Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Zoom lens system










Image Number 3 for United States Patent #5357374.

A zoom lens system consisting of three groups, wherein intervals between the groups are varied to thereby change a focal length. In this zoom lens system, the number of lenses constituting the groups is one, respectively. That is, a first group is constituted by a convex meniscus lens 11, a second group is constituted by a negative meniscus lens 12 directing a strong positive surface thereof toward an object and a third group is constituted by a negative meniscus lens 13 directing a strong convex surface thereof toward the object, whereby the number of the constituting lenses can be minimized to be three, and, because of the zoom lens system consisting of the three groups, the movement of the lens is scattered, so that the movement value of the lens for obtaining a desirable zooming ratio can be decreased.








 
 
  Recently Added Patents
Combination therapy to enhance NK cell mediated cytotoxicity
Regenerative braking control to mitigate powertrain oscillation
Far field telemetry operations between an external device and an implantable medical device during recharge of the implantable medical device via a proximity coupling
Method to quantify siRNAs, miRNAs and polymorphic miRNAs
(4940
Retransmission and retransmission request in data communication systems
Schottky diode and method of manufacture
  Randomly Featured Patents
Air distribution regulator apparatus
Polycyclic sulphamate compounds suitable for use as inhibitors of aromatase and/or sulphatase
Mobile information terminal
Currency bill sensor arrangement
Underwater cleaning apparatus
Multi-level vehicle parking system
Gaming machine with mechanical reel rotatable through player's operation and confirmation method of symbol
Method and system for measuring the aging of a subject
Methods and apparatus for providing tickets from gaming devices and/or lottery terminals which are not dependent on a player's success on the underlying game
Host device, a point of deployment (POD), and a method of identifying an operation mode