Computer Science
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988itp..work..153m&link_type=abstract
In NASA, Ames Research Center, Second Workshop on Improvements to Photometry p 153-178 (SEE N89-13310 04-89)
Computer Science
Calibrating, Cooling, Detectors, Helium, Lasers, Photometers, Radiometers, Accuracy, Cryogenics, Errors
Scientific paper
Laser sources whose intensity is determined with a cryogenic electrical substitution radiometer are described. Detectors are then calibrated against this known flux, with an overall error of 0.028 percent (0.3 mmag). Ongoing research has produced laser intensity stabilizers with flicker and drift of less than 0.01 percent. Recently, the useful wavelength limit of these stabilizers have been extended to 1.65 microns by using a new modular technology and InGaAs detector systems. Data from Si photodiode calibration using the method of Zalewski and Geist are compared against an absolute cavity radiometer calibration as an internal check on the calibration system.
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