Tuesday, June 9, 2009

Non-print equipment & services: Projection screens

The right screen surface depends on the type of projection you’re using, the size of your seating area, and the lightning in your viewing area.

Front projection

White matte Smooth non-shiny surface
Most suitable for wide shallow or square rooms
Most popular type of front projection screen
Glass beadedCoated with tiny glass beads
Reflects narrow pattern of light further back into the room
Most suitable for long, narrow rooms
Lenticular Silver corrugated material that reflects a pattern of light as wide as the matte screen and as far back as the glass beaded screen
A compromise between the beaded and matte white surface

Rear projection
Translucent Lets light shine through but scatters and softens
Mainly used for rear projection
Translucent Lets light shine through but scatters and softens
Mainly used for rear projection

A screen mounted on a 3-legged stand is called a tripod screen.

Setting up a tripod screen

1. Hold screen in a vertical position and use your foot to release the leg lock.
2. Spread legs so they extend out to their maximum distance to ensure stable support of the screen.
3. Release the upper extension rod that is inserted into the end of the metal case.
4. Rotate the metal case from vertical to horizontal position.
5. Rotate the keystone correction bar (if present) into place if you intend to use it.
6. Grasp the handle on the edge of the screen and pull the screen up and hook the handle into the extension rod or keystone correction bar.
7. Raise the extension rod to the desired height. This pulls the screen out of the metal case.
8. To collapse, reverse the procedure.

For further information about screens check:
Allen, Greg. “The Latest in projection screens.” Media & Methods; May/Jun. 2001, vol. 37 #6, p.34Available on EBSCOHost Academic Search Premier

United Visual. “How to choose a projection screen.”

Da-Lite. “Selecting the right screen”.

Da-Lite. “Guide to selecting front projection screens”.

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