Optical unit and method for assembling the same
AssigneeOlympus Optical Co., Ltd.
InventorsOsamu Nishimura, Hideto Yamashita
Life of this patent
Estimating the term…
Abstract
An optical unit includes a lens and a lens frame to support the lens. The lens frame includes a cylindrical portion and a U-shaped portion. The U-shaped portion has a U-shaped cross-section. The cylindrical portion has an edge and an inner surface in contact with an outer surface of the lens. The U-shaped portion is formed integrally with the edge of the cylindrical portion and holds the lens. With the lens held, the U-shaped portion is adhesively bonded to the cylindrical portion and then is removed from the cylindrical portion.
Claims3
An optical unit comprising a plurality of lenses, each of the lenses having a lens surface and an optical axis, and a lens-holding apparatus,
- the lens-holding apparatus including a plurality of lens frames holding at least one lens respectively, and a lens barrel,
- the lens frames having portions overlapping with each other in a radial direction orthogonal to the optical axis when the lens frames are arranged adjacent each other along the optical axis,
- the lens-holding apparatus being provided with a first clearance in the adjacent two lens frames between the overlap portion of one lens frame and the overlap portion of the other lens frame in a radial direction orthogonal to the optical axis,
- the lens-holding apparatus being provided with a second clearance in the radial direction between the lens surfaces of lenses held by the adjacent two lens frames,
- the first clearance being smaller than the second clearance, and
- the lens frames being arranged in the lens barrel.
Dependencies are inferred from the claim text.