Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1990-04-17
1991-03-19
Arnold, Bruce Y.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
250236, 235467, G02B 2610
Patent
active
050005294
ABSTRACT:
An optical scanner is disclosed wherein coded bars are scanned by a laser beam to effect reading of a bar code of the coded bars. The optical scanner includes a rotary polygon mirror having a plurality of reflecting portions provided thereon around an axis of rotation thereof for reflecting a laser beam from a light source toward coded bars. Each reflecting portion of the rotary polygon mirror has a plurality of reflecting faces having different inclination angles from each other with respect to the axis of rotation such that an inclination angle of a line of intersection between adjacent reflecting faces of each reflecting portion with respect to the axis of rotation is different from an inclination angle of a line of intersection between adjacent reflecting faces of each of adjacent ones of the reflecting portions on the opposite sides of the reflecting portion with respect to the axis of rotation. Where the rotary polygon mirror of the construction is used, a scanning pattern which is constituted from scanning lines of various directions can be obtained from the rotary polygon mirror. The optical scanner can thus be reduced in overall size and production cost of the device.
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patent: 4413878 (1983-11-01), Lettington
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patent: 4799164 (1989-01-01), Hellekson et al.
patent: 4938551 (1990-07-01), Matsumoto
Katoh Hiroaki
Kitamura Nobuyuki
Miyazaki Toshimasa
Murakawa Yoshitaka
Arnold Bruce Y.
Ben Loha
Fujitsu Limited
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