Zoom lens system and display apparatus

Details Zoom lens system and display apparatus Zoom lens system and display apparatus

2008-07-15

2008-07-15

Mack, Ricky L (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S676000

Reexamination Certificate

active

07400455

ABSTRACT:
A zoom lens system that has two lens groups with respectively negative and positive refractive powers in that order from a display medium, such as a screen, side is provided. The first lens group and the second lens group respectively include at least one aspherical surface. An air distance dw between the first lens group and the second lens group at the wide angle end, an air distance dt between the first lens group and the second lens group at the telephoto end, a combined focal length f1of the first lens group, a combined focal length f2of the second lens group, and the combined focal length fw of the zoom lens system at the wide angle end satisfy the following conditions: 0.05<dt/dw<0.1; dt<2.5 mm; 1.3<|f1/fw|<1.6; 1.1<|f2/f1|<1.4.

REFERENCES:
patent: 7253966 (2007-08-01), Saori
patent: 2007/0070518 (2007-03-01), Muratani et al.
patent: 2002-148515 (2002-05-01), None
patent: 2004-240309 (2004-08-01), None

Affiliated with

Also associated with

Rating

Zoom lens system and display apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2807283