Arrangement for measuring, checking and control of the position

Details Arrangement for measuring, checking and control of the position Arrangement for measuring, checking and control of the position

1973-08-13

1976-03-23

Smith, Alfred E.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

250222R, 250571, 356156, 356172, G01B 1100

Patent

active

039457303

ABSTRACT:
Arrangement for measuring, checking and control of the position of chosen points of objects with respect to an optical aiming line, which optical aiming line is determined as a connecting line between the center of an optical system of a transmitter of a light measuring beam and of the center of an optical system of a receiver, selectively sensitive to the wavelength and modulation of the light measuring beam. The position of the body with respect to this optical aiming line is determined by the screening of the light measuring beam by means of circumference of this body or by means of the edge of a screen connected with this body. A substantial feature of this invention is the application of directional optical slot systems both for the transmitter and for the receiver selection of proper sizes of outlet slots of these optical slot systems. Another substantial feature of this invention is the application of a semiconductor light emitting element in the transmitter and of a small area semiconductor photodetector with additional illumination by an auxiliary light emission diode in the receiver. Means for preventing the influence of variations of properties of the optical medium and of possible obstacles in the space of propagation of the measuring beam are equally mentioned. Furthermore means are provided for automatic control of the contact of the measuring edge of the screen with the optical aiming line and means for control of the position of the body, connected with this screen, with respect to the optical aiming line.

REFERENCES:
patent: 2050737 (1936-08-01), Schriever
patent: 2824486 (1958-02-01), Lawrance et al.
patent: 3129335 (1964-04-01), Stewart
patent: 3334236 (1967-08-01), Bacon
patent: 3604940 (1971-09-01), Matthews
patent: 3655989 (1972-04-01), Robinson
patent: 3708232 (1973-01-01), Walsh
patent: 3730633 (1973-05-01), Kennedy
patent: 3778168 (1973-12-01), Willner
patent: 3795449 (1974-03-01), McKay

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