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Throw ratio is a characteristic of the lens of the projector (although "projector throw" and "lens throw" are often used synonymously). Some projectors (typically larger, more expensive ones) are able to accept a variety of lenses, while lower cost projectors tend to have a permanent lens that is not designed to be changed.
A projector's throw ratio is used when installing projectors to control the size of the projected display. [1] For example, if the throw ratio is 2:1 and the projector is fourteen feet away from the screen, then the display width will be seven feet.
Epson developed the 3LCD projection technology in the 1980s, and licensed it for use in projectors in 1988. [56] Epson's VPJ-700, released in January 1989, was the world's first compact, full-color LCD projector. [52]
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Optoma's primary products are projectors and digital image processing equipment. [5] For a 2002 SIGUCCS conference, the scholar Mike Honeycutt wrote, "Optoma is not generally considered a first-tier vendor of data projectors but the features of their data projectors are comparable to better-known brands at a cheaper price."
Simulation of a spinning zoopraxiscope An early projector and seats from a movie theater. The main precursor to the movie projector was the magic lantern.In its most common setup it had a concave mirror behind a light source to help direct as much light as possible through a painted glass picture slide and a lens, out of the lantern onto a screen.
A Zenith 1200 CRT Projector based home theater. Visible extending from the ceiling are three lenses, one each for red, green and blue Black and white CRT projector. A CRT projector is a video projector that uses a small, high-brightness cathode-ray tube (CRT) as the image generating element.
Lenticular screens are most often used for ambient light rejecting projector screens for ultra-short throw projectors. [4] The lenticular structure of the surface reflects the light from the projector to the viewer without reflecting the light from sources above the screen.
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1747 Olentangy River Rd, Columbus, OH · Directions · (614) 299-9425