Zoom lens system using a diffractive optical element

Details Zoom lens system using a diffractive optical element Zoom lens system using a diffractive optical element

1999-03-26

2000-11-28

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359692, G02B 1514

Patent

active

061543233

ABSTRACT:
The invention relates to a high-performance, high-zoom, low-cost zoom lens system which is easy to fabricate due to a reduced number of lenses. The zoom lens system comprises a first lens group G1 having positive refracting power and a second lens group G2 having negative refracting power. For zooming, the spacing between the first and second lens groups varies. At least one diffractive surface r.sub.11 is used in the zoom lens optical system. Each lens group comprises at least two lenses. The zoom lens system satisfies condition (2) or 50<.nu..sub.d2 <85 where .nu..sub.d2 is an Abbe's number of the lens having the largest negative refracting power in the second lens group G2.

REFERENCES:
patent: 5268790 (1993-12-01), Chen
patent: 5386321 (1995-01-01), Kawamura
patent: 5481405 (1996-01-01), Simbal

Affiliated with

Also associated with

Rating

Zoom lens system using a diffractive optical element 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 using a diffractive optical element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom lens system using a diffractive optical element will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1731661