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
Multi-band dipole antenna
Methods of prognosing a rheumatoid arthritis remission phenotype
System for wireless local area network (WLAN) transmission and for coexistence of WLAN and another type of wireless transmission and methods thereof
Channel estimating method and device
Shoe
Socket type MEMS device with stand-off portion
Fast and compact circuit for bus inversion
  Randomly Featured Patents
Ski construction including wedge-shaped attachment portions
Histamine H3 receptor agents, preparation and therapeutic uses
Process for producing alpha-picoline
Heads-up display (HUD) incorporating cathode-ray tube image generator with digital look-up table for distortion correction
Colour binning of a digital image to reduce the image resolution
Portable handset radio telephone
Substituted N-biphenylyl lactams
Methods and devices to assist pulmonary decompression
Variable width tire building drum with interdigitated shoes
Work sheet processing system