| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens unit constituted so that the positioning of lenses of an imaging optical system constituted of three or more lenses in both of an optical axis direction and a direction orthogonal to the optical axis can be accurately performed, and which can easily cope with the high pixel imaging device, and to provide an imaging unit equipped with the lens unit. SOLUTION: The lens unit is constituted in such a way that a contact part of each lens coming into contact with another lens is integrally formed in a part other than an optical effective surface, and the contact part of each lens comes in contact with another contact part, and the lenses are joined and fixed in a state where the optical axes of the lenses align with one another, alternatively, at least one of the lenses is formed so that it can slide in contact with another lens, and the lenses are joined, fixed, and integrated after aligning. COPYRIGHT: (C)2005,JPO&NCIPI
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