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
Stacked structure and stacked method for three-dimensional chip
Injection molding method and injection molding machine
Myoglobin blooming agents, films, packages and methods for packaging
Redundant power delivery
Antenna tuning on an impedance trajectory
Data consumption framework for semantic objects
Chair structure
  Randomly Featured Patents
Method and system for managing power consumption of a network interface module in a wireless computing device
Methods and apparatus for mining attribute associations
Magnetostrictive auditory system
Magnetic recording medium
Power MOSFET with integrated drivers in a common package
Cassette loading apparatus having a cassette insertion detecting switch mounted on a stationary section of the apparatus
Niche assembly for a pool and method therefor
Process for removing bitter taste from a fruit or vegetable extract, and the debittered extract thus obtained
Apparatus for monitoring grounded states of multiple DC loads of relay system
Distributed interactive simulation exercise manager system and method