Why should I arch a screen?

**Scuba Diver** · **10-27-07, 08:05 PM**

Is there a reason why some screens have a slight bend to them? It seems like the image would be distorted. Is this correct or does it have a positive effect to the viewing area that I should be aware of.

**wbassett** · **10-27-07, 08:10 PM**

Some use a torus screen for high gain screens.

It helps reduce the hot spotting effect. I have a graphic somewhere that I'll try to dig up that shows the difference between a curved screen and a flat screen. Keep in mind though that it's not a radical bend/curve being used.

Mainly CRT projectors have used torus screens, not too many digital projector users have a need for one.

**Scuba Diver** · **10-28-07, 01:44 AM**

So is this something done mainly for CRT projectors?

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