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Class Information
Number: 250/201.2
Name: Radiant energy > Photocells; circuits and apparatus > Photocell controls its own optical systems > Automatic focus control
Description: Subject matter in which at least one photocell is used to automatically adjust a lens to form a distinct image of an object on an imaging surface.

Sub-classes under this class:

Class Number Class Name Patents
250/201.4 Active autofocus 342
250/201.7 Based on contrast 189
250/201.8 Based on image shift 273
250/201.6 Based on triangulation 124
250/201.3 Of a microscope 403

Patents under this class:
1 2 3 4 5 6 7 8 9 10 11

Patent Number Title Of Patent Date Issued
8704150 Beam splitter module having a secondary beam splitter for providing orthogonal light beams and parallel light beams Apr. 22, 2014
8629382 Auto focus apparatus for detecting a focal point with a setting section for shifting an irradiation position outside an observation field of an imaging section Jan. 14, 2014
8604403 Auto-focusing apparatus and auto-focusing method using the same Dec. 10, 2013
8606426 Alignment and anti-drift mechanism Dec. 10, 2013
8598502 Motionless focus evaluation test station for electro-optic (EO) sensors Dec. 3, 2013
8581162 Weighting surface fit points based on focus peak uncertainty Nov. 12, 2013
8515291 Light receiving device and light receiving method Aug. 20, 2013
8507834 System and method for autofocusing an optical system through image spectral analysis Aug. 13, 2013
8507835 Auto-focusing method which uses a different focus determining method according to a type of corresponding focus graph, recording medium recording the method, and auto-focusing apparatus perfor Aug. 13, 2013
8508737 Spatial frequency optical measurement instrument and method Aug. 13, 2013
8494354 Focus adjusting apparatus and focus adjusting method Jul. 23, 2013
8494671 Grinding machine having the function of measuring distance Jul. 23, 2013
8487228 System for adjusting focus of a liquid lens in a machine vision system Jul. 16, 2013
8481903 Systems, methods, and apparatuses including a moveable optical component for detecting optical signals from a sample Jul. 9, 2013
8455804 Apparatus for adjusting optical mirrors Jun. 4, 2013
8436286 Imager module optical focus and assembly method May. 7, 2013
8420992 Microscope Apr. 16, 2013
8415599 Device for measuring the defects of an imaging instrument with two opto-electronic sensors Apr. 9, 2013
8384002 Multi-focal intraocular lens system and methods Feb. 26, 2013
8368971 Light scanning apparatus and scanning display apparatus Feb. 5, 2013
8350202 Method and apparatus for adjusting and testing an image sensor module Jan. 8, 2013
8346004 Apparatus and method for removing motion blur of image Jan. 1, 2013
8288700 Process and installation for the hot marking of translucent or transparent objects leaving a forming machine Oct. 16, 2012
8274026 Focus assist system and method Sep. 25, 2012
8258448 Autofocus device with contrast enhancement Sep. 4, 2012
8237097 Focus detecting apparatus and imaging apparatus having center position detection of micro lenses in micro lens array Aug. 7, 2012
8213784 Focus adjusting apparatus and focus adjusting method Jul. 3, 2012
8208144 Spatial frequency optical measurement instrument and method Jun. 26, 2012
8200081 Image capturing apparatus and method for controlling same Jun. 12, 2012
8179432 Predictive autofocusing May. 15, 2012
8174686 Focal position determining method, focal position determining apparatus, feeble light detecting apparatus and feeble light detecting method May. 8, 2012
8158917 Optical wavefront sensor and optical wavefront sensing method Apr. 17, 2012
8143562 Autofocus device enabling real-time follow-AF, method of controlling the same, and microscope system using the same Mar. 27, 2012
8135267 Autofocus imaging optical system and image pickup device Mar. 13, 2012
8106341 Laser annealing apparatus and method Jan. 31, 2012
8107806 Focus adjustment apparatus and focus adjustment method Jan. 31, 2012
8093540 Method of focus and automatic focusing apparatus and detecting module thereof Jan. 10, 2012
8022380 Laser irradiation method in which a distance between an irradiation object and an optical system is controlled by an autofocusing mechanism and method for manufacturing semiconductor device us Sep. 20, 2011
8023038 Camera module Sep. 20, 2011
7999245 Network centric directed energy systems Aug. 16, 2011
8000511 System for and method of focusing in automated microscope systems Aug. 16, 2011
7989745 Solid-state imaging device with focus detection and electronic camera with focus adjustment Aug. 2, 2011
7991280 Focus adjusting apparatus and focus adjusting method Aug. 2, 2011
7982169 Apparatus and method for detecting the focal position of an optical system and opthalmological treatment apparatus Jul. 19, 2011
7977616 Microscope equipped with automatic focusing mechanism and adjustment method thereof Jul. 12, 2011
7972018 Image projection system with auto-focus Jul. 5, 2011
7964833 Multi-focal intraocular lens system and methods Jun. 21, 2011
7960676 Image capture device to obtain an image with a bright subject, even when the background is dark, and recording medium Jun. 14, 2011
7956312 Optical disc device Jun. 7, 2011
7957634 Circuit for calibrating focus position of optical module and calibrating method thereof Jun. 7, 2011

1 2 3 4 5 6 7 8 9 10 11

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