| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin lens with which inclination of the resin lens is accurately obtained even when reflected light from a mirror surface part of the resin lens does not condense to nearly one point in measuring the inclination of the resin lens.SOLUTION: The resin lens includes an optical functional part 2 which has an optical function, and a face part 41 for measurement which is arranged on a periphery of the optical functional part 2 and which can measure inclination of an optical axis of the optical functional part based on reflection of light. Differently reflecting regions 42 are provided on the face part 41 for measurement. A light reflectance and/or a direction of light reflection of the differently reflecting regions 42 are/is set to be different from those/that of the main region 53 of the face part for measurement, which is a region of the face part 41 for measurement other than the differently reflecting regions 42. Three or more differently reflecting regions 42 are provided in the circumferential direction of the optical functional part 2 with spacings. |
