Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Test head for optically inspecting workpieces comprising a lens for elongating a laser spot on the workpieces










Image Number 15 for United States Patent #7292329.

An optical test head comprises a laser source for providing a laser beam. The laser beam passes through a cylindrical lens for modifying the shape of the beam and a spherical lens for concentrating the beam onto a workpiece (typically a magnetic disk platter). The cylindrical lens both a) elongates the laser beam along the radial direction of the platter (by reducing the effective numerical aperture in the radial direction); and b) causes the beam to be out of focus in the radial direction (although the beam is typically in focus in the circumferential direction). The size of the beam in the radial direction is substantially insensitive to the position of the cylindrical lens.








 
 
  Recently Added Patents
Point-of-sale cart
Cap
Method and system for providing cloud based network security services
Petunia plant named `Bartpet001`
Transmission device
Cable exit trough with insert
System, method and apparatus for pausing multi-channel broadcasts
  Randomly Featured Patents
Device for heating a golf ball
Dielectric resonator
Printing system, print request terminal, compression algorithm selecting program and printing method
Molding device and method for setting up mold
Cable bushing
Switch box
Chimeric construct of mungbean yellow mosaic india virus (MYMIV) and its uses thereof
Lottery game with method for playing a lottery game using multiple independent lottery results
Primary side sensing for isolated fly-back converters
Hand held mixing and heating device