I wonder if I can achieve the vacuum by using a domestic air conditioner compressor or the one that uses common refrigerators , I'm tire of silvering with nitrate of plate ,every 4 month the plane oxides and turns brown ,while aluminum last decades, I have more than 20 relfectives telescopes ,most of them for teaching purposes with my students in my class,
nice! I'm glad to see you're getting a result. having watched some of your other videos, I figured you might be up to something lasery by making these. it's something i'd like to have a go at as well. i now have an edwards rotary vane in bits on the floor as I clean it up. there's an alcatel in the post and I might add a leybolds to that :P
I hope you tell us how you managed to cur a circular mirror without breaking the remaining sheet of glass! Looks good so far, but you need a better vacuum. Once you use a TMP or diffusion pump you can glue the gaseous residues inside to the wall in the first phase of evaporation, then uncover the glass substrate (cover it with a sheet of steel and remove it with a magnet from outside :-)) and start coating. try shifting / rotating the glass during evaporation to improve uniformity.
Of course, You only need one copper or brass tube and some abrasive powder. Then you need to add water (make an improvised water dam) and slowly you can cut the glass. There are comertial diamond coring bits, but my method is cheaper. You can test both. Thanks for comment
why did you choose the round piece of mirror? if you continued to burn the filament would it have ruined the coating on the mirror? I noticed that you coated for a much shorter time.
I try to make CO2 laser mirrors. The round form is to practice making round mirrors.
Yes if I continue the burning of the filament the mirror gets ruined. I have many leaks in my vacuum system, but i´m only testing this technique. Now I can improve the system, and the vacuum chamber. I noticed that I have obtained an semi-transparent mirror. (just a few aluminum atoms) But its difficult to control the deposition rate with this technique.Thanks.
@dgalvarez Hi, To get shiny film coating, Try to use diffusion pump with fresh pump oil if you don't want any contamination try to eliminate degassing and use plasma cleaning, clean internal chamber with alcohol, avoid finger prints, use at least 99.5% Al, Try to wet the tungsten filament with Aluminium before evaporation.
you should try making a layden jar like that
NagaJolokiafied 3 weeks ago
Cool, I like it!
TiberiusBrast 8 months ago
I wonder if I can achieve the vacuum by using a domestic air conditioner compressor or the one that uses common refrigerators , I'm tire of silvering with nitrate of plate ,every 4 month the plane oxides and turns brown ,while aluminum last decades, I have more than 20 relfectives telescopes ,most of them for teaching purposes with my students in my class,
antichavista1000 11 months ago
HI there, can I do that with my Telescope mirror of 4.5", because the surface got some scratches ? thank you.
Mastermind2011 1 year ago
nice! I'm glad to see you're getting a result. having watched some of your other videos, I figured you might be up to something lasery by making these. it's something i'd like to have a go at as well. i now have an edwards rotary vane in bits on the floor as I clean it up. there's an alcatel in the post and I might add a leybolds to that :P
lexichronicle2 1 year ago
I hope you tell us how you managed to cur a circular mirror without breaking the remaining sheet of glass! Looks good so far, but you need a better vacuum. Once you use a TMP or diffusion pump you can glue the gaseous residues inside to the wall in the first phase of evaporation, then uncover the glass substrate (cover it with a sheet of steel and remove it with a magnet from outside :-)) and start coating. try shifting / rotating the glass during evaporation to improve uniformity.
hboy007 1 year ago
Hi hboy.
Of course, You only need one copper or brass tube and some abrasive powder. Then you need to add water (make an improvised water dam) and slowly you can cut the glass. There are comertial diamond coring bits, but my method is cheaper. You can test both. Thanks for comment
dgalvarez 1 year ago
why did you choose the round piece of mirror? if you continued to burn the filament would it have ruined the coating on the mirror? I noticed that you coated for a much shorter time.
MaBuSt 1 year ago
I try to make CO2 laser mirrors. The round form is to practice making round mirrors.
Yes if I continue the burning of the filament the mirror gets ruined. I have many leaks in my vacuum system, but i´m only testing this technique. Now I can improve the system, and the vacuum chamber. I noticed that I have obtained an semi-transparent mirror. (just a few aluminum atoms) But its difficult to control the deposition rate with this technique.Thanks.
dgalvarez 1 year ago
@dgalvarez Hi, To get shiny film coating, Try to use diffusion pump with fresh pump oil if you don't want any contamination try to eliminate degassing and use plasma cleaning, clean internal chamber with alcohol, avoid finger prints, use at least 99.5% Al, Try to wet the tungsten filament with Aluminium before evaporation.
Aaronnl 1 year ago