公开(公告)号：JPH07192075A

公开(公告)日：1995-07-28

申请号：JP29473292

申请日：1992-11-04

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： SHIMON BAADO ,  BORISU METORITSUKII ,  MAAKU KURITSUSHIEBAA ,  JIEROOMU SUUOOTSU ,  ASUKORUDO SUTORATEIENKO ,  JIYOSEFU KATSUTSU

IPC: G06K7/10 ,  G06F1/16 ,  G06F3/033

Abstract: PURPOSE: To provide a compact bar code scanner which can operate scanning in one of several modes by including a double resonance structure which generates a (y) vertical scanning motion with either a high frequency or a low frequency. CONSTITUTION: A light beam from a proper source such as a visible laser diode(VLD) 26 is introduced to a high speed horizontal (x) deflection array 28 in which the (x) scanning deflection of the beam is operated at a high speed at first. The obtained (x) scanning beam is introduced to a vertical (y) deflection array 30 in which the vertical scanning deflection of the beam is operated at a low speed or a high speed, and raster and full directional scanning patterns are generated, or the vertical scanning deflection is not operated. The array 30 includes a flexible base having two degree of mechanical freedom for providing two resonating states, that is, low frequency (y) scanning for the raster pattern, and high frequency (y) scanning for the full directional pattern. Also, the array 30 is driven by an electromagnetic force generated by a coil 44 surrounding a permanent magnet 42 fixed to the array 30.