PROBLEM TO BE SOLVED: To have a configuration that accommodates a first and second lens barrels in a third lens barrel, and obtain an excellent optical performance without increase in manufacturing accuracy of each lens barrel or assembling accuracy thereof.SOLUTION: An optical lens barrel 100 includes: a first lens barrel 120 that holds a first optical system 110 a second lens barrel 140 that holds a second optical system 130 and a third lens barrel 150 that has an inner peripheral face of an inner diameter larger than an outer diameter of an outer peripheral face of the first and second lens barrels, and accommodates the first and second lens barrels on an inner side of the inner peripheral face. A correction optical element 160 performing an optical correction to mutual eccentricity among a central axis 151 of the inner peripheral face of the third lens barrel, an optical axis 111 of the first optical system, and an optical axis 131 of the second optical system is held by the inner peripheral face of the third lens barrel.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】第1および第2の鏡筒を第3の鏡筒内に収容する構成を有し、各鏡筒の製造精度や組立精度を上げることなく、良好な光学性能を得る。【解決手段】光学鏡筒100は、第1の光学系110を保持する第1の鏡筒120と、第2の光学系130を保持する第2の鏡筒140と、第1および第2の鏡筒の外周面の外径より大きい内径の内周面を有し、該内周面の内側に第1および第2の鏡筒を収容する第3の鏡筒150とを含む。第3の鏡筒の内周面の中心軸151と第1の光学系の光軸111と第2の光学系の光軸131との相互の偏心に対する光学補正を行う補正光学素子160が、第3の鏡筒の内周面によって保持されている。【選択図】図1
