Front teleconverter lens system

Details Front teleconverter lens system Front teleconverter lens system

2006-11-14

2006-11-14

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S692000, C359S748000, C359S795000

Reexamination Certificate

active

07136226

ABSTRACT:
A front teleconverter lens system having superb optical performance with less production of aberration in spite of its compactness. The front teleconverter lens system includes, in order from an object, a first lens group having positive refractive power, and a second lens group having negative refractive power, and forming an afocal optical system. A diffractive optical surface is arranged in at least one of the first lens group and the second lens group. The conditional expression 1.2<φF/φR<10 is satisfied, where φF denotes the effective diameter of the most object side lens surface of the first lens group, and φR denotes the effective diameter of the most image side lens surface of the second lens group.

REFERENCES:
patent: 4171872 (1979-10-01), Baker
patent: 6097547 (2000-08-01), Ogata et al.
patent: 6424465 (2002-07-01), Suzuki
patent: 6563644 (2003-05-01), Suzuki
patent: 63 210810 (1988-09-01), None
patent: 63-210810 (1988-09-01), None
patent: 2000-171708 (2000-06-01), None
“Introduction to Diffractive Optical Elements,” Supervised by Optical Design Study Group in the Optical Society of Japan, OPTRONICS, 1997.

Affiliated with

Also associated with

Rating

Front teleconverter lens system does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3706323