Optics: image projectors – Lens support – Lens position adjustable
Patent
1988-06-24
1991-01-29
Cuchlinski, Jr., William A.
Optics: image projectors
Lens support
Lens position adjustable
353 26A, 355 55, G03B 300
Patent
active
049881876
ABSTRACT:
An optical apparatus wherein an image is to be focused onto a generally rectangular projection surface through a projection lens and wherein a focal state at a particular location of the projection surface is to be detected to move the projection lens on the basis of the result of detection of the focal state, a method of automatically controlling the focal point of the projection lens, characterized in that, when it is found that the focal state of the particular location of the projection surface can not be detected, a focal state at another location of the projection surface is detected to move the projection lens with respect to the projection surface on the basis of the result of the detection at the other location.
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Cuchlinski Jr. William A.
Minolta Camera Kabushiki Kaisha
Scanlon Patrick R.
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