Super wide angel lens system using an aspherical lens

Optical: systems and elements – Lens – Reverse telephoto

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

359713, 359753, G02B 1304, G02B 1318

Patent

active

058619992

ABSTRACT:
A retrofocus type super wide angle lens system includes a front lens group of negative power and a rear lens group of positive power, arranged in this order from the object side. The front lens group consists of a negative meniscus first lens element with a convex surface facing the object side and a second lens element having at least one aspherical surface, arranged in this order from the object side. The aspherical second lens element is shaped such that it forms a biconcave lens in the vicinity of the optical axis and forms a negative meniscus lens with a convex surface located on the object side at a peripheral portion thereof.

REFERENCES:
patent: 3506339 (1970-04-01), Kazamaki
patent: 3856385 (1974-12-01), Takahashi
patent: 4952040 (1990-08-01), Igarashi
patent: 4957355 (1990-09-01), Sato
patent: 5477388 (1995-12-01), Ishiyama et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Super wide angel lens system using an aspherical lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Super wide angel lens system using an aspherical lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Super wide angel lens system using an aspherical lens will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1251341

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.