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- Q1505601 subject Q8501197.
- Q1505601 abstract "Lapping is a machining process, in which two surfaces are rubbed together with an abrasive between them, by hand movement or using a machine.This can take two forms. The first type of lapping (traditionally called grinding), involves rubbing a brittle material such as glass against a surface such as iron or glass itself (also known as the "lap" or grinding tool) with an abrasive such as aluminum oxide, jeweller's rouge, optician's rouge, emery, silicon carbide, diamond, etc., between them. This produces microscopic conchoidal fractures as the abrasive rolls about between the two surfaces and removes material from both.The other form of lapping involves a softer material such as pitch or a ceramic for the lap, which is "charged" with the abrasive. The lap is then used to cut a harder material — the workpiece. The abrasive embeds within the softer material, which holds it and permits it to score across and cut the harder material. Taken to a finer limit, this will produce a polished surface such as with a polishing cloth on an automobile, or a polishing cloth or polishing pitch upon glass or steel.Taken to the ultimate limit, with the aid of accurate interferometry and specialized polishing machines or skilled hand polishing, lensmakers can produce surfaces that are flat to better than 30 nanometers. This is one twentieth of the wavelength of light from the commonly used 632.8 nm helium neon laser light source. Surfaces this flat can be molecularly bonded (optically contacted) by bringing them together under the right conditions. (This is not the same as the wringing effect of Johansson blocks, although it is similar).".
- Q1505601 thumbnail Small_Lapping_Plate.jpg?width=300.
- Q1505601 wikiPageExternalLink 2011ProductionMachiningDiamondLappingandPlateControl.pdf.
- Q1505601 wikiPageWikiLink Q1136648.
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- Q1505601 wikiPageWikiLink Q483269.
- Q1505601 wikiPageWikiLink Q5283.
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- Q1505601 wikiPageWikiLink Q677.
- Q1505601 wikiPageWikiLink Q708.
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- Q1505601 wikiPageWikiLink Q768575.
- Q1505601 wikiPageWikiLink Q840692.
- Q1505601 wikiPageWikiLink Q8501197.
- Q1505601 wikiPageWikiLink Q850283.
- Q1505601 comment "Lapping is a machining process, in which two surfaces are rubbed together with an abrasive between them, by hand movement or using a machine.This can take two forms. The first type of lapping (traditionally called grinding), involves rubbing a brittle material such as glass against a surface such as iron or glass itself (also known as the "lap" or grinding tool) with an abrasive such as aluminum oxide, jeweller's rouge, optician's rouge, emery, silicon carbide, diamond, etc., between them.".
- Q1505601 label "Lapping".
- Q1505601 depiction Small_Lapping_Plate.jpg.