Richard Scott Fleming

US Patent:

7075565, Jul 11, 2006

Filed:

Jun 14, 2000

Appl. No.:

09/593352

Inventors:

Douglas W. Raymond - Orinda CA, US
Richard D. Fleming - Walnut Creek CA, US

Assignee:

Landrex Technologies Co., Ltd. - Taipei-Hsien

International Classification:

H04N 7/18

US Classification:

348126, 348 87, 348131

Abstract:

An automated optical inspection system includes a plurality of asynchronously triggerable cameras for providing image data of an object, such as a printed circuit board. The circuit board is divided into fields of view that are to be imaged in one or more cameras in one or more lighting modes. Each location on the board can be imaged by each camera in a plurality of lighting modes in a single pass across the board. The image data for each of the cameras can be concurrently transferred directly to main memory for opportunistic analysis by the main computer. The system allows the full bandwidth of the cameras to be utilized for reducing the inspection time of the board.

US Patent:

7233871, Jun 19, 2007

Filed:

Mar 10, 2003

Appl. No.:

10/385079

Inventors:

Douglas W. Raymond - Orinda CA, US
Richard D. Fleming - Walnut Creek CA, US
John Haddon - Berkeley CA, US
Dominic F. Haigh - San Francisco CA, US

Assignee:

Landrex Technologies Co., Ltd. - Taipei

International Classification:

G01N 37/00
G06F 19/00

US Classification:

702 83, 382149

Abstract:

A technique for developing an inspection program for a circuit board to be run on an AOI system includes determining a characteristic, such as average gray level, of each window of the circuit board. The positions of the windows are varied slightly to simulate expected errors in the placement of the windows relative to the circuit board. After varying the positions of the windows, the characteristic of each window is determined again. Different values of the characteristic corresponding to slightly different positions are compared for each window. Values that substantially change for a window indicate a strong sensitivity to position. These windows may be reported to a programmer for corrective action.