The measurement of optical constants of volatile liquids |
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| Institution: | 1. Laboratory for Atomistic and Molecular Mechanics (LAMM), Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Room 1-290, Cambridge, 02139 MA, USA;2. Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA, USA;3. Center for Computational Engineering, Massachusetts Institute of Technology, 77 Massachusetts, Ave. Cambridge, MA 02139, USA;4. Center for Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA;1. Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China;2. Key Research Base of State Administration of Cultural Heritage for Evaluation of Science and Technology Research in Cultural Relics Protection Field, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | An experimental system which was devised to measure the optical constants of volatile liquids has been used to find the optical constants of two freons. The experimental arrangement is an adaptation of a free liquid surface reflectometer described in another paper from this group. In this case, however, the liquid under test and the reference liquid are not exposed to the atmosphere but are contained by cells which have infrared transmitting windows. Optical constants, n(λ) and where applicable k(λ), for two volatile liquid samples trichlorofluoromethane and 1,1,2 trichlorotrifluoroethane, which gave large absorption peaks in the infrared, have been found using the closed cell technique in the 2–13 μm wavelength region. |
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