Projector Overhead Mount
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 3M Projector Lamp for 2770T 9050 9060 9070 9080 9100  US $27.74
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 Projector Lamp for 3M 3M 9550 9800 Overhead Projectors US $63.64
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Document Camera
Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (January 2010)
Samsung document camera
Document camera with a gooseneck arm
Document cameras, also known as visual presenters, digital visualizers, ("visualisers" in the United Kingdom) digital overheads, and docucams, are real-time image capture devices for displaying an object to a large audience. They are, in essence, high-resolution web cams, mounted on arms so as to facilitate their placement over a page. This allows a teacher, lecturer or presenter to write on a sheet of paper or to display a two or three-dimensional object while the audience watches.
Document cameras are typically used in classrooms or scientific presentations and connected to video projectors. They replaced overhead projectors, which were formerly used for this purpose. Most document cameras can also send a video signal to a computer via USB cable. More commonly these days document cameras will also be connected to an interactive whiteboard (like a Qomo board, Smartboard, Activboard or other brands)instead of a standard screen.
Many portable document cameras incorporate a flexible gooseneck design for ease of use, and some are capable of high-definition display. High-definition document cameras include an HDMI output port.
Most document cameras can also be supplied with an accessory so that they can be used with a microscope.
According to recent research by Futuresource Consulting over 11k visualisers were sold in UK in 2008 and Futuresource forecasts that over 17k will be sold in 2009. The market is valued at 12 million in 2009 increasing 53% in 2010 to 18 million. 1 in 30 UK school classrooms now have a visualiser that will increase to 1 in 10 by 2010.
As of 2008[update], the most economical document cameras capture XGA resolution images of 1024768 pixels. Document cameras that capture SXGA images capture a resolution of 12801024 which equates to 66% more pixels than XGA images. Higher resolution images contain more (smaller) pixels and provide sharper detail. UXGA is considered high-definition and equates to 19201080 pixels.
Categories: CamerasHidden categories: Articles lacking sources from January 2010 | All articles lacking sources | Articles containing potentially dated statements from 2008 | All articles containing potentially dated statements
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What's the best way to hook up an overhead projector to a laptop?
I'm looking to purchase and install a ceiling mounted projector, but have no idea how to run my laptop through it when it's 12 feet over my head. I would install it against the back wall of my room but would prefer to have the laptop with me near the front of the room (about 30feet away). Any Ideas?
Get a 30' cable from http://www.bluejeanscable.com
If you can use DVI, that'd be better than VGA, but with a high quality cable and a relatively low resolution, you won't notice much difference.
