Nidec Sankyo Corporation

Panasonic Automotive Systems Co., Ltd.

Akinori Yamamoto

Toshio Shirotori

Yasuo Tsuruoka

Shinya Okada

Katsumi Umeda

Masanori Tanikawa

A lens unitincludes a plurality of lenses aligned in a row along an optical axis L and a lens holder. A first lens Llocated the closest to an object-side La includes an object-side lens surface, an image-side lens surface, and an image-side flange surface. A first housing portionaccommodating the first lens Lin the lens holderincludes a regulation portionregulating a position of the first lens Lin the optical axis L direction. The regulation portionincludes a lens seating surfacein contact with the first lens L. The image-side flange surfaceof the first lens Lincludes an outer peripheral regionA in contact with the lens seating surfaceof the regulation portionand an inner peripheral regionB in which a flexible printed circuit boardis disposed.

Lens unit

A lens unit includes a first lens disposed on an object side in an optical axis direction, a plurality of image-side lenses (second lens through seventh lens) comprising a second lens facing the first lens on an image side in the optical axis direction and disposed on the image side with respect to the first lens, a lens barrel coaxial with the optical axis to hold the first lens and the plurality of image-side lenses radially inside, a first sealing member to seal a gap between the first lens and the lens barrel, and a second sealing member to seal a gap between an image side surface (flange surface) of the first lens and the lens barrel radially inside the first sealing member.

Lens unit for preventing lens surface being clouded

Growing community of inventors

Nagano, Japan

Akinori Yamamoto