| 摘要 |
<p>PURPOSE:To reduce cost and to realize reduction in weight by providing a collar part to the outside peripheral part of a plastic lens, pressing the collar part to a spacing ring and holding the plastic lens by a lens retaining ring via an elastic member. CONSTITUTION:A plastic lens 11 is so fitted to the lens receiving part 4d' of a plastic lens barrel 5' as to contact therewith and thereafter a spacing ring 16a is fitted thereto, by which the plastic lens 11 is held. A glas lens 13 and a spacing ring 16c, a plastic lens 14 and a spacing ring 16d as well as a plastic lens 15 are respectively successively fitted thereto and thereafter an elastic member 16 is fitted thereto and the respective lenses are locked up via a retaining ring 4a' by means of a screw 17. The considerable reduction in cost and weight is realized by using such lens holder.</p> |
