公开(公告)号：JPH05182009A

公开(公告)日：1993-07-23

申请号：JP14719092

申请日：1992-06-08

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： POORU DOBUOOKISU ,  DEIBUITSUDO PII GOOREN ,  GUREN ESU SUPITSUTSU ,  DANIERU AARU MATSUGURIIN

IPC: G06K7/10

Abstract: PURPOSE: To easily read two-dimensional bar codes. CONSTITUTION: A narrow first raster scanning pattern is formed by projecting a raster light beam upon a target. A user can manually direct the light beam 151 to a desired position by pointing the light beam at the position by using the first raster scanning pattern. A raster scanning system is provided with a scanner which emits the raster light beam and a second raster scanning pattern which sweeps all codes to be read and has a relatively wide width and a detector 158 which receives reflected light 152 from bar codes 170 and generates corresponding electric signals.

公开(公告)号：JPH07200718A

公开(公告)日：1995-08-04

申请号：JP28195194

申请日：1994-11-16

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： JIEROOMU SUUOOTSU ,  YAAIYUN RII ,  POORU DOBUOOKISU ,  GUREN SUPITSUTSU

IPC: G06K7/10 ,  G06K7/14

Abstract: PURPOSE: To provide a new method reading a two-dimensional bar code symbol through the use of a few light sources and mechanically simple structure. CONSTITUTION: This method simultaneously illuminates the plural areas of the different light reflectance in the bar code symbol by using a laser luminous flux 12 with a thin and long cross section. In order that the two-dimensional area of the symbol is illuminated with the lapse of time, the laser luminous flux 12 is swept on the symbol in the crossing direction of the thin and long size of an illuminated area until the symbol is read. Reflected light from the illuminated area of the symbol is image-formed on a linear sensor array. After then the sensor array is scanned to generate an electric signal expressing the spatial intensity difference of light image-formed along the linear path within a viewing range.

公开(公告)号：JPH07254041A

公开(公告)日：1995-10-03

申请号：JP28370094

申请日：1994-11-17

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： RAJI BURITSUJIRARU ,  JIYOSEFU KATSUTSU ,  DEIBUITSUDO PII GOOREN ,  POORU DOBUOOKISU ,  YAAIYUN RII

IPC: G06K7/10

Abstract: PURPOSE: To provide a scanning module which can be improved in sighting and emitting abilities, scanning pattern visibility, and shock resistance, can be constituted in a compact state, and reduced in the cost. CONSTITUTION: The optical scanning of a bar code symbol is first performed in a sighting mode for scanning the symbol by using a closer first scanning pattern so that the symbol can be seen by a user in a relatively small size, and then, a larger and stronger second scanning pattern for decoding. A preferable scanner module is provided with a scanning mirror fitted to a bracket through a leaf spring and the leaf spring is constituted so that the mirror can be vibrated in one direction. The spring is hung from a fixed chassis by using two strips of a mylar (R) film. The two strips themselves are protected from mechanical shocks by means of pins passed through the holes of the bracket. The pins make the bracket to be accurately aligned with the chassis.