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Class Information
Number: 250/559.12
Name: Radiant energy > Photocells; circuits and apparatus > With circuit for evaluating a web, strand, strip, or sheet > Beam interruption or shadow
Description: Subject matter wherein some characteristic of an opaque material is determined by measuring the proportion of the amount of light detected by a photocell (when the opaque material is placed in the light path between the photocell and a light source) to the amount of light detected by the photocell from the source in the complete absence of the opaque material.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7454935 |
Safety method and optoelectronic sensor |
Nov. 25, 2008 |
| 7448242 |
Method for securing a machine tool and opto-electronic sensor for carrying out such a method |
Nov. 11, 2008 |
| 7361920 |
Substrate processing apparatus and transfer positioning method thereof |
Apr. 22, 2008 |
| 7340930 |
Method for securing a machine tool and opto-electronic sensor for carrying out such a method |
Mar. 11, 2008 |
| 7312433 |
Measuring device and method for detecting objects interrupting a beam of radiation |
Dec. 25, 2007 |
| 7242486 |
Note skew detector |
Jul. 10, 2007 |
| 7227163 |
Product inspection system and a method for implementing same |
Jun. 5, 2007 |
| 7205528 |
Method of and apparatus for detecting coordinate position having three scanning modes |
Apr. 17, 2007 |
| 7187457 |
Apparatus for measuring sizes of articles |
Mar. 6, 2007 |
| 7129507 |
Chip mis-position detection method |
Oct. 31, 2006 |
| 7126144 |
Method for the contactless measurement of an object |
Oct. 24, 2006 |
| 7126145 |
Frame transfer prober |
Oct. 24, 2006 |
| 7080583 |
Method and apparatus for presetting specimens in a cutting device |
Jul. 25, 2006 |
| 7067833 |
Device for wrapping bodies, in particular bales of harvested material |
Jun. 27, 2006 |
| 6927386 |
Optical position detecting device and recording medium including an operational defect judgment |
Aug. 9, 2005 |
| 6906307 |
Fail safe one wire interface for optical emitter-detector photo-eye systems with diagnostics |
Jun. 14, 2005 |
| 6900451 |
Mapping sensor system for detecting positions of flat objects |
May. 31, 2005 |
| 6891181 |
Opto-electronic transmissive edge location sensor |
May. 10, 2005 |
| 6878953 |
Optical measuring apparatus for measuring objects on machines |
Apr. 12, 2005 |
| 6844539 |
Touch location by retroflected scanned optical beams |
Jan. 18, 2005 |
| 6784415 |
Method of installing a multi-beam photoelectric safeguard system and method of adjusting its optical axes |
Aug. 31, 2004 |
| 6762426 |
Threaded fastener inspection method |
Jul. 13, 2004 |
| 6737663 |
Apparatus and method for detecting tilt angle of a wafer platform |
May. 18, 2004 |
| 6677574 |
Protective device for machines such as bending presses, cutting machines, punching machines or the like |
Jan. 13, 2004 |
| 6635894 |
Optical measuring apparatus for measuring objects on machines |
Oct. 21, 2003 |
| 6614014 |
Method for selecting the operation of an optical detector and multimode optical detector |
Sep. 2, 2003 |
| 6573522 |
Locator pin integrated with sensor for detecting semiconductor substrate carrier |
Jun. 3, 2003 |
| 6528808 |
Transmitting photoelectric sensor array |
Mar. 4, 2003 |
| 6441386 |
Apparatus and method for mounting electronic component |
Aug. 27, 2002 |
| 6429418 |
Imaging system |
Aug. 6, 2002 |
| 6403951 |
Detection module and positioning, holding or gripping device for a piece of automobile body work |
Jun. 11, 2002 |
| 6348696 |
Method and device for detecting the position of the edge of a moving material web |
Feb. 19, 2002 |
| 6346988 |
Laser position array optical measuring system and method |
Feb. 12, 2002 |
| 6321604 |
Electro-optical float position indicator |
Nov. 27, 2001 |
| 6323948 |
Light sensor for web-guiding apparatus |
Nov. 27, 2001 |
| 6243011 |
Optoelectric safety system for a folding press |
Jun. 5, 2001 |
| 6242755 |
Method and device for the contactless measuring of strand-like textile material |
Jun. 5, 2001 |
| 6236327 |
Wafer-fetching sensing device for wafer storage apparatus |
May. 22, 2001 |
| 6177682 |
Inspection of ball grid arrays (BGA) by using shadow images of the solder balls |
Jan. 23, 2001 |
| 6175419 |
Light sensor for web-guiding apparatus |
Jan. 16, 2001 |
| 6169490 |
Outlet port protective device for stocking unit |
Jan. 2, 2001 |
| 6055329 |
High speed opto-electronic gage and method for gaging |
Apr. 25, 2000 |
| 6038836 |
Process and apparatus for the optoelectronic monitoring of packaging material |
Mar. 21, 2000 |
| 5960129 |
Method and apparatus for detecting liquid and gas segment flow through a tube |
Sep. 28, 1999 |
| 5952670 |
Anti-wafer breakage detection system |
Sep. 14, 1999 |
| 5932888 |
Web or sheet edge position measurement process and device |
Aug. 3, 1999 |
| 5875419 |
System and method for determining yarn hairiness |
Feb. 23, 1999 |
| 5805291 |
Traversing thickness measurement apparatus and related method |
Sep. 8, 1998 |
| 5804830 |
Three-dimensional non-contact scanning apparatus and method using at least one circular, planar array of a plurality of radiant energy sensors, and a rotating energy source |
Sep. 8, 1998 |
| 5796486 |
Apparatus method for determining the presence or absence of a wafer on a wafer holder |
Aug. 18, 1998 |
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