A New Mirror Light-Modulator
A vibrating mirror light-modulator developed for 200-mil push-pull recording is described. Modern magnetic materials are used in the magnetic structure to obtain high electromagnetic efficiency and therefore adequate electromagnetic damping. Distortion is limited to low values by accurate mechanical balance of the armature. An inverse shunting network, to build the modulator impedance out to a constant resistance, has been developed, making the response characteristic substantially free from driving-circuit impedance, so that any desired frequency characteristic can be obtained by the insertion of a constant-resistance equalizer.
- Print ISSN
- 0097-5834
- Published
- 1941-05
- Content type
- Original Research
- DOI
- 10.5594/J12901
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