Laser scanners with extended working range

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element

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Details

235462, 235472, 359221, 359721, 359216, G02B 2610

Patent

active

050804561

ABSTRACT:
A bar code scanner is disclosed employing a laser source and scan mirror for generating a light beam for scanning a bar code symbol or the like. The working range for distance between the scanner and the symbol is extended by placing an optical element in the path between the laser source and the scan mirror. This optical element may be a figure of rotation such as an axicon. A slit may be positioned downstream of the axicon to block the characteristic concentric rings produced in the beam in areas perpendicular to the scan line.

REFERENCES:
patent: 4251798 (1981-02-01), Swartz et al.
patent: 4257669 (1981-03-01), Scorteanu et al.
patent: 4387297 (1983-06-01), Swartz et al.
patent: 4409470 (1983-10-01), Shepard et al.
patent: 4630274 (1986-12-01), Schafer
patent: 4758717 (1988-07-01), Shepard et al.
patent: 4760248 (1988-07-01), Swartz et al.
McLeod, "The Axicon: A New Type of Optical Element", Journal of the Optical Society of America, Aug. 1954, pp. 592-597.
Edmonds, "Imaging Properties of a Conic Axicon", Applied Optics, Aug. 1974, pp. 1762-1764.
Schafer, "On Some Properties Axicons", Applied Physics B, 1986, pp. 1-8.
Lit et al., "Focal Depth of a Transmitting Axicon", Journal of the Optical Society of America, Apr. 1973, pp. 445-449.
Rioux et al., "Linear, Annular, and Radial Focusing with Axicons and Applications to Laser Machining", Applied Optics, 15 May 1978, pp. 1532-1536.
Hausler et al., "Light Sectioning with Large Depth and High Resolution", Applied Optics, 15 Dec. 1988, pp. 5165-5169.
Rioux et al., "Design of a Large Depth of View Three-Dimensional Camera for Robot Vision", Optical Engineering, Dec. 1987, pp. 1245-1250.
Durnin, "Exact Solutions for Nondiffracting Beams, I, Scalar Theory", J. Opt. Soc. Am. A., Apr. 1987, pp. 651-654.
Indebetouw et al., "Imaging with Fresnel Zone Pupil Masks: Extended Depth of Field", Applied Optics, 1 Dec. 1984, pp. 4299-4302.
McCrickerd, "Coherent Processing and Depth of Focus of Annular Aperture Imagery", Applied Optics, Oct. 1971, pp. 2226-2230.
Pieper et al., "Resolution-Dependent Depth of Focus for an Incoherent Imaging System", Applied Optics, 15 May 1988, pp. 2040-2047.
Durnin et al., "Diffraction-Free Beams", Physical Review Letters, 13 Apr. 1987, pp. 1499-1501.

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