| 摘要 |
PURPOSE:To hold the capacity of lenses without either peeling-off of lenses or a considerable change of lens shapes by providing an elastically deformable holding part on the outside circumference of the first lens and holding the second lens directly or indirectly in this holding part. CONSTITUTION:The first lens 1a and the second lens 2a are constituted of plastics, and an elastically deformable ring-shaped holding piece 3 is provided along the direction of the optical axis on the outside circumference of the lens 1a, and detaining edges 4 are provided continuously on the inside edge of this holding piece 3 so that their sections are saw tooth-shaped. A jaw piece 6 where detaining edges 5 corresponding to said detaining edges 4 are provided continuously on the circumferential edge is provided on the outside circumference of the lens 2a. The elastic deformation is used to press the lens 2a into the holding piece 3 of the lens 1a, and detaining edges 4 and detaining edges 5 are engaged with each other to joint both lenses 1a and 2a, thus attaining a product A. |
