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Chamberlain — the company's do-it-yourself line of garage door openers. LiftMaster — the company's line of garage door openers for professional installers. Raynor — the company's line of garage door openers for professional installers. This line of professional installers is slightly less common than LiftMaster.
Electric eye for a garage door opener. An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam.
In May 1954, the Alliance Manufacturing Company first produced its own garage door opener and called it Genie. [2] In 1983 the company entered the home and shop vacuum market, and in 1985 it changed its name to Genie Home Products. [2] Overhead Door Corporation purchased the company in 1994. [2] The Genie Company is headquartered in Mt. Hope ...
A light valve (LV) is a device for varying the quantity of light, from a source, which reaches a target. Examples of targets are computer screen surfaces, or a wall screen in the case of a light projector. There are two basic principles of achieving this. One is by deflecting the light on its way to the target (a reflective LV).
Due to the size limitations of the modern compact and ultra-compact cameras, especially digital cameras, the distance between the lens and the built-in flash has decreased, thereby decreasing the angle of light reflection to the lens and increasing the likelihood of light reflection off normally sub-visible particles. Hence, the orb artifact is ...
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