Gadget Review: Office Overhead Projectors

Gadget Review: Office Overhead Projectors

popularnosti grafoskop povećanoj na neravnina s pojednostavljenim korištenje inkjet i laserske pisače. Prozirne folije sada se mogu ispisati lako u uredima dodavanje pogodnost za prezentacije. Slide projektora s druge strane su potpuno različite, umjesto ureda tiskane prozirnice, fotografski film slajdova se koristi. Dakle, kada se koristi tijekom prezentacije, puno truda normalno ide uz pripremu i potraga za studijima koji razvijaju fotografskih filmova. Ovi filmovi su umetnuti u otvore ringišpil tipa ili jedan i dva tipa slajd projektora.

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office overhead was initially used by the United States Armed Forces, especially during the last days of World War II. And corporate offices, schools and related persons arrested after the war, making it a powerful tool during the presentation.

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How does it work?

office overhead projector is usually as a very powerful light box (usually a halogen lamp) combined with the fan. Since the lamp generates heat during operation, the fan is obviously designed to cool and prevent the lamp from burning quickly.

box is equipped with a Fresnel lens (similar to those used in lighthouses) that collimates the light emitted by the lamp off. Transparencies from the usual office supplies are located directly across the Fresnel lens. As the light shines through, the light travels through the lens and on transparencies. He then directed a mirror that redirects the light forward to the big screen is on the wall above the frame.

for help in the exact routing collimated light, the long arm of the mirror and the lens is installed on top of the box. This extra hand is responsible for focusing and directing light forward overhead screen. Due to the design of the setup, the mirror permits and speakers and the audience to clearly see the image on the screen. In addition, the height of the mirror at the top of the frame can be adjusted, not only to focus on the image, but also project an image larger or smaller, depending entirely on the distance from the screen to the projector.

Overhead Projector Slide Projector in relation to the

popularity increased overhead to prominence with the simplified use of inkjet and laser printers. Transparencies can now be printed easily in the office to add convenience for presentations. Slide projector on the other hand are completely different, instead of the office printed transparencies, slides, photographic film is used. Thus, when used during the presentation, a lot of effort normally associated with the preparation and pursuit of studies developing photographic films. These films are inserted into holes carousel-type or one-and two types of slide projectors.

popularity increased overhead to prominence with the simplified use of inkjet and laser printers. Transparencies can now be printed easily in the office to add convenience for presentations. Slide projector on the other hand are completely different, instead of the office printed transparencies, slides, photographic film is used. Thus, when used during the presentation, a lot of effort normally associated with the preparation and pursuit of studies developing photographic films. These films are inserted into holes carousel-type or one-and two types of slide projectors.

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