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

Volume

37

Issue

2

fYear

1988

fDate

6/1/1988 12:00:00 AM

Firstpage

296

Lastpage

299

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;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.6070

Filename

6070