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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:
1 2 3

Patent Number Title Of Patent Date Issued
8670657 Ranging apparatus, lens system, and imaging apparatus Mar. 11, 2014
8654314 Rapidly deployable high power laser beam delivery system Feb. 18, 2014
8396655 Motor vehicle control system Mar. 12, 2013
8053712 Use of a photoelectric converted signal to inspect an objective lens driving device Nov. 8, 2011
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
6897422 Measuring configuration and method for measuring a critical dimension of at least one feature on a semiconductor wafer May. 24, 2005
6897421 Optical inspection system having an internal rangefinder 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
5808726 Distance measurement apparatus Sep. 15, 1998
5808291 Image information detection system and optical equipment using the system 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

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