<P>美国军标:S/D</P>
<P>S為scratch:单位微米</P>
<P>D為dig:丝,1丝=10微米</P></DIV>
<P>应该就是这样</P> <DIV class=quote><B>以下是引用<I>touchsky</I>在2004-8-27 16:35:53的发言:</B>
第一位是擦痕号,是指最大的宽度,单位为微米(如60就是最大宽度为0.06mm)。第二位为麻点的最大直径要求,单位为0.01mm(如40为最大麻点直径为0.4mm)</DIV>
<P>我们就是这样用的。</P> <P>各位高手,可否告知相关资料的详细出处,因为在MIL上并没有对scratch的单位给于定义,它只是表示一个号,相关的说法很多,业界有很多的说法,有说um,也有的说1/100mm,大家不知可否提供相关资料进行讨论,以便共同进步。谢谢!</P> 赞同!
美国军标:S/D
S為scratch:单位微米
D為dig:丝,1丝=10微米 同一楼上的观点!仔细阅读MIL就能找到答案。 美军标上很具体,上面讲的不全. 我想请问一下:我们把它换成国内的光洁度,几级几级的应该是怎么样的?好象大家对这个没有一个很统一的标准。 在《现代光学工程》(英文板)的一本书上有明确的解释:第一位是擦痕号,是指最大的宽度,单位为微米(如60就是最大宽度为0.06mm)。第二位为麻点的最大直径要求,单位为0.01mm(如40为最大麻点直径为0.4mm) 郁闷,越看越糊涂,请问一下,国标表面光洁度II级和美军标10-5那个严?
回复:(ctshlisj)MIL标准中表面光洁度的单位
s的数值与划痕宽度没有简单的对应关系,比较接近的应是0.1微米,而不是1微米,还与小的划痕数量和划痕长度有关,8楼的比较接近。According to the U.S. Military, who defined this spec:
"Scratches and Digs are defined by the U.S. Military Specification for the Inspection of Optical Components, MIL-O-13830A. Scratch numbers are essentially defined by the width of a scratch in 1/10,000 mm. However lengths of scratches and combinations of smaller scratches also contribute to the scratch number. Dig numbers are defined by the actual diameter of a dig in 1/100 mm. Smaller digs and irregularly shaped digs also affect the dig number. Both scratch and dig numbers are defined within certain areas of an optic and are defined differently for optical components by the MIL-Spec. The specification is denoted by the scratch number followed by the dig number."
80-50 Commonly acceptable cosmetic standard
60-40 Good commercial surface
40-20 Starting to be a true optical surface
20-10 High quality non-laser surface
10-10 Suitable for demanding laser applications.
So, in terms of microns, scratch widths are as follows:
80 scratch = 8 microns width
60 scratch = 6 microns width
40 scratch = 4 microns width
20 scratch = 2 microns width
10 scratch = 1 microns width
And digs are:
50 dig = 0.5mm diameter
40 dig = 0.45mm diameter
20 dig = 0.2mm diameter
10 dig = 0.1mm diameter