| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a resin lens capable of increasing or reducing the effective radius with a small cost for cutting a gate portion.SOLUTION: The outer peripheral surface of a lens body 25 is formed along a virtual circle 28 of the radius preset excluding a portion to be connected to a gate portion 24. At the portion where the gate portion 24 on the outer peripheral surface of the lens body 25 is connected, a recess 61 of a shape recessing toward the center in radial direction of the lens body 25 is formed over a range wider than the width of the gate portion 24 when the lens is formed. The outer peripheral surface of the lens body 25 in the recess 61 is formed in an arc shape in a nesting manner at the outer side than an outer edge of a portion (boundary 26) and the inner side than the virtual circle 28. The plane which is formed by removing the gate portion 24 is formed at the inner side than the virtual circle 28.</p> |
