Scratch dig spec
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Scratch dig spec
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WebA scratch and dig spec can be written and an inspection standard developed around any known requirements. The sample specifications listed above are intended to provide a … WebScratch-dig specifications of 40-20 are widely considered standard quality for many optical applications. Precision laser applications typically require a scratch-dig of 20-10, whereas the most demanding laser applications, such as intra-cavity laser optics, usually require a …
WebMay 8, 2014 · The dig number is the number mentioned second in the scratch/dig combo. For example, 50 would be the dig specification in 80/50. MIL spec. states that dig … WebNov 26, 2006 · According to many, the scratch-dig ratio standard is largely a cosmetic standard for appearance of a surface, and an old standard at that. There are also investigations showing that a better scratch-dig ratio does not necessarily mean less scatter. So the plot thickens and the waters get murkier it seems.
WebThe permissible number of maximum size digs shall be one per each 20mm of diameter or fraction thereof on any single optical surface. The sum of the diameters of all digs as estimated by the inspector shall not exceed twice the diameter of the maximum size specified per 20mm diameter. WebThe standard refers to Drawing C7641866, a separate document that has gone through numerous revisions to describe scratches. While digs are spelled out within the Mil-Spec, …
WebDIG A dig is a round pit or mark, including a bubble. Dig is a bit more quantitative because it is the approximated by the diameter of a “dig”. If the dig is not perfectly round, then the dig value is the average of the length and width. As with the scratch designation, there are more details in MIL-PRF-13830B such as “the total
WebScratch and Dig Primer 2024 - Savvy Optics bowling thumb tape alternativeWebScratch and Dig. Although this standard is based on a comparison to a certified optical comparator, the following general guideline is commonly accepted when referencing a scratch and dig specification: The first number represents the maximum allowable scratch width in microns (20/10 = no scratches greater than 20um wide allowed). The second ... bowling thumb tape 1WebTypical Scratch and Dig Specifications: 120/80 Defects are clearly visible in normal room lighting. This is generally a commercial specification for glass that will be exposed to further wear. 80/50 Defects are discrete but visible in normal room lighting. This specification is typical for commercial and noncritical optical applications. bowling thumb tape thicknessWebA guide to Optical Surface Quality Standards: ISO 10110-7 and MIL-PRF-13830B Download Now Metrology We’re helping organisations all over the world reap the benefits of world-leading metrology. Speak to our experts. Get in touch bowling thumb tape placementWebThe dig specification defines the maximum allowable diameter of any dig in the surface. In the case of irregular shaped digs, the average diameter of shape is used Typical Dig size … bowling thunderWebA ritalic prism can produce a lateral displacement of light, but does not change its direction of propagation. Rhombic prism is widely used in stereoscopic microscope, periscope and … bowling thumb tapeWebScratch-dig spec for the optic is 40-20; so an allowable imperfection in the coating / scratch on the glass [40um width] is 3-4x this 12 micron diameter limit. This doesn't seem correct. Any advice / discussion is more than welcomed. Thanks, AoN. Edit: 1) 100mJ pulses, 10ns duration at 1064nm, approx area 1cm^2 at the first optic. bowling thumb tape roll