overhead projector
Sign in to saveAlso known as OHP, Overhead projectors, Overhead Projectors
device that projects a transparent image
~16 min read
Encyclopedic overview
Overhead projector in operation during a classroom lesson
An overhead projector (often abbreviated to OHP), like a film or slide projector, uses light to project an enlarged image on a screen, allowing the view of a small document or picture to be shared with a large audience.
Excerpted from Wikipedia’s “overhead projector” article, available under the CC BY-SA 4.0 licence.