A spatial light modulator (SLM) is an object that imposes some form of spatially varying modulation on a beam of light. A simple example is an overhead projector transparency. Usually when the phrase SLM is used, it means that the transparency can be controlled by a computer.

What is meant by light modulator?

[′līt ‚mäj·ə‚lād·ər] (electronics) The combination of a source of light, an appropriate optical system, and a means for varying the resulting light beam to produce an optical sound track on motion picture film.

How is light modulated?

Integrated Optical Modulators: Modulation of Light Using Electro-Optical Crystals. With the Jenoptik integrated optical amplitude modulator, you can influence the amplitude of laser light at particularly high frequencies up to the gigahertz range with a very good extinction ratio.