Image projection system with autofocusing

Details Image projection system with autofocusing Image projection system with autofocusing

1993-12-21

1995-03-21

Cuchlinski, Jr., William A.

Optics: image projectors

Lens support

Lens position adjustable

348745, G03B 2153

Patent

active

054000939

ABSTRACT:
An image projection device comprising at least one display panel (26, 27, 28), a projection lens system (C) and a focus error detection system (FS) is described. Since the radiation source (50) and the radiation-sensitive detector (51) of the focus error detection system are arranged in planes which effectively coincide with the plane of the display panel (28), and a focus measuring beam b traverses the projection lens system twice on its path to and from a projection screen (D), an accurate and reliable focus error signal (S.sub.f) is obtained.

REFERENCES:
patent: 3469925 (1969-09-01), Urbach et al.
patent: 3620613 (1971-11-01), Watanabe
patent: 3672757 (1972-06-01), Szymber et al.
patent: 5046837 (1991-09-01), Strommer et al.
patent: 5276523 (1994-01-01), Kurematsu et al.

Affiliated with

Also associated with

Rating

Image projection system with autofocusing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image projection system with autofocusing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image projection system with autofocusing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1152721