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Cryostat achieved

Foreign code F110005823
File No. I019P007WO
Posted date Oct 19, 2011
Country United States of America
Application number 200913062276
Gazette No. 20110170093
Gazette No. 8248596
Date of filing Sep 2, 2009
Gazette Date Jul 14, 2011
Gazette Date Aug 21, 2012
International application number JP2009065359
International publication number WO2010026997
Date of international filing Sep 2, 2009
Date of international publication Mar 11, 2010
Priority data
  • P2008-227631 (Sep 4, 2008) JP
  • 2009WO-JP65359 (Sep 2, 2009) WO
Title Cryostat achieved
Abstract (US8248596)
A cryostat includes: a casing having an inlet port and exit port; a cell housing provided in the casing; a temperature controller for adjusting the temperature of the cell; a first optical path tube for guiding a light beam from the inlet port of the casing to the cell housing; a second optical path tube for guiding the light beam having passed through the cell housing to the exit port of the casing; first and second optical windows disposed at openings, exposed to the outside, of the first and second optical path tubes, respectively; and sealing materials having a water vapor transmission rate of 30000 cc·cm2·mm·sec·cm Hg×1010 or lower, disposed at the peripheries of the first and second optical windows to seal the first and second optical path tubes.
Scope of claims [claim1]
1. A cryostat comprising: a casing in which an inlet port and an exit port are formed;
a cell housing provided in the casing;
temperature control means for adjusting the temperature of the cell;
a first optical path tube for guiding a light beam entering the inlet port of the casing to the cell housing;
a second optical path tube for guiding the light beam that has passed through the cell housing to the exit port of the casing;
a first optical window and a second optical window that are disposed at openings, exposed to the outside, of the first optical path tube and the second optical path tube, respectively; and
sealing materials that are disposed at the peripheries of the first and second optical windows to seal the first and second optical path tubes and have a water vapor transmission rate of 30000 cc.cm2.mm.sec.cm Hg * 1010 or lower.
[claim2]
2. The cryostat according to claim 1, wherein the largest diameters of the first and second optical windows are each 16 mm or larger.
[claim3]
3. The cryostat according to claim 1, wherein the first and second optical path tubes contain an ethylene fluoride resin.
[claim4]
4. The cryostat according to claim 1, wherein the sealing materials contain a fluorine-containing polymer and/or a butyl rubber.
[claim5]
5. The cryostat according to claim 4, wherein the fluorine-containing polymer is at least one member selected from a binary fluororubber and a ternary fluororubber.
[claim6]
6. The cryostat according to claim 1, further comprising an aperture window for restricting a light beam entering the first optical window.
[claim7]
7. The cryostat according to claim 1, further comprising a gas flow path for feeding a gas to the first optical path tube and/or the second optical path tube.
[claim8]
8. A circular dichroism spectrometer comprising the cryostat according to claim 1.
  • Inventor, and Inventor/Applicant
  • INOUE YOSHIHISA
  • OKAMOTO KIDO
  • WADA TAKEHIKO
  • NAKAGAWA TATSUO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
IPC(International Patent Classification)
U.S. Cl./(Sub)
  • G01N021/03G
  • G01N021/15
  • G01N021/19
  • S01N021/15G
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