Every professional video projector is projecting off axis for easy floor or ceiling mounting.
But this is not made by tilting the projector and correcting the misaligned picture by keystone. It is made by putting the lens off axis by some offset.
This is also called lens shift.
The projector then stays in the horizontal position.
Keystone should only be used if it is not possible to install the projector in a horizontal position or if the screen is not absolutely vertical.
But this is not made by tilting the projector and correcting the misaligned picture by keystone. It is made by putting the lens off axis by some offset.
This is also called lens shift.
The projector then stays in the horizontal position.
Keystone should only be used if it is not possible to install the projector in a horizontal position or if the screen is not absolutely vertical.
My projector had a lens offset and a up and down to move the unit up and down aswell as a keystone. The lens was off axis by default so u didnt have to tilt the projector as high.
And this offset is done with a frensel cut offset with an offset mirror to guide the light through the lens
Trev
First of all, sorry for waking up an old topic.
This is my idea of keystoning, as what I'm reading from the posts above it should work, can anyone confirm this?
This is my idea of keystoning, as what I'm reading from the posts above it should work, can anyone confirm this?
An externally hosted image should be here but it was not working when we last tested it.
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