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Topic: Rear projector screen (Read 17670 times)
davidjmortimer
Posts: 29
Karma: +5/-0
Rear projector screen
on:
July 30, 2009, 03:46:59 AM
I found this link to instructions on making a rear projection screen for classroom use.
http://www.instructables.com/id/Rear-Projection-Wiimote-IWB-Interactive-White-Boa/
Has anyone tried this and succeeded? What material did you use?
Tell all please?
Cheers
DJM
benpaddlejones
Support Admin
Posts: 1178
Karma: +49/-0
Re: Rear projector screen
Reply #1 on:
July 30, 2009, 06:44:16 AM
DJM
Yes I did this with an old mobile whiteboard (the ones that flip). I secured the frame then used 3mm lighly smoked perspex. Worked a treat.
Make sure your project has rear projection mode so the image is flipped. Then go a a sign shop or perspex & glass shop. Take your project and find which material works best. The guys running the shop were so fasinated with what I was doing they were pulling differnet materials out left right and centre.
joestewart also told me cheap disposible plastic table cloths also work a treat. Could be a good place to start.
benpaddlejones :-)
See my full profile and links on my Google Profile:
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jdkestewart
Posts: 44
Karma: +8/-0
Re: Rear projector screen
Reply #2 on:
July 30, 2009, 07:47:52 AM
Hi,
Here's a screen made from the cheap disposable table cloths. They are white and $2 each. I used 3 for the play. You can buy them from the "cheap" warehouse stores. They were taped and hung from the rafters of the room. and were taped to a wooden beam which lay on the floor. The data projector was placed about 3 meters behind this screen and provided all the backdrops and scenes for the play which was a humourous version of Cinderella. In the dark, it gave a huge, very clear image. Over 3 metres wide by 2 metres high. The best part, no shadow was being cast on the image. The children performed in front of this. Looked very impressive. You do need to flip / mirror the image on the data projector settings so that text is able to be read. You wouldn't want it this big for normal classroom use though.
If one tablecloth was stretched across a light wooden frame it should work. As I took this photo before the concept of the wiimote (back in 2006) I haven't tested if the IR Pen can be detected through the plastic. If not, the wiimote would need to be placed behind or to the side of the user.
Good luck,
Joe.
davidjmortimer
Posts: 29
Karma: +5/-0
Re: Rear projector screen
Reply #3 on:
July 31, 2009, 12:43:13 AM
Thanks Guys,
Any ideas on how to get rear projection mode? Can this be done with software?
Cheers
DJM
Nevermind - I've just worked out it is a projector function
«
Last Edit: July 31, 2009, 11:55:34 PM by davidjmortimer
»
bbzs
Posts: 1
Karma: +0/-0
Re: Rear projector screen
Reply #4 on:
July 31, 2009, 04:36:19 AM
I'm using the rear projection of the room features table. Traditional chalk board behind the projector from the rear window. Thus, the two tables in turn use the teaching period.
http://www.youtube.com/watch?v=LH99hoaqtsg
tebteach
Posts: 2
Karma: +0/-0
Re: Rear projector screen
Reply #5 on:
August 15, 2009, 12:12:46 PM
The rear-projection instructable is my project. I made the frame from lumber from a home supply store. And I purchased the rear projection screen material from rose brand, it is grey in color, the link is on the instructable. I tried using the table cloth or shower curtain method and the had terrible Hot-spotting in the middle of the screen.
If you have any specific questions let me know.
benpaddlejones
Support Admin
Posts: 1178
Karma: +49/-0
Re: Rear projector screen
Reply #6 on:
August 15, 2009, 09:32:33 PM
tebteach
The instructable is some great work :-)
benpaddlejones
See my full profile and links on my Google Profile:
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davidjmortimer
Posts: 29
Karma: +5/-0
Re: Rear projector screen
Reply #7 on:
August 19, 2009, 05:12:51 AM
tebteach,
I echo Ben's comments, the instructable is very interesting, I am interested in persuing somthing with a hard surface though. Have you tried using perspex sheets? I have seen some discussion of this being used in some dj/vj forums...
Cheers
DJM
citysurf
Posts: 2
Karma: +0/-0
Re: Rear projector screen
Reply #8 on:
September 21, 2010, 07:21:36 AM
Hi,
I just koined the forum. It is a fantastic technology which can be applied to many industries.
It is perfect to see system work with rear projection. I have a very important question.
Lets say we put the projection film onto the 20mm thick shop window.
Will that still work?
Has anyone tried this?
Before, start setting up a system it will be good to know.
Thanks.
boonjin
Posts: 929
Karma: +28/-0
Smoothboard Developer
Re: Rear projector screen
Reply #9 on:
September 21, 2010, 09:30:47 AM
Hi,
If the IR can be transmitted through the thick window, it should work.
You may want to try out with an IR pen and your handphone camera.
A potential issue may be stray IR sources detected from sun light.
Regards,
Boon Jin
Smoothboard
Wii Whiteboard
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Wiimote Whiteboard
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collaborate with multiple iPads and Android Tablets
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citysurf
Posts: 2
Karma: +0/-0
Re: Rear projector screen
Reply #10 on:
September 21, 2010, 10:48:15 AM
Hi,
Thank you very much for your help.
It is good to hear that, as soon as I try in a few days, I will let you know.
Whole idea is using the application from outside of shop window, which is really exciting.
Hopefully, sun light will not be an issue, since rear projection will be used for the system.
Cheers
boonjin
Posts: 929
Karma: +28/-0
Smoothboard Developer
Re: Rear projector screen
Reply #11 on:
September 21, 2010, 06:55:59 PM
Hi,
If the Wiimote is facing out from the shop towards the window, there may be sun light detected.
All the best in your experiment.
Regards,
Boon Jin
Smoothboard
Wii Whiteboard
/
Wiimote Whiteboard
with annotation features and
collaborate with multiple iPads and Android Tablets
!
Smoothboard for Mac
Using a Mac? Now you can annotate on PowerPoint or Keynote slideshows!
BoonJin[/url
Ulfilas
Posts: 26
Karma: +0/-0
A Light Shines in the Darkness...
Re: Rear projector screen
Reply #12 on:
October 08, 2010, 06:56:50 AM
the guys over at friispray.co.uk have used it on a shop window at night.
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