Zoom lens system and camera including the same

Details Zoom lens system and camera including the same Zoom lens system and camera including the same

2011-03-15

2011-03-15

Martinez, Joseph (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

Reexamination Certificate

active

07907355

ABSTRACT:
A zoom lens system includes, in order from the object side to the image side, four lens units having positive, negative, negative and positive refractive powers. A first lens unit includes, in order from the object side to the image side: a front subunit having a negative refractive power; a middle subunit that has a positive refractive power and moves during focusing; and a rear subunit having a positive refractive power. The zoom lens system further includes a variable apex angle prism disposed on the image side of the front subunit. An average Abbe number of materials of a negative lens element and a positive lens element included in the front subunit is set appropriately so as to suppress occurrence of decentering aberration accompanying a variation of a prism apex angle.

REFERENCES:
patent: 4927250 (1990-05-01), Suda
patent: 5677792 (1997-10-01), Hamano
patent: 6002528 (1999-12-01), Tomita
patent: 61-223819 (1986-10-01), None
patent: 07-104218 (1995-04-01), None
patent: 08-015648 (1996-01-01), None
patent: 11-101941 (1999-04-01), None
patent: 2001-021804 (2001-01-01), None

Affiliated with

Also associated with

Rating

Zoom lens system and camera including the same 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 camera including the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom lens system and camera including the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2653912