1
Bradley S Carlson, Eugene Joseph, Kefie Lu: Automatic focusing system for imaging-based bar code reader. Symbol Technologies, Tarolli Sundheim Covell & Tummino, December 4, 2007: US07303131 (102 worldwide citation)

An automatic focusing system for an imaging-based bar code reader. The automatic focusing system employs a two step process for moving a lens of an imaging system along its path of travel such that a sharp image of a target bar code is projected or focused onto an imaging system pixel array. The fir ...


2
Seiji Morita, Mitsuyoshi Sato, Atsushi Uemoto: Automatic focusing system for scanning electron microscope equipped with laser defect detection function. Seiko Instruments, Hogan & Hogan, September 16, 2003: US06621082 (101 worldwide citation)

A scanning electron microscope equipped with a laser defect detection function has an automatic focusing function that performs the steps of: obtaining a deviation (offset) amount between focal positions of an optical microscope and a scanning electron microscope; detecting a defect by a laser dark- ...


3
Hiroshi Takemoto, Noboru Murayama, Kei Sato: Focusing system and image input apparatus having automatic focusing system which uses digital processing. Ricoh Company, Mason Fenwick & Lawrence, November 12, 1991: US05065246 (50 worldwide citation)

An automatic focusing system includes an image pickup system for picking up an image and for outputting an image signal, a compression part for digitally compressing the image signal from the image pickup system and for outputting a compressed image signal, an operation part for obtaining focal info ...


4
Curt H Chadwick, Art M Shulenberger, John S Taylor, Richard R Simmons: Automatic focusing system for a microscope. KLA Instruments Corporation, Hamrick Hoffman Guillot & Kazubowski, January 27, 1987: US04639587 (49 worldwide citation)

An automatic microscope focusing system including a light source 44, a dual channel fiber optics bundle 56 and 58, chopper means 54 for alternately admitting light to the channels, a reticle 66 and associated optics to cast alternating images onto the surface of an inspected article W, return masks ...


5
Kenji Sano, Takesuke Maruyama, Hironobu Satoh, Masaharu Deguchi, Toshio Murakami: Automatic focusing system. Hitachi, Antonelli Terry & Wands, April 24, 1990: US04920420 (41 worldwide citation)

There is provided an automatic focusing system which is used in a video camera or the like. A master lens is finely vibrated and moved by using a moving mechanism consisting of a stepping motor and a lead screw. A speed control circuit to set a moving speed of the master lens is provided. The moving ...


6
Robert W Bogle, Gary Gero, Stephen L Wald: Motion picture camera automatic focusing system. Baker Maxham & Jester, July 22, 1986: US04601557 (33 worldwide citation)

A focusing system for a variable focus lens of a motion picture camera includes a pulse modulator and a microwave transmitter mounted on a camera frame for generating a high frequency pulsed signal which is transmitted to a selected target which carries a reactive signal generator that is responsive ...


7
John C Bouton, Melvin E Partin, Robert C Hilghman: Automatic focusing system. Geometric Data Corporation, Caesar Rivise Bernstein & Cohen, August 30, 1977: US04045772 (31 worldwide citation)

A white blood cell classification system is provided for detecting and classifying white blood cells in a peripheral blood smear. The system includes optical scanning means for scanning the blood smear, a microscope for directing the optical scanning means on the blood smear and means responsive to ...


8
Toshio Murakami, Kentaro Hanma: Automatic focusing system for video cameras. Hitachi, Antonelli Terry & Wands, July 23, 1985: US04531158 (30 worldwide citation)

An automatic focusing system for a video camera carries out automatic focusing on the basis of a focus signal extracted from a high-frequency component of a video signal. The automatic focusing system comprises at least one of picture-contents change detecting means for detecting a change, if any, b ...


9
David C Burgess, Clive A Stubbings, Jacques Ginestet, Ilya Ravkin: Automatic focusing system using focal length-changing element. Applied Imaging International, Harrison & Egbert, October 19, 1993: US05254845 (29 worldwide citation)

In an automatic focusing system an element (2) is inserted in the path of a beam of light (3) directed towards a sensor array. The element comprises a transparent material or predetermined reflective index, the element presenting a first region (4) of a first thickness and another region (5) of a gr ...


10
Kenneth L Hendrickson, Robert F Johnston: Automatic focusing system. James B Blanchard, Jerold A Jacover, June 28, 1977: US04032934 (28 worldwide citation)

This invention relates to photographic apparatus having means for automatically moving a lens along an axis for properly focusing on an object. The apparatus includes a light emitter for transmitting a train of light signals toward the object at a constant angle relative to the axis, and a pair of m ...