Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Optical fingerprint imaging device










Image Number 2 for United States Patent #4925300.

Apparatus suitable for imaging fingerprints directly from a finger in contact with a transparent surface of a lens is described. The conical nature of the contact surface affords the opportunity for a single such surface to accommodate a wide range of finger sizes. The front surface of the lens is conical, and a light source is provided for illuminating the finger, with ridges of the fingerprint being imaged and light illuminating the papillary valleys being refracted away from the imaging means.








 
 
  Recently Added Patents
Atmospheric treater with roller confined discharge chamber
Electrode for a plasma torch
Summarization of short comments
Navigating applications using side-mounted touchpad
Solar cell using polymer-dispersed liquid crystals
Application authentication system and method
Electrical converter with variable capacitor
  Randomly Featured Patents
Luminaire hinge and latch
Work transfer apparatus
Data gathering
Trench shoring assembly with rigid main frame support
Apparatus, system and methods for dispensing products
Reflective type liquid crystal display
Construction of the wedge filtration media laminated by wedge filter plate
Electronic device capable of wireless data transmission on the internet
System and method for electronic coupon management
Interconnect with self-formed barrier