Abstract

A method for photometric calibration of infrared spectrophotometers is based on the use of a secondary transmittance standard of calcium fluoride whose transmittance has been established with a rotating sector. The transferability of intensity data among Beckman IR-7’s has been studied by measuring the absorption bands of indene. The average deviation from the mean values of 10 indene bands measured on five calibrated instruments is 0.8% transmittance. It is suggested that the residual differences after calibration are due to small variations in slit function among the instruments.

© 1963 Optical Society of America

The Effect of Extraneous Radiation on Photometric Accuracy of Infrared Spectrophotometers

James E. Stewart
Appl. Opt. 2(11) 1141-1146 (1963)

Precision of Color Measurement with the GE Spectrophotometer. II: Photometric Accuracy

Eugene C. Rhodes and Fred W. Billmeyer
Appl. Opt. 8(4) 769-773 (1969)

Performance of the Beckman IR-7 Infrared Spectrophotometer I. Frequency Reproducibility and Accuracy (630–4000 cm⁻¹)

Peter J. Krueger
Appl. Opt. 1(4) 443-453 (1962)

Performance of the Beckman IR-7 Infrared Spectrophotometer 2. Frequency Reproducibility and Accuracy (200–800 cm⁻¹)

Peter J. Krueger
Appl. Opt. 1(5) 621-625 (1962)

Design and testing of a new high-accuracy ultraviolet–visible–near-infrared spectrophotometer

Joanne C. Zwinkels and Denis S. Gignac
Appl. Opt. 31(10) 1557-1567 (1992)