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Class Information
Number: 250/237G
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Hoods, grating, baffles, diaphragms, masks > Gratings (moire fringes)
Description:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7446873 |
Reflective alignment grating |
Nov. 4, 2008 |
| 7446694 |
System for synchronization of multi-sensor data |
Nov. 4, 2008 |
| 7443518 |
Measuring instrument, in particular for transmission measurement in vacuum system |
Oct. 28, 2008 |
| 7440113 |
Littrow interferometer |
Oct. 21, 2008 |
| 7433048 |
Interferometer systems for measuring displacement and exposure systems using the same |
Oct. 7, 2008 |
| 7425697 |
Origin detection method for optical encoder |
Sep. 16, 2008 |
| 7417218 |
Triple grating optical encoder with light transmitting area in optical path |
Aug. 26, 2008 |
| 7414731 |
Microscope and interferometer thereof |
Aug. 19, 2008 |
| 7414730 |
High precision interferometer apparatus employing a grating beamsplitter |
Aug. 19, 2008 |
| 7405392 |
Optical rotary encoder |
Jul. 29, 2008 |
| 7405389 |
Dense multi-axis array for motion sensing |
Jul. 29, 2008 |
| 7394062 |
Displacement-measuring optical scale and optical encoder using same |
Jul. 1, 2008 |
| 7394550 |
Displacement detector |
Jul. 1, 2008 |
| 7391011 |
Optical encoder capable of detecting absolute position |
Jun. 24, 2008 |
| 7388181 |
Apparatus for adjusting applied voltage in display system using diffractive optical modulator |
Jun. 17, 2008 |
| 7385179 |
Optical encoder for measuring displacement |
Jun. 10, 2008 |
| 7369253 |
Systems and methods for measuring sample surface flatness of continuously moving samples |
May. 6, 2008 |
| 7358865 |
Optical encoder and apparatus using optical encoder |
Apr. 15, 2008 |
| 7348544 |
Optical encoder with discontinuous optical grating |
Mar. 25, 2008 |
| 7348529 |
Optical device and optical pickup device |
Mar. 25, 2008 |
| 7345273 |
Integrated optical encoder |
Mar. 18, 2008 |
| 7332709 |
Photoelectric encoder |
Feb. 19, 2008 |
| 7332711 |
Photoelectric encoder, scale therefor and method for manufacturing the same |
Feb. 19, 2008 |
| 7329858 |
Optical encoder and electronic equipment having same |
Feb. 12, 2008 |
| 7324212 |
Optical encoder having slanted optical detector elements for harmonic suppression |
Jan. 29, 2008 |
| 7319509 |
Attenuator for attenuating wavelengths unequal to a used wavelength |
Jan. 15, 2008 |
| RE39978 |
Scanning phase measuring method and system for an object at a vision station |
Jan. 1, 2008 |
| 7312437 |
Displacement sensor, method for detecting the optimal reference position, and method for judging stability of detecting the reference position of displacement sensor |
Dec. 25, 2007 |
| 7297935 |
Position-measuring device |
Nov. 20, 2007 |
| 7297971 |
Alignment systems and methods for lithographic systems |
Nov. 20, 2007 |
| 7291832 |
Optical encoders for position measurements |
Nov. 6, 2007 |
| 7289229 |
Optical displacement-measuring instrument |
Oct. 30, 2007 |
| 7274464 |
Position measuring device |
Sep. 25, 2007 |
| 7271920 |
Position-measuring device |
Sep. 18, 2007 |
| 7265338 |
Photoelectric encoder using an incoherent semiconductor light source |
Sep. 4, 2007 |
| 7265850 |
Fortified, compensated and uncompensated process-sensitive scatterometry targets |
Sep. 4, 2007 |
| 7247843 |
Long-range gap detection with interferometric sensitivity using spatial phase of interference patterns |
Jul. 24, 2007 |
| 7242484 |
Apparatus and methods for surface contour measurement |
Jul. 10, 2007 |
| 7238931 |
Displacement detection apparatus |
Jul. 3, 2007 |
| 7230722 |
Shadow moire using non-zero talbot distance |
Jun. 12, 2007 |
| 7223963 |
Optical encoder |
May. 29, 2007 |
| 7214930 |
Pulse generator |
May. 8, 2007 |
| 7211786 |
Reflective linear encoder having controlled detector to code strip distance |
May. 1, 2007 |
| 7196319 |
Position-measuring device |
Mar. 27, 2007 |
| 7186969 |
Optical configuration for imaging-type optical encoders |
Mar. 6, 2007 |
| 7184149 |
Methods and apparatus for reducing error in interferometric imaging measurements |
Feb. 27, 2007 |
| 7170047 |
Opto-electronic encoder with three-dimensional scales |
Jan. 30, 2007 |
| 7161139 |
Position-measuring system and method for operating a position-measuring system |
Jan. 9, 2007 |
| 7154609 |
Interferential position measuring arrangement |
Dec. 26, 2006 |
| 7154085 |
Object detection method and system |
Dec. 26, 2006 |
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