Open AccessWide viewing angle with a downsized system in projection-type integral photography by using curved mirrors
Author(s) -
Masahiko Yasui,
Yoshihiro Watanabe,
Masatoshi Ishikawa
Publication year - 2021
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.418729
Subject(s) - viewing angle , optics , projector , lens (geology) , projection (relational algebra) , physics , photography , computer science , acceptance angle , integral imaging , computer vision , image (mathematics) , art , algorithm , liquid crystal display , visual arts
To obtain a large viewing angle in conventional projection-type integral photography frameworks, multiple projectors need to be arranged at a particular angle to a lens array. Hence, the systems require a large space. This paper proposes a system that achieves a large viewing angle in a space-saving manner by using curved mirrors that face each other. To this end, a projector is placed directly behind a lens array, and curved mirrors are installed to surround the rays from the projector. The incident angle toward the lens array increases after there are multiple reflections between the mirrors, which increases the viewing angle. In addition, it is not necessary to install the projector at an angle to the lens array, which results in a space-saving system. With the proposed method, a viewing angle of ±60 deg can be achieved.