G - Physics – 06 – K
Patent
G - Physics
06
K
88/96
G06K 7/10 (2006.01)
Patent
CA 1249148
LIGHT-BEAM SCANNING APPARATUS ABSTRACT OF THE DISCLOSURE Light-beam scanning apparatus mainly used for a bar-code reader in a point-of-sale system to identify sold articles. The apparatus comprises a light-beam emitting device, a hologram disk having a plurality of hologram segments with different diffraction charac- teristics mounted along its circumference and being rotated at a predetermined speed, and a deflecting device for directing the emitted light beam from the light-beam emitting device to one side of the hologram disk at a first direction. The scanning apparatus further comprises a first mirror group including a plurality of mirrors placed at a second direction corresponding to the other side of the hologram disk, each of which mirrors is arranged to receive a diffracted light beam from a corresponding hologram segment, and a second mirror group including a plurality of mirrors, each of which mirrors is placed to receive a light beam reflected by a corresponding mirror of the first mirror group and to reflect the incident light beam to a predetermined space positioned in the first direction where an article attached with a bar-code label is moved. In the apparatus, a light path from the other side of the hologram disk to the predetermined space has a predetermined length to form a predetermined scanning light pattern in the space.
450863
Ikeda Hiroyuki
Inagaki Takefumi
Ishii Mitsuharu
Sebata Ichiro
Watanuki Hiroshi
Fujitsu Limited
Mcfadden Fincham
LandOfFree
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