标题: 求救一个镜头加工图纸说明 [打印本页] 作者: xiexinghe 时间: 2009-2-19 21:39 标题: 求救一个镜头加工图纸说明 接到一个订单，图纸上要求 有一项 3/2(0.5/0.25)这是个对光圈的要求标准，但我们一直做的是日本图纸，日本的是这样的3/2(0.5)就是2个光圈，0.5个局部误差，但这个3/2(0.5/0.25)是用的iso 10110-5的标准，客户的回复如下：3/ = Surface form tolerance in accordance to ISO10110-5 The surface form is indicated by a code number and indications of the tolerance for sagitta deviation, irregularity, rotationally invariant irregularity and rms deviation types , as appropriate.All units shall have their units specified. If no unit is indicated , then fringe spacing is implied.
3/2(05/0,25) means The tolerance for sagitta deviations is 2 frings the total irregularity may not exceed 0,5 frings spacing. The rotationally symmetric may not exceed 0,25 frings spacing.The wavelength for all surface form deviation specifications is λ 632,8nm
我的问题是这样的：1，3/2(0.5/0.25)具体要求的是什么？
2，怎样用仪器测量？
3，测量的有效范围是多少直径？