| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens which can be easily manufactured while obtaining desired optical characteristics, which realizes a small-size device, and which can decrease loss in light due to the adhesive intruding into the joined faces of the lens and other optical elements, and to provide a joined body of optical parts by using the above lens. SOLUTION: The lens has a lens face including a convex face which acts as a lens and has a joining part to join other optical parts to the lens face, with the joining part formed in a part which is not used as the optical path of the lens face. The joining part is protruding to the height equal to or higher than at least the peak of the convex face and in the outside of the direction of the optical axis. Other optical elements such as optical filters or the like are to be joined by using an adhesive to the joining part of the lens.
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