Optical system for data reading having wide range of focus

Details Optical system for data reading having wide range of focus Optical system for data reading having wide range of focus

1995-06-07

1997-06-24

Allen, Stephone

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250568, 359370, 235472, G06K 710

Patent

active

056419589

ABSTRACT:
An optical system and method for data reading in which a light source generates an optical beam directed toward an object to be read and a variable aperture mechanism positioned in the outgoing light path establishes at least two separate focal planes. The variable aperture device may comprise a variable aperture system in which the size of the aperture is selectively varied about a range within the diffractive limit of the light beam. A preferred aperture mechanism is a liquid crystal aperture with one or more aperture regions which are selectively or consecutively activated. The optical system therefore establishes two or more separate waist locations from a single light source resulting in greater depth of field or multiple depths of field.

REFERENCES:
patent: 2811081 (1957-10-01), Praeger
patent: 3004470 (1961-10-01), Ruhle
patent: 4333006 (1982-06-01), Gorin et al.
patent: 4335302 (1982-06-01), Robillard
patent: 4357009 (1982-11-01), Suzki
patent: 4407569 (1983-10-01), Piller et al.
patent: 4415224 (1983-11-01), Dickson
patent: 4510383 (1985-04-01), Ruppender
patent: 4560862 (1985-12-01), Eastman et al.
patent: 4576441 (1986-03-01), Kubick
patent: 4675531 (1987-06-01), Clark et al.
patent: 4748316 (1988-05-01), Dickson
patent: 4758070 (1988-07-01), Nishimoto
patent: 4808804 (1989-02-01), Krichever et al.
patent: 4818886 (1989-04-01), Drucker
patent: 4831275 (1989-05-01), Drucker
patent: 4833314 (1989-05-01), Pepper et al.
patent: 4843222 (1989-06-01), Hochgraf
patent: 4946234 (1990-08-01), Sasada et al.
patent: 4947413 (1990-08-01), Jewell et al.
patent: 5016981 (1991-05-01), Peppers et al.
patent: 5080456 (1992-01-01), Katz et al.
patent: 5111343 (1992-05-01), Harrigan
patent: 5121378 (1992-06-01), Hirose et al.
patent: 5170277 (1992-12-01), Bard et al.
patent: 5200597 (1993-04-01), Eastmann et al.
patent: 5208701 (1993-05-01), Maeda
patent: 5210398 (1993-05-01), Metlitsky
patent: 5233170 (1993-08-01), Metlitsky et al.
patent: 5347121 (1994-09-01), Rudeen
patent: 5386105 (1995-01-01), Quinn et al.
patent: 5438187 (1995-08-01), Reddersen et al.
patent: 5479011 (1995-12-01), Rudeen et al.
CX-7051 Reader/Printer Terminal Service Manual, CX Systems, Seattle, WA; pp. i, ii, 1-2, 20-23, 32-33 (May 1, 1982).
MS-1000 Technical Manual, MICROSCAN, Seattle, WA (approx. 1982).
MS-1000 brochure for High Speed Miniature Laser Scanner, MICROSCAN, Seattle, WA (Nov. 1982).

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