A HIGH RESOLUTION, FAR INFRARED DOUBLE-BEAM LAMELLAR GRATING INTERFEROMETER.
Abstract
A high resolution far infrared lamellar grating interferometer which operates in either a single-beam or a double-beam differencing mode of operation is described. The instrument covers a frequency range of 10 to 125/cm (1000 to 80micron). To illustrate the general performance of the instrument, the pure rotational spectrum of water vapor between 15 and 115/cm is presented. It is estimated that the absorption line centers of strong isolated lines are measured to within + or - 0.008/cm. To illustrate the resolution of the instrument, low wavenumber portions of the pure rotational spectrum of DC1 are shown. The Cl35 -Cl37 isotope splitting of the J = 2 to 3 transition (32.3/cm) is clearly resolved. The calculated separation of these two lines is 0.904/cm. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1966
- Accession Number
- AD0485282
Entities
People
- Dale Vrabec
- Jerome M. Dowling
- Richard T. Hall
Organizations
- The Aerospace Corporation