Form ◽  
Infrared Spectrometry ◽  
Hydrolysis Of

ABSTRACT A procedure for the quantitative determination of 5β-pregnan-3α-ol-20-one in urine is described. After acid hydrolysis of the pregnanolone-conjugates in urine, the free steroids are extracted with toluene. Pregnanolone is isolated in a pure form as its acetate; after chromatographic separation of the free steroids on alumina, the fraction containing pregnanolone is acetylated and rechromatographed on alumina. Quantitative determination of the isolated pregnanolone-acetate is carried out with the aid of the infrared spectrum recorded by a micro KBr-wafermethod. The reliability of the method under various conditions is discussed under the headings, specificity, accuracy, precision and sensitivity. It is possible to determine 30–40 μg pregnanolone in a 24-hours urine portion with a precision of 25%.

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