| 摘要 |
PURPOSE:To measure the performance of a lens easily and reliably, by forming a magnified image through a magnification objective lens by aligning the optical axis of the lens to be measured and the optical axis of an internal light source by means of a position regulator and an angle regulator, and observing as well as picking up the magnified image. CONSTITUTION:The optical axis of an internal light source device and the optical axis of a lens 10 are aligned with each other and the lens 10 is focused by a linear regulator 2 which moves orthogonal triaxial moving tables 21, 23, 25 by means of micrometers 22, 24, 26, respectively, and an angle regulator 3. A magnified focal image corresponding to the lens performance is formed by either of magnification objective lenses 30 and 31 which are different in magnification from each other. This magnified image is divided into two by a prism device and the like, and the divided image parts are observed and picked up, respectively. By this arrangement, the lens can be easily and reliably regulated to its focal position for measuring the performance thereof. |
