万能工具显微镜是用途很广的光学计量仪器,应用它对多种工件实现精密测量。它的一种基本测量方法是影象法。由于成象光线不全是与光轴方向平行的光束,就给测量带来了不允许的误差。通常选择正确的照明光阑孔径(又称“最佳光圈”),来消除这一误差。所以照明光阑孔径标尺的正确否,直接影响到测量 Universal Tool Microscope is a versatile optical metrology instrument that uses it to make precise measurements on a wide range of workpieces. It’s a basic measurement method is the image method. Because the imaging light is not parallel to the optical axis parallel to the beam, it gives the measurement does not allow the error. Usually choose the correct aperture of the diaphragm (also known as “best aperture”), to eliminate this error. Therefore, the correct aperture iris scale directly affect the measurement