I'm not sure of the term in English, but its one of those projectors
that are used in business courses/ universtitys ect. that project hand writing, and diagrams. My question is: I have 3m between the projector and the screen/wall. What is the maximum image size I can project from a A4 tranrparency. ( I'm projecting an image onto to a wall to paint afterwards) and I need an image of roughy 3.50 from top to bottom..... The projector I'm planning to rent is a 3M 400 portable and I want to know if this system will work (size-wise) or if I have to find another soultion... thanks in advance.
2006-11-15 21:35:27 · 3 answers · asked by Fishtalk 4 in Science & Mathematics ➔ Engineering
You have to know the distance between the projector's lamp and the transparency. If I assume it to be 20 cm, and the A4 is say 29x21 cm square then the size of the transparency would increase to16 m^2 approximately.The 0.21m will become 3.36m; and the o.29 side will become 4.64m.
2006-11-15 23:06:25 · answer #1 · answered by Mesab123 6 · 0⤊ 0⤋
I think what you are talking about is called an overhead projector.
As the image size depends on the lens in the projector (I can't find that info on this particular projector)? Contact either the people that you are renting the projector from or the projector manufacturer to get the info. 3m isn't very far to get a 3.5 metre image (I assume it the unit of the image size is metres as you stated the distance between the wall and the projector in metres?) Here is the info on how to calculate the image size http://www.conceptron.com/articles/image_size.html
Interesting website on using OHP (overhead projector) http://apu.gcal.ac.uk/ciced/Ch15.html
I hope this helps a bit.
2006-11-15 23:01:49 · answer #2 · answered by Julie B 5 · 0⤊ 0⤋
It is commonly called an overhead projector.
I am not aware of a 3M model 400.
See all 3M models on http://www.superwarehouse.com/3M_projectors/b/3/c/1936
But that doesn't matter.
What matters is:
1) Brightness of the lamp, measured in "lumen". The larger you project your image, the more lumen you need, or you need to have your room darkened to see clearly.
2) Distance from projector to the wall: The larger you project your image, the further you need to position the projector from the wall. Make sure you have that space.
Focus doesn't matter, because it is adjustable on those projectors.
2006-11-15 22:56:57 · answer #3 · answered by Marianna 6 · 0⤊ 0⤋