Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Frequency-scanning interferometer with non-specular reference surface










Image Number 5 for United States Patent #7057742.

A frequency-scanning interferometer is modified to include a diffuse reference surface. An illuminating system produces an expanding measuring beam, portions of which reflect from a test object surface and the diffuse reference surface on converging paths to an imaging system. Interference patterns between overlapping images of the object and reference surfaces are generated at a plurality of frequencies for measuring the object surface with respect to the reference surface.








 
 
  Recently Added Patents
Method and apparatus for connecting signal lines of multiple layers to certain contacts while preventing connections with other contacts
Recording medium, playback device, integrated circuit
Sponge
Modular storage system
Printing apparatus having extendable functionality and method thereof
Method of controlling an indentation depth of an electrode into a metal substrate during welding
Systems and/or methods for using air/wind power to charge/re-charge vehicle batteries
  Randomly Featured Patents
Process for preparing organic tertiary polyphosphine monooxides
Operator restraint/control lockout system
Cooling-controlled tank for hydraulic fluid
Detection and quantitation of MN-specific antibodies.
Block copolymer composition containing polypropylene and polybutene
Supplemental mattress
Network remote power management outlet strip
Method and system for fracturing a pattern using charged particle beam lithography with multiple exposure passes having different dosages
Methods of fabricating field isolated semiconductor devices including step reducing regions
Switchable polymer printing plates with carbon bearing ionic and steric stabilizing groups