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CRT rear projection of BIG images

Discussion in 'Projectors, Screens & Video Processors' started by scdakin, Apr 6, 2005.

  1. scdakin

    scdakin
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    (In a nutshell) what's the best screen for rear
    projecting BIG images with CRT projectors?

    (Detail) Okay, this is a very specific problem.
    I have a Barco 1208 that i'm using for a
    research project using large images (~100
    deg. of visual angle). This requries viewers
    to sit near to the screen (around 80cm) so
    forcing one into rear projection (otherwise
    the viewer gets in the way of the beam).

    Problem is that for some surfaces suitable for rear projection
    with CRT e.g. Draper Cineflex, the gain drops away very
    quickly as a function of viewing angle (e.g. from 2.5
    to 0.5 from 0 to 50 deg viewing angle). This reduction
    in transmission means that the edges of large displays
    will be invisible.

    Two solutions suggest themselves.
    (a) A better screen surface.
    (b) Compensate by manipulating the luminance across the
    image.

    I'd rather the former if anyone has any ideas. I'd be willing to
    sacrifice some gain for lower dependence on viewing angle.
     
  2. ledoctt

    ledoctt
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    Hi the best screen for rétroprojection, it's a DNP lentille fresnel Wide angle Black stripe..Barco used this screen on Rétrographics 800,801s 808s etc.. But it's very expensive...
     
  3. Chris Frost

    Chris Frost
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    Paradigm is the UK distributor of DNP screens. Their web address is http://www.rearpro.com/ Have a look at the case studies.

    Regards
     

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