ED102 电脑测试报告
今天正在准备同好们预订的ED镜子，第一次测试ED102 F7 ，就把北京solaris_vip同好预订的镜子拿出来与TV85 F7做对比。Maxvision ED102 F7
double PV 值= 0.249波长
PV=0.1245波长=1/8波长
TV85 F7
double PV 值= 0.244波长
PV=0.122波长=1/8.2波长
这只是我们内部的电脑测试，
待这些预订ED镜子的同好自己测试后再来和大家交流吧。
::37:: ::32:: ::31:: 今后我们逐步做到每支ED都自带电脑检测报告，
设计师许哥哥和kmsu哥哥会在第一批ED镜子的报告上签字。 看不懂::44:: 解释一下把，难道这个报告出来说明超过TV85？ 正想请教一下，PV值代表什么意思？ 对比中，另一个常见品牌的 80ED F6.8
double PV 值= 0.481波长
PV=0.2405波长=1/4.16波长
好的，在新网站上 ，我们的光学总设计师许哥哥，会有个专栏，专门与大家沟通。
对比下来，同样F值的基础上，我们略低于TV 但比另一常见品牌的要好得多。
以后我们的检测会越来越严格和透明。 你说的那个不说我都能猜出来，呵呵。对大观的这个三片结构，我还是充满信心的，希望你们能够做得更好::32::
我想问一下 波峰值代表什么意思呢？说明镜子的那一部分特性？ 主要指面形精度
pv 值指的是干涉仪测出值所成的曲线的峰谷值，也就是最大最小值之差
当然这只是报告的一个部分，和一个数据，具体的我们会整理一下再通报大家。 新手……看不懂::0020:: 只想看实拍报告。。。 [摘自Zygo,原文和图示请参考附件]
What’s the difference between PV and RMS?
Peak-to-Valley error (PV) is a worst case error statistic. Calculation of the PV error uses
only the high and low point on the surface relative to the reference surface. Since this
only compares two points on the surface, it is possible for two very different surfaces to
have the same PV error. The PV error does have the advantage that it is very easily
estimated visually from the interferogram. It has the disadvantage that one small dig, or
other artifact in the surface, can cause the PV to be very large even though the optic may
perform quite well.
Root-mean-square error (rms) is an area weighted statistic. The rms is calculated as the
standard deviation of the height (depth) of the test surface relative to the reference at all
the data points in the interferogram. The rms has the advantage of more accurately
reflecting the optical performance of the surface being measured.
There is no specific constant of proportionality relating the PV and rms errors. This ratio
is dependent on the process used to generate the surface and the instrument used to
measure the surface. Polished optical surfaces measured with a Zygo interferometer will
typically show the PV error of the surface to be between a factor of 3 and 5 greater than
the rms error. Surface with high spatial frequencies, such as diamond-turned surfaces, will
generally show a smaller factor, in the range of 2 to 3. A very large ratio is often a sign
that there are noisy data points in the measurement. It is recommended to examine a plot
of the data to understand why the a high ratio is obtained. Cleaning and re-measuring the
part may be advisable. The problem may also be fixed by properly focusing the
interferometer on the part. 恭喜楼上得一宝物。::42:: 用户: 我爱祖祖 在文中写到:
恭喜楼上得一宝物。
感谢祖祖兄弟，呵呵，等的好苦呀，终于看到曙光了！::laugh:: 是啊，等到最后都是最好的::32:: 专业精神，值得称赞！童叟无欺。 PV就是物镜的面型加工精度吧？反射镜要求较高，一般是1/8波长。折射镜如果也能达到1/8，那是相当好了。精益求精的结果…… 先泼瓢冷水,这个是在检测实验室里的成绩,到用户手上,用户再带出去观测,基本是达不到这个水平的.当然,厂家做到这样已经不容易了. 是啊，指标有一些都很抽象，镜子这个东西还是需要放在一起才看得出来，不过对晶华的这款产品，还是比较看好的 谢谢各位大师指点，我们也是刚开始做ED高端产品，所以在检查手段上，我们会越来越成熟的。
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