| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for measuring the eccentricity of specular pieces for lenses for measuring and evaluating displacements in the locations of the specular pieces for lenses in a metal mold for injection-molding an optical image-forming element. SOLUTION: The attitude of the metal mold to the movement of a lens forming surface in the arranging direction is set by a setting means 6. The metal mold is moved in the arranging direction of the lens forming surface by a metal mold moving means 7. The location of the metal mold moving means 7 at the time is detected by a detecting means, and the curvature center locations of the incident-side and image-forming-side specular pieces 1 and 2 are detected by curvature center location detecting optical parts 4 and 5. Operations based on the curvature center locations detected by the curvature center location detecting optical parts 4 and 5 and the location of the metal mold moving means 7 detected by the detecting means are performed by an operating means to measure the eccentricity of the incident-side and image- forming-side mirror frames 1 and 2 for lenses.
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