Title :
Determination of optical constants of solids by an automatic reflectometer
Author :
Yang, Jeng-rern ; Lue, Juh Tzeng
Author_Institution :
Nat. Tsing-Hua Univ., Hsinchu, Taiwan
fDate :
6/1/1988 12:00:00 AM
Abstract :
An absolute reflectance spectrometer was designed. The instrument is based on an Apple II microcomputer which automates data acquisition, curve fitting, Kramers-Kronig integration, and data plotting. In this system, both the positions of the sample and the detectors are fixed during measurement. The reference and sample signals are detected by scanning a mirror which is engaged with a precise stepping motor. The computer controls all the peripheral instruments; therefore the need of continuous attention to the gain control, frequency scanning, and mirror adjustment is eliminated. Versatile software allows the collected data to be easily manipulated and analyzed
Keywords :
Apple computers; computerised instrumentation; curve fitting; data acquisition; integration; microcomputer applications; optical constants; optical variables measurement; reflectometry; Apple II microcomputer; Kramers-Kronig integration; absolute reflectance spectrometer; automatic reflectometer; curve fitting; data acquisition; data plotting; frequency scanning; gain control; mirror adjustment; optical constants; optical variables measurement; scanning; solids; stepping motor; Curve fitting; Data acquisition; Detectors; Instruments; Microcomputers; Mirrors; Position measurement; Reflectivity; Solids; Spectroscopy;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
