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
Warm air generating apparatus, sheet feeding apparatus, and image forming apparatus including warm air generating apparatus and sheet feeding apparatus
Method and system for routing telephony communications together with modified calling party identifier information
Placental tissue grafts
Accessing a base station
Pattern data conversion for lithography system
Minimizing mismatch during compensation
Motorized home appliance door
  Randomly Featured Patents
Fast channel change handling of late multicast join
Data packet with embedded mask
Extendable and retractable lead having a snap-fit terminal connector
Combination coin and mileage minder
Method and apparatus for surface topography measurement by spatial-frequency analysis of interferograms
Method for measuring phase boundaries of a material during machining with a machining beam using additional illumination radiation and an automated image processing algorithm, and associated d
Upside-down magnetoresistive random access memory
Apparatus for occupant detection
Photographic exposure apparatus
Mixed carbon material including graphite powder cores and surface carbon material on a surface thereof and negative electrode for nonaqueous secondary battery