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Compact image scanner with large depth of field by compound eye system.

Authors
  • Kawano, Hiroyuki
  • Okamoto, Tatsuki
  • Matsuzawa, Taku
  • Nakajima, Hajime
  • Makita, Junko
  • Fujiyama, Naoyuki
  • Niikura, Eiji
  • Kunieda, Tatsuya
  • Minobe, Tadashi
Type
Published Article
Journal
Optics Express
Publisher
The Optical Society
Publication Date
Jun 04, 2012
Volume
20
Issue
12
Pages
13532–13538
Identifiers
DOI: 10.1364/OE.20.013532
PMID: 22714380
Source
Medline
License
Unknown

Abstract

A compact image scanner is designed by using a compound eye system with plural optical units in which a ray path is folded by reflective optics. The optical units are aligned in two lines and take each image of a separated field of view (FOV), slightly overlapped. Since the optical units are telecentric in the object space and the magnification ratio is constant regardless of the object distance, the separated pieces of a total image are easily combined with each other even in the defocused position. Since the optical axes between adjacent optical units are crossed obliquely, object distance is derived from the parallax at each boundary position and an adequate deblurring process is achieved for the defocused image.

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