Video projection device having a converter lens attachably...

Details Video projection device having a converter lens attachably... Video projection device having a converter lens attachably...

2011-08-30

2011-08-30

Epps, Georgia (Department: 2878)

Optics: image projectors

Lens support

Lens position adjustable

C353S100000, C359S692000, C359S773000, C359S694000, C359S686000, C359S691000, C359S823000, C359S441000

Reexamination Certificate

active

08007116

ABSTRACT:
A video projection device has one of a plurality of types of projection lenses replaceably loaded and projects a video on a screen at a fixed position. The video projection device includes: a converter lens which is composed of a plurality of lenses, which is afocal as a whole, and which is detachably provided in front of the projection lens to convert projection magnification; and a gap adjustment mechanism changing a predetermined gap in the converter lens to a setting in accordance with at least one of a projection distance to the screen and the type of the projection lens loaded.

REFERENCES:
patent: 4614974 (1986-09-01), Toyama
patent: 5339193 (1994-08-01), Korpert et al.
patent: 6583939 (2003-06-01), Yoshikawa et al.
patent: 6587159 (2003-07-01), Dewald
patent: 2001/0003493 (2001-06-01), Yoshikawa et al.
patent: 2007/0076302 (2007-04-01), Inamoto
patent: 2000-249919 (2000-09-01), None
patent: 2001-159733 (2001-06-01), None
patent: 2003-156685 (2003-05-01), None
patent: 2003-241094 (2003-08-01), None
patent: 2004-309895 (2004-11-01), None
patent: 2005-62212 (2005-03-01), None
patent: 2006-84739 (2006-03-01), None

Affiliated with

Also associated with

Rating

Video projection device having a converter lens attachably... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Video projection device having a converter lens attachably..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video projection device having a converter lens attachably... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2694155