High-aperture projection lens

Details High-aperture projection lens High-aperture projection lens

2006-01-24

2006-01-24

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C359S708000, C359S713000, C359S737000, C359S760000

Reexamination Certificate

active

06989937

ABSTRACT:
A six-element cinema projection lens is described in front of which an aspherized plane-parallel plate is positioned on the screen side. This arrangement permits the cost-effective design of a cinema projection lens with a relative aperture of 1:1.7 having very good image-forming properties. The high relative aperture increases the light utilization and therefore leads to savings in energy and costs. Furthermore, the projection lens can be used both for cinemascope format and for widescreen format, the differences in brightness being compensated by a variable diaphragm.

REFERENCES:
patent: 6795255 (2004-09-01), Reinecke et al.
patent: 6903804 (2005-06-01), Otomo
patent: 2001/0050819 (2001-12-01), Ohno
patent: 2003/0112525 (2003-06-01), Reinecke et al.
patent: 1 134 606 (2001-09-01), None

Affiliated with

Also associated with

Rating

High-aperture projection lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3537114