Variable focus optical system for data reading

Details Variable focus optical system for data reading Variable focus optical system for data reading

1993-12-07

1995-12-26

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250568, 235472, G06K 710

Patent

active

054790115

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: 3928759 (1975-12-01), Sansone
patent: 3995166 (1976-11-01), Hobart et al.
patent: 4333006 (1982-06-01), Gorin et al.
patent: 4335302 (1982-06-01), Robillard
patent: 4367009 (1983-01-01), Suzki
patent: 4368947 (1983-01-01), Yoshinaga et al.
patent: 4407509 (1983-10-01), Piller
patent: 4414468 (1983-11-01), Lauer et al.
patent: 4415224 (1983-11-01), Dickson
patent: 4560862 (1985-12-01), Eastman et al.
patent: 4575625 (1986-03-01), Knowles
patent: 4576441 (1986-03-01), Kubick
patent: 4591242 (1986-05-01), Broockman et al.
patent: 4675531 (1987-06-01), Clark et al.
patent: 4678288 (1987-07-01), Lonsdale et al.
patent: 4721362 (1988-01-01), Brody et al.
patent: 4749316 (1988-05-01), Dickson
patent: 4758070 (1988-07-01), Nishimoto
patent: 4786798 (1988-11-01), Lonsdale
patent: 4799164 (1989-01-01), Hellekson et al.
patent: 4808804 (1989-02-01), Krichever et al.
patent: 4816660 (1989-03-01), Swartz et al.
patent: 4818886 (1989-04-01), Drucker
patent: 4820911 (1989-04-01), Arackellian et al.
patent: 4833314 (1989-05-01), Pepper et al.
patent: 4843222 (1989-06-01), Hochgraf
patent: 4861975 (1989-07-01), Kino et al.
patent: 4916318 (1990-04-01), Iima
patent: 4939355 (1990-07-01), Rando
patent: 4946234 (1990-08-01), Sasada et al.
patent: 5051567 (1991-09-01), Tedesco
patent: 5073702 (1991-12-01), Schuhmacher
patent: 5080456 (1992-01-01), Katz et al.
patent: 5081364 (1992-01-01), Wike, Jr.
patent: 5170277 (1992-12-01), Bard et al.
patent: 5200597 (1993-04-01), Eastman et al.
patent: 5208701 (1993-05-01), Maeda
patent: 5210398 (1993-05-01), Metlitsky
patent: 5233170 (1993-08-01), Metlitsky et al.
patent: 5386105 (1995-01-01), Quinn et al.
CX-7051 Reader/Printer Terminal Service Manual, CX Systems, Seattle, Wash.; pp. i, ii, 1-2, 20-23, 32-33 (May 1, 1982).
MS-1000 Technical Manual, Microscan, Seattle, Wash. (approx. 1982).
MS-1000 brochure for High Speed Miniature Laser Scanner, Microscan, Seattle, Wash. (Nov. 1982).
IBM Technical Disclosure Bulletin, vol. 24, No. 9 (Feb., 1982) entitled "Time Multiplexed Two-Beam Scanner" by E. C. Broockman.

Affiliated with

Also associated with

Rating

Variable focus optical system for data reading does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable focus optical system for data reading, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable focus optical system for data reading will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1370526