| 摘要 |
An optical unit (13) includes an optical system (16), a lens barrel (15), and a securing portion (21). The optical system (16) includes a plurality of optical elements (22 to 26). The lens barrel (15) has an object side opening smaller than an outermost periphery of the optical element (22) closest to an object side in the optical system (16). The lens barrel (15) has an imaging side opening equal to or larger than an outermost periphery of the optical element (26) closest to an imaging side in the optical system (16). The lens barrel (15) accommodates the optical system (16). The securing portion (21), at the imaging side opening, secures the optical system (16) inserted from the imaging side opening and accommodated in the lens barrel (15). |
