Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Laser beam path length difference detector, laser phase controller, and coherent optical coupler










Image Number 4 for United States Patent #7440478.

Provided are a small-sized, low-cost, and easy-to-use laser optical path length difference detecting device, a laser optical path length difference detecting device, and a coherent optical coupling device. The laser optical path length difference detecting device detects an optical path length difference between propagation paths of a first laser beam (1) and a second laser beam (2), which are mutually coherent when the beams are propagated through two arbitrary optical paths of a plurality of laser beam optical paths. The laser optical path length difference detecting device is provided with an optical path length difference variable means (4) for changing the optical path length difference between the first laser beam (1) and the second laser beam (2), a wavefront inclination generating means (5) for inclining a wavefront of at least one of the first laser beam (1) and the second laser beam (2), and a two-dimensional detector (6) for detecting the interference light intensity distribution of the first laser beam (1) and the second laser beam (2) which have passed through the wavefront inclination generating means.








 
 
  Recently Added Patents
Data processing apparatus, activation control method, and computer-readable storage medium
System and method for reducing antivirus false positives
Implant for performance enhancement of selected transistors in an integrated circuit
Pyroelectric detector, pyroelectric detection device, and electronic instrument
Liquid dispensing apparatus
Inverter, NAND gate, and NOR gate
Tab visibility
  Randomly Featured Patents
Process for preparing alkynyl-substituted aromatic and heterocyclic compounds
Indentation testing instrument and indentation testing method
Set of tacks
Part of a vacuum cleaner
Compression and decompression methods on two-dimensional image data
Composite dielectrics for low voltage electroluminescent displays
System for downloading computer software programs
Display device, display panel unit, and information processing apparatus
Device for exterminating garden pests
Methods of immunopurification of antigens of human immunodeficiency virus type 2 (HIV-2)