Open AccessPractical design for compact image scanner with large depth of field by compound eye system
Author(s) -
Hiroyuki Kawano,
Tatsuki Okamoto,
Hirochika Nakajima,
Shigeru Takushima,
Yoshitaka Toyoda,
S. Yamanaka,
Tetsuo Funakura,
Kosaku Yamagata,
Taku Matsuzawa,
Tatsuya Kunieda,
Tadashi Minobe
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.018010
Subject(s) - scanner , optics , field of view , image processing , image quality , computer science , compound eye , optical imaging , computer vision , image (mathematics) , physics
We designed a new image scanner using the reflective optics of a compound eye system that can easily assemble plural imaging optical units (called imaging cells) and is compact with a large depth of field (DOF). Our image scanner is constructed from 32 reflective imaging cells, each of which takes an image of approximately a 10-mm field of view (FOV) that slightly overlap the adjacent imaging cells. The total image is rebuilt by combining the 32 images in post processing. We studied how to fold the optical path in the imaging cells and simplified the structure, resulting in the following three advances of our previous work: 1) greater compactness (50 × 31 mm2 in the cross section), 2) less variable optical characteristics among the imaging cells, and 3) easy assembly thanks to small number of optical components constructing the imaging cell.