projector
Sign in to savethumb|right|Acer inc.|Acer projector, 2012 thumb|Digital Light Processing|DLP type home theatre projector in use A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers. A virtual retinal display, or retinal projector, is a projector that projects an image directly on the retina instead of using an external projection screen.
Article
28 sectionsContents
- Different projector types
- Real-time
- Still images
- Moving images
- History
- Prehistory to 1100
- Shadow play
- Camera obscura
- Chinese magic mirrors
- Revolving lanterns
- 1100 to 1500
- Concave mirrors
- Fontana's lantern
- Possible 15th century image projector
- 1500 to 1700
- 16th to early 17th century
- Helioscope
- Steganographic mirror
- Magic lantern
- 1700 to 1900
- Solar microscope
- Opaque projectors
- Solar camera
- 20th century to present day
- Developments since 2020
- In popular culture
- See also
- Notes and references
thumb|right|Acer inc.|Acer projector, 2012 thumb|Digital Light Processing|DLP type home theatre projector in use A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers. A virtual retinal display, or retinal projector, is a projector that projects an image directly on the retina instead of using an external projection screen.
The most common type of projector used today is called a video projector. Video projectors are digital replacements for earlier types of projectors such as slide projectors and overhead projectors. These earlier types of projectors were mostly replaced with digital video projectors throughout the 1990s and early 2000s, but old analog projectors are still used at some places. The newest types of projectors are handheld projectors that use lasers or LEDs to project images.