Reader for graph curve lines and like

Details Reader for graph curve lines and like Reader for graph curve lines and like

1977-11-10

1979-05-01

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250571, G05B 100

Patent

active

041525876

ABSTRACT:
A curve line reader of the type wherein a recording medium carrying an optically visible curve line is caused to move relatively to an electronic camera tube which electronically scans an optical image of the medium along a locus extending transversely of the recording direction to generate a video output signal containing pulses produced by the impingement of the tube scanning beam upon the curve line image is modified by the addition of a semicylindrical optical lens having a length at least equal to the transverse dimension of the recording material and arranged with its longitudinal axis lying in the plane of the scanning locus of the camera tube whereby the optical image received by the camera tube is selectively magnified in a direction parallel to the recording direction to sharpen the video output pulses generated by the curve line segments having a large directional component parallel to the scanning locus of the camera tube.

REFERENCES:
patent: 2961547 (1960-11-01), Snavely
patent: 3529084 (1970-09-01), Rich

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