Back to results
US 2006/0186324 A1Published application
Optical encoders for position measurements
AssigneeThe Boeing Company
InventorSteven Muenter
Life of this patent
Estimating the term…
Abstract
Systems and methods are disclosed for providing position measurement information. For example, in accordance with one embodiment of the present invention, a multiple-pitch grating is disclosed which is adapted to receive one or more laser beams and provide an output laser beam encoded with position information of the grating.
Claims20
A grating comprising:
- a first pitch period providing a first spatial frequency;
- and
- at least a second pitch period providing at least a second spatial frequency, with the first pitch period orientated in a substantially same direction as the second pitch period, and wherein the grating optically encodes a laser beam having spatial frequencies corresponding approximately to the first and second spatial frequencies of the grating to provide position information of the grating.
A grating comprising:
- a first spatial frequency orientated in a first direction and having a first pitch;
- and
- at least a second spatial frequency orientated substantially in the first direction and having at least a corresponding second pitch, wherein the grating optically encodes a laser beam having spatial frequencies corresponding approximately to the first spatial frequency and the at least second spatial frequency of the grating to provide corresponding position information of the grating.
Dependencies are inferred from the claim text.