Lens system and image pickup apparatus

Details Lens system and image pickup apparatus Lens system and image pickup apparatus

1998-06-16

2000-12-19

Epps, Georgia

Optical: systems and elements

Lens

With graded refractive index

359682, 359690, 359691, G02B 300, G02B 1514

Patent

active

061634115

ABSTRACT:
A lens system comprising, in order from the object side, a first lens unit having a positive refractive power and a second lens unit having a negative refractive power, configured to change a focal length thereof by varying an airspace reserved between the first and second lens units, and suited for use in electronic image pickup apparatus. The first lens unit is composed only of a single homogeneous lens element and the second lens unit is composed of a single radial type gradient index lens element which has a positive power of medium.

REFERENCES:
patent: 4571032 (1986-02-01), Someya et al.
patent: 4830476 (1989-05-01), Aoki
patent: 4976521 (1990-12-01), Ishii et al.
patent: 4998807 (1991-03-01), Uzawa et al.
patent: 5221996 (1993-06-01), Kikuchi
patent: 5321552 (1994-06-01), Horiuchi et al.
patent: 5841586 (1998-11-01), Nagaoka
patent: 5973850 (1999-10-01), Nagaoka
patent: 5995295 (1999-11-01), Nagaoka

Affiliated with

Also associated with

Rating

Lens system and image pickup 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 Lens system and image pickup apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lens system and image pickup apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-275537