| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lens optical device which realizes simplification of a structure, reduction of the number of components, and the like, facilitates a centering work, and re-uses the components.SOLUTION: A lens optical device comprises: a base 10; optical elements E1, E2(G) and E3 that are secured to the base; a lens 20 that is assembled to the base while centering with respect to the optical elements; and a lens frame 30 that holds the lens. The base 10 includes a reception part 12 for directly abutting the lens in an optical axis direction thereof and for receiving the lens. The lens frame 30 is formed freely detachable/attachable from/to the base and formed into an annular shape, and includes an inner peripheral wall 31 formed to be spaced apart from an outer peripheral surface 22 of the lens by a predetermined gap, and an adhesive agent reservoir part 32 that reserves an adhesive agent adhering at least a part of the outer peripheral surface of the lens. Accordingly, a structure can be simplified and the number of components can be reduced, furthermore even when secured by the adhesive agent or the like after a centering work, a component possibly caused a problem can be easily disassembled, and other components without any problems can be re-used.</p> |
