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Single Point diamond turning glass...
While back I heard optics and first surface mirrors are single point
diamond turned on special CNC lathes, than hand figured. Last few months I've been working for an optics company, told my boss about it, but he said it's imposable. Single point diamond can't cut glass, not accurately. I even showed him these web-sites here. http://en.wikipedia.org/wiki/Diamond_turning http://www.diamond-turning.com/ http://www.lwoptics.com/precOptAssembly.html http://www.iop.org/EJ/abstract/0960-1317/14/12/013 http://www.siltint.com/Technical/diamond.htm Any one knows more about diamond turning glass and how it is done? JS |
#2
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Single Point diamond turning glass...
Protagonist wrote:
While back I heard optics and first surface mirrors are single point diamond turned on special CNC lathes, than hand figured. Last few months I've been working for an optics company, told my boss about it, but he said it's imposable. Single point diamond can't cut glass, not accurately. I even showed him these web-sites here. See: Large Optics Diamond Turning Machine http://www-eng.llnl.gov/lodtm/ For instance, the Keck Telescope IR Secondary Mirrors were turned on this machine. See: http://www-eng.llnl.gov/lodtm/pdf/HI_SPIE_DT1.pdf |
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Single Point diamond turning glass...
lal_truckee wrote:
Protagonist wrote: While back I heard optics and first surface mirrors are single point diamond turned on special CNC lathes, than hand figured. Last few months I've been working for an optics company, told my boss about it, but he said it's imposable. Single point diamond can't cut glass, not accurately. I even showed him these web-sites here. See: Large Optics Diamond Turning Machine http://www-eng.llnl.gov/lodtm/ For instance, the Keck Telescope IR Secondary Mirrors were turned on this machine. See: http://www-eng.llnl.gov/lodtm/pdf/HI_SPIE_DT1.pdf LODTM can diamond turn normal and grazing-incidence optics to tolerances of 25-nm rms figure and 50–100 Å rms surface finish. Diamond-turnable materials such as copper, nickel, aluminum, and plastics are necessary for these tolerances. How about glass, like Pyrex or others type to be turned with single point diamond? JS |
#4
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Single Point diamond turning glass...
Protagonist wrote: While back I heard optics and first surface mirrors are single point diamond turned on special CNC lathes, than hand figured. Last few months I've been working for an optics company, told my boss about it, but he said it's imposable. Single point diamond can't cut glass, not accurately. I even showed him these web-sites here. Single point diamond optical lathes are accurate enough to put a good surface on IR optics (about 2.5 waves of yellow light) up to several meters in size. These surfaces can then be smoothed with normal (computer controlled) polishing techniques, and then figured in ion mills to very high surface accuracies (20 nm). Eye glasses can be directly turned on these lathes to accepatable accuracies (because eye glasses do not need to be good optical surfaces). |
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Single Point diamond turning glass...
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#6
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Single Point diamond turning glass...
wrote in message oups.com... Protagonist wrote: While back I heard optics and first surface mirrors are single point diamond turned on special CNC lathes, than hand figured. Last few months I've been working for an optics company, told my boss about it, but he said it's imposable. Single point diamond can't cut glass, not accurately. I even showed him these web-sites here. Single point diamond optical lathes are accurate enough to put a good surface on IR optics (about 2.5 waves of yellow light) up to several meters in size. These surfaces can then be smoothed with normal (computer controlled) polishing techniques, and then figured in ion mills to very high surface accuracies (20 nm). Eye glasses can be directly turned on these lathes to accepatable accuracies (because eye glasses do not need to be good optical surfaces). Also contact lenses are done the same way. Best Wishes |
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