With today's projectors the size of a book and costing $800, and cameras the size of a golf ball and costing less than $100 it'll be neither 1000 pounds avordupois or 1000 pounds sterling -- although it'll be much closer to 1000 pounds sterling than 1000 pounds avordupois.
-- ------------------------------------------- Tim Wescott
Nope. Seems likely to simply be a video projector and a video camera.
Probably around 1000 pounds I suspect.
Sounds like an epdiascope - used to project a picture of a page or other object rather than a transparency. Haven't seen one for years; don't no if they are still available; and no idea what they would cost.
Jerry
I don't think so. If it was, the key report of "achingly brilliantly lit paper" is missing Not to mention the lack of a heat resistant glove while writing.
Hi all,
Sometime back, I came across a particular type of OHP which uses plain paper instead of transparencies. The base was slim, similar size to a USB scanner. It seemed to have some sort of digital camera on top instead of the usual lens/mirror arrangement used to project slides. So, when writing something on the paper, instead of just seeing the silouhette of the hand+pen like in conventional OHPs, you would see a real picture projection of the hand on the wall. But the OHP only projected in black and white.
Does anybody know who makes them and where I can get more info on it?
Thanks & regards
PL
I have never seen such a device that also contains the projector, but a quite common setup is to use what is referred to as a "document camera" or "visual presenter" hooked up to either a portable or ceiling mounted projector. Most of the lecture halls in EECS at UC Berkeley are configured with such a device. They work rather well, especially since a regular pen can be seen, as apposed to the thick smearing transparency markers I can never make out.
Several manufacturers make these: elmo usa epson samsung avermedia
Prices seem to be about $2000 - $3000 standard, or $700 for a 'toy' model.
Hope this helps, Nathan
"Overhead projector" means **uses transparancies**. When you can't see thru the thing you want to project, it's called an
I made one as a kid (kindofa a camera obscura in reverse): cardboard box, floodlight, lens from magnifying glass, cardboard tube to hold the lens.
Cut a hole in the box to match the tube size.
Attach the image to be projected to the inside wall of the box, opposite the lens assy.
Mount the floodlight inside the box, pointing at the image object. More lights == stronger image, longer throws
Slide the tube in/out to focus the image on a wall.
you mean something like this?
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Bill_h
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