Patent ID: 7304813

Claim:
An optical imaging unit comprising: a lens barrel having a first lens housing barrel interior portion at a front side of the lens barrel and a second lens housing barrel interior portion at a rear side of the lens barrel, the second lens housing barrel interior portion having a larger diameter than the first lens housing barrel interior portion; a first lens body mounted in the first lens housing barrel interior portion and having a first lens body front surface facing toward the front side of the lens barrel and a first lens body rear surface facing the rear side of the lens barrel, said first lens body rear surface including a first lens body outer peripheral edge at an outer periphery of said first lens body rear surface which is a rearmost surface of said first lens body; a washer fitted in the second lens housing barrel interior portion, the washer having a washer front surface coming into contact with said first lens body outer peripheral edge of the first lens body; a second lens body mounted in the second lens housing barrel interior portion behind the washer, said second lens body having a second lens body front surface facing toward the front side of the lens barrel and including a second lens body front surface outer peripheral edge which is at a forefront of the second lens body front surface; and said washer having a washer rear surface having a washer outer peripheral edge portion which contacts the second lens body front surface outer peripheral edge; wherein at least one surface of said washer rear surface and said second lens body front surface has a recess radially inside of said washer outer peripheral edge portion and the second lens body front surface outer peripheral edge.