COMPACT MODIFIED RETROFOCUS-TYPE WIDE-ANGLE LENS
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Oct 1, 2015
app pub date -
Mar 27, 2015
filing date -
Mar 28, 2014
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A compact modified retrofocus-type wide-angle lens with a constant overall length during focusing is described, comprising, as seen from the object, a stationary front group (G1) with positive refractive power and a rear group (G2) with positive refractive power facing an image plane (IM), comprising an aperture stop (AP) arranged therebetween in a stationary manner, wherein the rear group (G2) consists of a first rear group portion (G2a) being displaceable along the optical axis and a second rear group portion (G2b) stationary in relation to the image plane (IM), wherein the first rear group portion (G2a) and the second rear group portion (G2b) have positive refractive power and the distance between the first rear group portion (G2a) and the front group (G1) reduces during focusing from infinity to close range.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully