Registers – Coded record sensors – Particular sensor structure
Patent
1992-04-06
1993-11-02
LaRoche, Eugene R.
Registers
Coded record sensors
Particular sensor structure
235455, 235470, 2504941, G06K 714, G06K 922
Patent
active
052586057
ABSTRACT:
A bar code scanner employs an electronic means for causing the light beam to scan a bar code symbol, rather than using a mechanical device to generate the scan. A linear array of light sources, activated one at a time in a regular sequence, may be imaged upon the bar code symbol to simulate a scanned beam. Instead of a single linear array of light sources, a multiple-line array may be employed, producing multiple scan lines. The multiple scan lines may be activated in sequence, or activated simultaneously (time-division or frequency-division multiplexed. The multiple scan lines can provide signal enhancement, noise reduction or fault correction if directed to the same bar code pattern. Multiple scan lines may be generated using a single light source and a beam splitter, with mechanical scanning, as well as by the sequentially-activated light suorces. Multiple simultaneous scan lines may be employed to generate a raster scan at lower mechanical scan frequency. In another embodiment, a tunable laser may be employed to provide a scan without moving parts; a laser beam from the tunable laser is reflected from a diffraction grating that produces an angular deviation dependent upon the wavelength of the laser output. As the frequency of the tunable laser is varied in some selected pattern, the laser beam will scan accordingly.
REFERENCES:
patent: 3812325 (1974-05-01), Schmidt
patent: 3819910 (1974-06-01), Scantlin
patent: 3946205 (1976-03-01), Melugin et al.
patent: 4040740 (1977-08-01), Handtmam et al.
patent: 4057784 (1977-11-01), Tafoya
patent: 4135663 (1979-01-01), Nojiri et al.
patent: 4195772 (1980-04-01), Nishimura
patent: 4217487 (1980-08-01), Kjeer
patent: 4251798 (1981-02-01), Swartz et al.
patent: 4315245 (1982-02-01), Nakahara et al.
patent: 4369361 (1983-01-01), Swartz et al.
patent: 4387297 (1983-06-01), Swartz et al.
patent: 4409470 (1983-10-01), Shepard et al.
patent: 4460120 (1984-07-01), Shepard et al.
patent: 4473746 (1984-09-01), Edmonds
patent: 4481667 (1984-11-01), Price et al.
patent: 4496831 (1985-01-01), Swartz et al.
patent: 4548463 (1985-10-01), Cato et al.
patent: 4591242 (1986-05-01), Broockman et al.
patent: 4593186 (1986-06-01), Swartz et al.
patent: 4605846 (1986-08-01), Duret et al.
patent: 4629876 (1986-12-01), Kubota et al.
patent: 4673805 (1987-06-01), Shepard et al.
patent: 4698797 (1987-10-01), Komatsu
patent: 4734566 (1988-03-01), Senda et al.
patent: 4736095 (1988-04-01), Shepard et al.
patent: 4743773 (1988-05-01), Katana et al.
patent: 4758717 (1988-07-01), Shepard et al.
patent: 4760248 (1988-07-01), Swartz et al.
patent: 4806742 (1989-02-01), Swartz et al.
patent: 4813034 (1989-03-01), Mashimo
patent: 4818856 (1989-04-01), Matsushima et al.
patent: 4897532 (1990-01-01), Swartz et al.
patent: 4900907 (1990-02-01), Matsushima et al.
patent: 4933538 (1990-06-01), Heiman et al.
Dickson et al, Scanner With Tandem Stationary Holographic Discs, Jan. 1981.
Sekii et al, "Semiconductor Laser Digital Scanner", SPIE Proceedings vol. 1028, Conf. on Scanning Imaging Sep. 21-23, '88.
Fujimoto et al, "Semiconductor Laser Digital Scanner", Mar. 1990, Optical Engineering, vol. 29, No. 3, pp. 230-232.
Gousgounis Dean
Katz Joseph
Marom Emanuel
Metlitsky Boris
Glembocki Christopher R.
LaRoche Eugene R.
Symbol Technologies Inc.
LandOfFree
Scan generators for bar code reader using linear array of lasers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Scan generators for bar code reader using linear array of lasers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scan generators for bar code reader using linear array of lasers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1759278