Optical scanner with large depth in focus

Details Optical scanner with large depth in focus Optical scanner with large depth in focus

G - Physics

06

K

88/94.5, 88/96.8

G06K 7/10 (2006.01) G02B 27/40 (2006.01)

Patent

CA 1050313

OPTICAL SCANNER WITH LARGE DEPTH OF FOCUS Abstract of the Disclosure An optical scanner for focusing an optical beam on a surface, which may be at any of a range of distances, utilizes a plurality of optical plates. The plates, which are of different thicknesses, are selectively insertable in the optical beam path to focus the beam at the surface according to the particular distance thereof. The invention herein described was made in the course of or under a contract with the United States Postal Service.

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