31
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 ...


32
John M Pidhirny, Richard A Monroe, Michael J Pileski, Robert J Wood: Two-dimensional part reader having a focussing guide. Welch Allyn Data Collection, Wall Marjama Bilinski & Burr, April 4, 2000: US06045047 (217 worldwide citation)


An optical reader is suitable for reading 2-dimensional indicia. The optical reading device, that may include a bar code reader, comprises a guide whose length along the optical reader optical axis is such that when that guide contacts the part or equipment surrounding the indicia to be read, that i ...


33
Dominick Danna, Richard W Newman: Image sensor assembly. Welch Allyn, Bruns and Wall, January 1, 1985: US04491865 (217 worldwide citation)


A compact image sensor package for use in an endoscope or borescope in which a lens system, a solid state image sensor and a circuit board are mounted in tandem within a cylindrical sealed housing. The assembly is positioned within the viewing head of the instrument so that an image of a given targe ...


34
Thomas J Koziol, Michael A Ehrhart, Andrew Longacre Jr, Robert M Hussey: Optical reader having improved reprogramming features. Welch Allyn, Wall Marjama Bilinski & Burr, May 4, 1999: US05900613 (212 worldwide citation)


An optical reading apparatus adapted to scan and decode data in accordance with the enabled ones of the parameters stored in a parameter table. The reader is equipped with random access and erasable read only memories, and with a processor having a menuing program that allows the contents of the par ...


35
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 (212 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. ...


36
Timothy P Meier, Robert M Hussey, Charles P Barber: Indicia sensor system for optical reader. Welch Allyn Data Collection, Wall Marjama & Bilinski, July 1, 2003: US06585159 (211 worldwide citation)


In the present invention, the control unit of an optical reader analyzes image data being generated by the imaging element of the reader and changes the mode of operation of the reader if the image data indicates that machine readable indicia, such as a bar code symbol or a text character, is likely ...


37
Andrew Longacre Jr, Robert M Hussey: Bar code reader. Welch Allyn, Wall Marjama & Bilinski, March 3, 1998: US05723853 (207 worldwide citation)


A portable, hand-held, self-contained two-dimensional bar code reader adapted to the PDF417 symbology, includes a light source, a photodetector, and a decoder. The decoder comprises an 8 bit microcomputer, having an address space of 64K bytes, but actually using an 8K Byte SRAM for data storage, and ...


38
Eric D Schwartz, Edward B Hubben, Brian L Jovanovski, Vivian L Hunter, Melvin D McCall, Gerard F Beckhusen: Adjustable illumination system for a barcode scanner. Welch Allyn Data Collection, Wall Marjama & Bilinski, April 16, 2002: US06371374 (204 worldwide citation)


An apparatus for adjusting the position of a line of light in barcode space that includes a support frame having a rear housing containing a solid state imager and a pair of support arms extending forwardly from the front of the housing. An imaging lens is mounted between the arms for focusing an im ...


39
Andrew Longacre Jr: Image data binarization methods enabling optical reader to read fine print indicia. Welch Allyn Data Collection, George S Blasiak, Wall Marjama & Bilinski, June 10, 2003: US06575367 (202 worldwide citation)


In the present invention, a bar code reader captures an initial image map corresponding to a scene, then subjects the initial image map to an interpolation step wherein values for constructed pixels positionally intermediate pixel values of the initial image map are interpolated as a function of the ...


40
William H Havens, Charles M Hammond Jr: Integrated solid state light emitting and detecting array and apparatus employing said array. Welch Allyn, Harris Beach & Wilcox, June 7, 1994: US05319182 (200 worldwide citation)


There is provided an integrated semiconductor source-detector matrix in which solid state photonic diodes are configured as LEDs, disposed on a substrate and coupled to electronic circuits so that the diodes can be individually driven to emit light or to detect light as may be desired. Providing an ...



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