Robert C Gardiner, Charles P Barber, Eric Coleman, Michael Ehrhart, Colleen P Gannon, Robert J Hennick, William H Havens, Vivian L Hunter, Melvin D McCall, Thomas Ruhlman: Optical reader comprising multiple color illumination. Hand Held Products, Wall Marjama & Bilinski, December 21, 2004: US06832725 (477 worldwide citation)

An imaging module in one embodiment includes at least one multiple color emitting light source comprising a plurality of different colored LED dies each independently driveable so that the overall color emitted by the light source can be controlled and varied. The multiple color emitting light sourc ...

William H Havens, John M Pidhirny, Robert J Hennick: Optical reader having illumination assembly including improved aiming pattern generator. Wall Marjama Bilinski & Burr, May 9, 2000: US06060722 (310 worldwide citation)

An optical assembly for use with optoelectronic readers. An imaging optical assembly having an imaging optical axis forms an image of a two-dimensional region on an optoelectronic imaging device. An aiming pattern generator including at least a point-like aiming light source and an interferometric p ...

Rob Hussey, William H Havens, Robert J Wood Sr: Optical reader having improved interactive image sensing and control circuitry. Welch Allyn, Wall Marjama & Bilinski, July 21, 1998: US05784102 (278 worldwide citation)

A hand-held optical reader for reading 2D bar code symbols. The reader includes an illuminating system for illuminating the symbol and an optical system for focusing an image thereof on a 2D image sensor. The image sensor is of the type which allows its imaging parameters, such as exposure, to be co ...

William H Havens, Charles M Hammond Jr, Robert J Hennick, Robert C Hinkley, Robert J Wood Sr, Tanya A Onori, Thomas W Karpen: Imaging and illumination optics assembly. Welch Allyn, Wall Marjama & Billinski, July 14, 1998: US05780834 (271 worldwide citation)

A low profile optical unit for use in a 2D bar code reader. A vertically disposed light redirecting panel having contoured reflective openings therein is mounted in the front of the unit and an LED behind the panel. Light emitting diodes for illuminating a target are mounted on the LED board behind ...

Charles M Hammond Jr, William H Havens: Illuminating assembly for use with bar code readers. Welch Allyn, Wall Marjama & Bilinski, March 3, 1998: US05723868 (253 worldwide citation)

An array of reflectors is arranged to approximately match the arrangement of a two-dimensional array of LEDs such as used in a 2-D bar code scanner. Each reflector has at least one reflecting wall for reflecting light from a respective LED, thus increasing the amount of LED light illuminating the ta ...

Andrew Longacre Jr, Charles M Hammond Jr, William H Havens, John M Pidhirny: Method of programmable digitization and bar code scanning apparatus employing same. Welch Allyn, Harris Beach & Wilcox, February 15, 1994: US05286960 (236 worldwide citation)

A method and apparatus are provided for detecting bar-space and space-bar transitions in a bar code symbol. A sequence of sparsely sampled analog signals from a photodetector in a bar code scanner is representative of the reflectance pattern of a symbol.

Ynjiun P Wang, Kevin Ahearn, Stephen P Deloge, Michael A Ehrhart, William H Havens, Robert M Hussey, Thomas J Koziol, Jianhua Li, Jingquan Li, James Montoro, Sven M A Powilleit: Indicia reading terminal having spatial measurement functionality. Hand Held Products, Marjama Muldoon Blasiak & Sullivan, June 1, 2010: US07726575 (225 worldwide citation)

There is provided in one embodiment an indicia reading terminal that can execute a spatial measurement mode of operation in which the indicia reading terminal can determine a dimension of an article in a field of view of the indicia reading terminal and/or determine other spatial information. In det ...

William H Havens, Charles M Hammond: Method and apparatus for extending operating range of bar code scanner. Welch Allyn Data Collection, Wall Marjama & Bilinski, April 15, 2003: US06547139 (224 worldwide citation)

The operating depth of field for a bar code scanner, preferably a laser scanner, is increased by placing a cubic phase mask (CPM) in the scanning beam. The masked beam is then scanned and reflected off a bar code and received by a photodetector. The received signal is then processed to recover the o ...

Charles M Hammond Jr, Andrew Longacre Jr, William H Havens: Analog reconstruction circuit and bar code reading apparatus employing same. Welch Allyn, Harris Beach & Wilcox, March 15, 1994: US05294783 (218 worldwide citation)

A bar code detection circuit accepts as input the discretized analog output of a CCD array, and performs piecewise linear reconstruction to produces a continuous polylinear output signal. In the region of a bar/space transition, the output signal is a close approximation of the reflectance function ...

William H Havens, Harry R McKinley, Charles M Hammond Jr, Joseph J Morabito, Jeffrey B Powers: Optical assembly and apparatus employing same using an aspherical lens and an aperture stop. Welch Allyn, Harris Beach & Wilcox, March 1, 1994: US05291008 (213 worldwide citation)

There is disclosed an simplified apparatus that enables optical scanners to achieve minimum field curvature and at the same time provide uniformly distributed light on an image sensor. A single element lens, preferably an aspherical lens made of a plastic material is combined with an aperture stop. ...