Title:
スペックルフェージングへの耐性を有する光学式位置決め装置
Document Type and Number:
Japanese Patent JP2008500663
Kind Code:
A
Abstract:
One embodiment disclosed pertains to an optical positioning apparatus configured to be resistant to speckle fading. The apparatus includes at least a coherent light source and a detector. The coherent light source is configured to illuminate a surface with laser light. The detector is configured to obtain a succession of data frames of the illuminated surface, and the detector comprises N rows each including a plurality of photosensitive elements. Another embodiment disclosed pertains to an optical positioning apparatus configured to be resistant to speckle fading using calculating and filtering circuitry. The calculating circuitry is configured to calculate velocity data from the intensity data. The filtering circuitry is configured to reduce effects from speckle fading in the velocity data. Other embodiments are also described.
Inventors:
Rehoti, David, A
Roxiro, charles, bee
Trisnadi, jersey, eye
Carlisle, Clinton, Bee
Roxiro, charles, bee
Trisnadi, jersey, eye
Carlisle, Clinton, Bee
Application Number:
JP2007527423A
Publication Date:
January 10, 2008
Filing Date:
May 18, 2005
Export Citation:
Assignee:
Silicon Light Machines Corporation
International Classes:
G06F3/038; G06F3/03; H01J40/14
Attorney, Agent or Firm:
Satoshi Furuya
Takahiko Mizobe
Kiyoharu Nishiyama
Takahiko Mizobe
Kiyoharu Nishiyama