Optical: systems and elements – Having significant infrared or ultraviolet property
Patent
1993-11-23
1996-12-24
Epps, Georgia Y.
Optical: systems and elements
Having significant infrared or ultraviolet property
359629, 359634, 356345, G02B 110
Patent
active
055878318
ABSTRACT:
In a self-supporting beam-splitter (1), in particular for use in an FTIR-spectrometer for the far-infrared region, with an optical thickness on the order of the interesting wavelength region, the foil beam-splitter (1) consists of an undoped semi-conducter material or carbon which is transparent in the far-infrared, and is preferentially made from thin silicon sheets or diamond foil in the thickness region between 2 .mu.m and 125 .mu.m. In this fashion, an extremely high efficiency for the beam-splitter is achieved, whereby little or no resonant absorption takes place due to the beam-splitter in the interesting wavelength region.
REFERENCES:
patent: 4632553 (1986-12-01), Vidrine et al.
patent: 5225926 (1993-07-01), Cuomo et al.
patent: 5258872 (1993-11-01), Johnson et al.
Article "Self-Supporting Thin-Film Beam Splitter for Far-Infrared Interferometers" of G. Kampffmeyer, published Appl.Phys. 14, 313-317 (1977).
Prospects of Virginia Semiconductor Inc., Fredericksburg, Virginia USA dated 24th May 1988 and 22nd May 1990.
C & EN Special Report dated 15th May 1989, pp. 24 to 39.
Gast Jurgen
Simon Arno
Bruker Analytische Messtechnik GmbH
Epps Georgia Y.
Steady Jacqueline M.
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