Apparatus for receiving electromagnetic radiation

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

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350 66, H01J 314

Patent

active

046313982

ABSTRACT:
Apparatus for receiving electromagnetic radiation at various angles of incidence including an optical element for guiding the radiation upon a radiation detector, and magnetic drive means for adjusting the position of the optical element, characterized by the provision of a shock-resistant suspension for the magnet in the form of a plurality of linear elements in the form of coplanar taut wires or resilient bands that extend radially outwardly from and coplanar with the magnet, together with a plurality of stationary coils arranged circumferentially about the magnet, whereby the magnet can be pivoted about pivot axes, respectively, contained in the plane, and also be displaced in a direction normal to the plane (i.e., in the Z-direction). Means are provided for measuring the Z displacement of the magnet, including a spherical segment secured to a face of the magnet for interrupting, at least partially, a beam of parallel light extending from a source thereof to a surface area type light detector, thereby producing a control signal that is supplied to the drive means for the optical element.

REFERENCES:
patent: 4270048 (1981-05-01), Liebing
Moeller et al, "Elektrische Messtechnik" p. 22, 1961, B. G. Teubner Verlaesellschaft, Stuttgart, Germany.

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