Patent ID: 8248596
Filing Date: 2012-08-21
Classification: G01N

Abstract:
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·cm