light valve


nounElectricity.
  1. a light-transmitting device having transmissions that vary in accordance with an electric input, as voltage, current, or an electron beam, used chiefly for recording sound on motion-picture film.

Origin of light valve

1
First recorded in 1925–30

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use light valve in a sentence

  • It will be noticed that a light valve-spring is shown in drawing.

    Aviation Engines | Victor Wilfred Pag