发明授权
- 专利标题： Optical scanner using planar reflection holograms
- 专利标题（中）： 光学扫描仪采用平面反射全息图
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申请号： US978509申请日： 1992-11-18
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公开(公告)号： US5245170A公开(公告)日： 1993-09-14
- 发明人: Hirokazu Aritake , Toshiyuki Ichikawa , Kozo Yamazaki , Fumio Yamagishi , Hiroyuki Ikeda
- 申请人： Hirokazu Aritake , Toshiyuki Ichikawa , Kozo Yamazaki , Fumio Yamagishi , Hiroyuki Ikeda
- 申请人地址： JPX Kawasaki
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： JPX Kawasaki
- 优先权： JPX63-325033 19881220; JPX63-325034 19881220; JPX63-325035 19881220; JPX1-006702 19890113; JPX1-012609 19890119
- 主分类号： G06K7/10
- IPC分类号： G06K7/10
摘要：
An optical scanner suitable for use with a bar code reader includes a light source for generating a laser beam, a laser beam scanning device, a scanning pattern generating optical system, and a signal light condensing optical system for deflecting scattered signal light scattered by an object to be read to introduce the light to a photo-detector. The scanning pattern generating optical system or signal light condensing optical system includes strips of planar reflective holograms disposed substantially in parallel with each other in one plane to produce a reflection beam having an angle of reflection which is different from an angle of incidence of the laser beam thereon. Another embodiment discloses a condenser integrated with one of plane mirrors for deflecting the scan beam to form a hologram module of the reflection type. The scanner is a miniaturized apparatus as a result of the reflection holograms.