Abstract

A simple, inexpensive, all solid-state analog computer has been developed for calculating the visual range. Using an input signal from a transmissometer, the computer calculates the visual range by repeatedly solving the Allard and Koshmieder visibility laws. It is accurate to ±2.0% for visual ranges of between 500 ft (150 m) and 5000 ft (1500 m).

© 1976 Optical Society of America

Directional variation of visual range due to anisotropic atmospheric brightness

Joseph P. Pichamuthu
Appl. Opt. 44(8) 1464-1468 (2005)

The Use of an Analog Computer in Side-On Arc Spectroscopy

J. B. Shumaker and C. R. Yokley
Appl. Opt. 3(1) 83-87 (1964)

Coherent optical adaptive techniques: design and performance of an 18-element visible multidither COAT system

J. E. Pearson, W. B. Bridges, S. Hansen, T. A. Nussmeier, and M. E. Pedinoff
Appl. Opt. 15(3) 611-621 (1976)

Optical Analog Computers

Barton J. Howell
J. Opt. Soc. Am. 49(10) 1012-1021 (1959)

Atmospheric visibility measurement by a modulated cw lidar

Dennis K. Kreid
Appl. Opt. 15(7) 1823-1831 (1976)