Optical scanner having multiple, simultaneous scan lines with di

Details Optical scanner having multiple, simultaneous scan lines with di Optical scanner having multiple, simultaneous scan lines with di

1984-02-13

1986-05-27

Arnold, Bruce Y.

Registers

Coded record sensors

Particular sensor structure

350 61, 235457, G02B 2610

Patent

active

045912424

ABSTRACT:
An optical scanner uses frequency modulation and detection techniques to produce and utilize multiple, simultaneous scan patterns in which corresponding scan lines have different focal lengths. Two or more solid state lasers are modulated at unique frequencies. The frequency modulated output beams pass through different combinations of focusing lenses and are deflected by a single beam deflecting apparatus. Light reflected from any scanned object is detected. The resulting multi-frequency signal is applied to a plurality of bandpass filters to separate the returned signal into a plurality of separately decodable signals.

REFERENCES:
patent: 4333006 (1982-06-01), Gorin et al.
patent: 4474422 (1984-10-01), Kitamura
Broockman, "Time Multiplexed Two-Beam Scanner" IBM Tech. Disc. Bulletin, vol. 24, No. 9, Feb. 1982, pp. 4841-4843.
Dickson et al., "Dual Laser Scanner for Enhancing Readability of Specularly Reflecting Labels", IBM Tech. Disc. Bull., vol. 25, No. 12, May 1983, pp. 6721-6722.

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