Keystone Correction

From Lumenlab

If you have your projector ceiling or floor mounted, you will be projecting at an angle to the screen. The result of this will be what is called ‘keystoning’ which is that the image will be narrower at the top or bottom. If this is the way you plan to mount your projector you will want to use keystone correction. To adjust keystone mount the collector fresnel lens in front of your lcd panel. If you do so, you can tilt the forward fresnel to compensate for the angle of projection. It is imperative that your lens be absolutely clean and scratch free, and perfectly flat. To achieve this you can mount the forward fresnel in a metal frame or affix it to a piece of glass. You will have to mount the lens 1/2” or more from your panel to avoid the fresnel artifacting in your picture.

---

Continue to Lens Shifting or go back to Split Optics.