IMAGING OPTICAL SYSTEM AND IMAGING APPARATUS

PROBLEM TO BE SOLVED: To provide an imaging optical system and an imaging apparatus that have excellent infrared cutting functions and prevent the occurrence of ghost light caused by infrared cutting structures.SOLUTION: An imaging optical system includes: a front lens group 5 placed on an object si...

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Main Authors SAWAGUCHI SATOSHI, TAKENAKA HIROICHI, TERAO NORIYUKI, YAMAMOTO HIDEAKI, HARADA TORU, ABE KAZUNARI, TANAKA TOMONORI, SHOHARA MAKOTO, IMAE NOZOMI, SATO HIROYUKI, IRINO YOSHIAKI, MASUDA KENSUKE, BESSHO DAISUKE
Format Patent
LanguageEnglish
Published 19.08.2013
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To provide an imaging optical system and an imaging apparatus that have excellent infrared cutting functions and prevent the occurrence of ghost light caused by infrared cutting structures.SOLUTION: An imaging optical system includes: a front lens group 5 placed on an object side; an optical prism 6 that is placed on a light emission side of the front lens group 5 and causes the light flux incident from the front lens group 5 to be emitted while being bent by 90 degrees; and a rear lens group 7 placed on an emission surface 6b side of the optical prism 6 so as to be positioned between an imaging element 3 and the emission surface 6b. The emission surface 6b of the optical prism 6 is applied with IR cut coating 17.
Bibliography:Application Number: JP20120023928