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Class Information
Number: 250/201.6
Name: Radiant energy > Photocells; circuits and apparatus > Photocell controls its own optical systems > Automatic focus control > Based on triangulation
Description: Subject matter in which the focusing is based on geometric triangulation using a baseline distance between at least two photocells.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7412159 |
Image pickup apparatus and defocus amount correction value calculation method |
Aug. 12, 2008 |
| 7324218 |
Method and device for distance measurement |
Jan. 29, 2008 |
| 7130027 |
Reflection-photometric analytical system |
Oct. 31, 2006 |
| 6897421 |
Optical inspection system having an internal rangefinder |
May. 24, 2005 |
| 6897422 |
Measuring configuration and method for measuring a critical dimension of at least one feature on a semiconductor wafer |
May. 24, 2005 |
| 6850325 |
Temperature compensated optical system based on a diffractive optical element |
Feb. 1, 2005 |
| 6844562 |
Distance measuring sensor and method for manufacturing the same |
Jan. 18, 2005 |
| 6833909 |
Device for optical distance measurement of distance over a large measuring range |
Dec. 21, 2004 |
| 6812479 |
Sample positioning method for surface optical diagnostics using video imaging |
Nov. 2, 2004 |
| 6768540 |
Phase difference detection method, phase difference detection apparatus, range finding apparatus and imaging apparatus |
Jul. 27, 2004 |
| 6763140 |
Method and apparatus for focusing a micro-imaging system onto a tilted or uneven sample to acquire images of the sample |
Jul. 13, 2004 |
| 6697146 |
Range finder for finding range by image realization |
Feb. 24, 2004 |
| 6650401 |
Optical distance sensor |
Nov. 18, 2003 |
| 6472652 |
Distance measuring apparatus |
Oct. 29, 2002 |
| 6456794 |
Distance-measuring apparatus |
Sep. 24, 2002 |
| 6433858 |
Autofocusing apparatus of a sighting telescope |
Aug. 13, 2002 |
| 6433857 |
Optical traingulation displacement sensor using a diffraction grating |
Aug. 13, 2002 |
| 6333782 |
Distance measuring apparatus |
Dec. 25, 2001 |
| 6295124 |
Rangefinder apparatus |
Sep. 25, 2001 |
| 6246467 |
Rangefinder apparatus |
Jun. 12, 2001 |
| 6122039 |
Method and apparatus to detect and report object displacement utilizing optical triangulation principles |
Sep. 19, 2000 |
| 6104476 |
Distance measuring apparatus and computer readable storage medium |
Aug. 15, 2000 |
| 6084658 |
Distance measuring apparatus |
Jul. 4, 2000 |
| 6046795 |
Distance measuring instrument |
Apr. 4, 2000 |
| 5999249 |
Position detecting element and range sensor |
Dec. 7, 1999 |
| 5969820 |
Surface position detecting system and exposure apparatus using the same |
Oct. 19, 1999 |
| 5963308 |
Distance measuring apparatus |
Oct. 5, 1999 |
| 5939705 |
Image information detection system and optical equipment using the system |
Aug. 17, 1999 |
| 5920382 |
Distance-measuring apparatus |
Jul. 6, 1999 |
| 5905567 |
Method and apparatus for optimizing sub-pixel resolution in a triangulation based distance measuring device |
May. 18, 1999 |
| 5905576 |
Optical displacement measurement device and optical displacement measurement system |
May. 18, 1999 |
| 5900611 |
Laser scanner with integral distance measurement system |
May. 4, 1999 |
| 5883379 |
Device and method capable of converting a position signal into a frequency signal using a photoelectric position sensitive detector |
Mar. 16, 1999 |
| 5870178 |
Distance measuring apparatus |
Feb. 9, 1999 |
| 5850282 |
Distance measuring device |
Dec. 15, 1998 |
| 5814808 |
Optical displacement measuring system using a triangulation including a processing of position signals in a time sharing manner |
Sep. 29, 1998 |
| 5808291 |
Image information detection system and optical equipment using the system |
Sep. 15, 1998 |
| 5808726 |
Distance measurement apparatus |
Sep. 15, 1998 |
| 5806020 |
Laser based speed and accident reconstruction measuring apparatus and method |
Sep. 8, 1998 |
| 5751406 |
Range finding apparatus |
May. 12, 1998 |
| 5742524 |
Distance measuring device |
Apr. 21, 1998 |
| 5739912 |
Object profile measuring method and apparatus |
Apr. 14, 1998 |
| 5719663 |
Range finder apparatus |
Feb. 17, 1998 |
| 5696705 |
System and method for reconstruction of the position of objects utilizing a signal transmitting and receiving distance determining device |
Dec. 9, 1997 |
| RE35652 |
Object distance detecting apparatus |
Nov. 4, 1997 |
| 5644385 |
Distance measuring device using position sensitive light detector |
Jul. 1, 1997 |
| 5640005 |
Active trigonometrical distance measuring apparatus with delay circuits |
Jun. 17, 1997 |
| 5627635 |
Method and apparatus for optimizing sub-pixel resolution in a triangulation based distance measuring device |
May. 6, 1997 |
| 5596386 |
Projection and reception type focus detecting apparatus |
Jan. 21, 1997 |
| 5589940 |
Apparatus for measuring the curvature of a surface using moveable reflecting and focusing elements |
Dec. 31, 1996 |
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