Abstract

A simple analytic procedure has been developed for calibrating the wavelength drum of a Littrow-type prism spectrometer. Only three measured drum readings are required to specify the drum calibration over a broad wavelength range (uv to ir) with an accuracy of the order of the instrumental accuracy. This procedure can be applied to different prism materials for which measurements of refractive index have been performed. It is based on an approximate expression, derived from geometrical optics, relating the drum reading D(λ) to the calculated refractive index n(λ): $D=A-B{(a^2-n^2)}^{\frac{1}{2}}$. The index n(λ) is calculated from the appropriate parametric equation. The temperature for the n(λ) values need not be exactly that of the prism temperature during measurements. This expression was investigated for wavelengths in the range 0.3 μ to 2.25 μ using a sodium chloride prism. Computed drum positions D agreed with measured drum positions to within experimental error. Unknown wavelengths were computed from their measured drum positions to within the accuracy of the measurements.

© 1966 Optical Society of America

Computer Calibration of the Wavelength Drive of a Prism Spectrometer

R. E. Fryer
Appl. Opt. 6(2) 275-278 (1967)

New Calibration Method for Prism Infrared Spectrometers

Shau-Yau Ho
Appl. Opt. 10(7) 1584-1586 (1971)

Wavelength calibration model for prism-type echelle spectrometer by reversely solving prism’s refractive index in real time

Rui Zhang, Bayanheshig, Lu Yin, Xiaotian Li, Jicheng Cui, Jin Yang, and Ci Sun
Appl. Opt. 55(15) 4153-4158 (2016)

Calibration of a Prism Spectrometer

W. G. Henry and M. R. Meharry
J. Opt. Soc. Am. 51(3) 356-359 (1961)

Temperature Variation of the Index of Refraction of ADP, KDP, and Deuterated KDP*

Richard A. Phillips
J. Opt. Soc. Am. 56(5) 629-632 (1966)