OPTICAL DEVICE HAVING IMAGING OPTICAL SYSTEM

摘要

PROBLEM TO BE SOLVED: To produce lens displacement for vibration absorption without using a shake sensor or an actuator. SOLUTION: An optical device 10 has: an imaging optical system 11 including a first positive refractive power lens IS; and a holder mechanism 15 holding the first lens in a manner free to turn around the turn center XA of the image side. The first lens has a convex surface (a) having larger refractive power on the object side than on the image side, and its material satisfies the conditions 1.8