Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Automatic precision measurement of spectrograms

Not Accessible

Your library or personal account may give you access

Abstract

A fully automatic comparator has been designed and implemented to determine precision wavelengths from high-resolution spectrograms. The accuracy attained is superior to that of an experienced operator using a semiautomatic comparator with a photoelectric setting device. The system consists of a comparator, slightly modified for simultaneous data acquisition from two parallel scans of the spectrogram, interfaced to a minicomputer. The software which controls the system embodies three innovations of special interest. (1) Data acquired from two parallel scans are compared and used to separate unknown from standard lines, to eliminate spurious lines, to identify blends of unknown with standard lines, to improve the accuracy of the measured positions, and to flag lines which require special examination. (2) Two classes of lines are automatically recognized and appropriate line finding methods are applied to each. This provides precision measurement for both simple and complex line profiles. (3) Wavelength determination using a least-squares fitted grating equation is supported in addition to polynomial interpolation. This is most useful in spectral regions with sparsely distributed standards. The principles and implementation of these techniques are fully described.

© 1978 Optical Society of America

Full Article  |  PDF Article
More Like This
An Automatic Comparator for Measurement of Spectra

David W. Steinhaus, Rolf Engleman, and William L. Briscoe
Appl. Opt. 4(7) 799-807 (1965)

Automatic Measurement, Reduction and Recording of Wavelengths from Spectrograms

George R. Harrison
J. Opt. Soc. Am. 25(6) 169-178 (1935)

A Rapid Precision Wavelength Measuring Apparatus

R. Hoekstra
Appl. Opt. 6(5) 807-811 (1967)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved