Abstract

The carriage of a ruling engine is driven by a hydraulic system servo-controlled by an optical interferometer, so that the position of the carriage is determined in terms of the wavelength of light. The arrangement is free from the errors of the conventional lead-screw system and is far cheaper to construct.

© 1965 Optical Society of America

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References

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  1. H. Babcock, Appl. Opt. 1, 415 (1962).
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1962 (1)

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Figures (6)

Fig. 1
Fig. 1

Diagrammatic layout of the Horsfield hydraulic ruling engine.

Fig. 2
Fig. 2

Complete hydraulic ruling engine.

Fig. 3
Fig. 3

Ruling carriage details.

Fig. 4
Fig. 4

Details of micro-pump.

Fig. 5
Fig. 5

Circuit diagram.

Fig. 6
Fig. 6

Two oscillograms recording voltage at the output of amplifier A with B shorted. The upper trace shows the result with the micro-pump servo off and, toward the end, on. The lower trace shows the result at a higher chart speed, for the purpose of counting fringes.

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