Electro-optics Library of Congress: Electrooptics Scope Note:Note: Here are entered works on the branch of optics involving the effects of electromagnetism or electricity on light and on the optical properties of materials. Works on the branch of electronics involving devices that generate, control, transform, transmit, or sense visible, infrared, or ultraviolet radiation are entered under Optoelectronics. Works on the use of electric and magnetic fields to focus and direct beams of electrons are entered under Electron optics.