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  1. #1
    Mustafa Umut Sarac's Avatar
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    Cut Cylinderical Lens without Frosting , Is water jet suitable ?

    I found that pouring and setting big cube of acrylic and cutting cylinderical lenses in it is good idea for diy lens. I got a pm from Steve Smith advising me laser cutter. But as long as I see laser cutter frost the plastic. AFAIK water jet cutters used in glass lens production.

    I want to learn do water jet frost or scratch the acrylic ?

    Umut

  2. #2
    Steve Smith's Avatar
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    Laser can give a surprisingly good finish to clear acrylic but however you cut it, I think it would need some polishing.


    Steve.
    "People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.

  3. #3
    Mustafa Umut Sarac's Avatar
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    Yes Steve , I looked to youtube and laser frost the acrylic heavily. I am thinking to not use spacers , aluminum parts when making lenses and I am thinking to cut everything in one package. I mean acrylic would be the lens and the case. So I cant polish the lens element because they are tightly packaged.

    I skip the laser cutting and turned in to water jet. I need to know how it does work ?

    Umut
    Last edited by Mustafa Umut Sarac; 08-11-2013 at 04:46 AM. Click to view previous post history.

  4. #4
    lxdude's Avatar
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    Water jets typically use an abrasive in the water. Even using pure water and no abrasive the finish will be frosted.

    www.youtube.com/watch?v=foWsg4rDrKk
    I do use a digital device in my photographic pursuits when necessary.
    When someone rags on me for using film, I use a middle digit, upraised.

  5. #5
    Mustafa Umut Sarac's Avatar
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    Thank you very much lxdude. I think there is only one option remained , laser and water wont work.

    Does CNC mill cut clean ? I went to GM Fanuc CNC programming course but I did not experience live about plastics. I learned there there is a option for polishing with cnc mill but I dont know.

    Do CNC mill cut clean ?
    By the way I will look at youtube also.

    Umut

  6. #6
    Mustafa Umut Sarac's Avatar
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    http://www.youtube.com/watch?v=qyIVZD7rPzM

    cnc mill also frost the lens , project is dead.

    Umut

  7. #7
    bsdunek's Avatar
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    You might look into amateur telescope making. My late uncle used to hand grind up to 14 inch mirrors for telescopes. Here are a couple of sites that might give you some ideas.
    http://mysite.verizon.net/res6jv9o/a...ains/id20.html
    or
    http://binoculars.clutchot.com/?p=1330
    Bruce

    Moma don't take my Kodachrome away!
    Oops, Kodak just did!


    BruceCSdunekPhotography.zenfolio.com

  8. #8
    Mustafa Umut Sarac's Avatar
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    Hello Bruce,

    I am looking for a way to manufacture your own lens product in mass quantities with the help of most widely available machine park.
    To do it , I selected cylinderical lenses because you can route it from the top with laser , jet or mill. I bumped to a technological problem is frosting of cut plastic. I think there might be a honing cnc machine to remove the frost from the plastic. If I cant overcome this , molding the acrylic in to shape is the only answer to problem.

    Hand grinding spherical lenses are ULTRA dangerous and they cut your hand until the bone.

    Umut

  9. #9
    AgX
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    Quote Originally Posted by Mustafa Umut Sarac View Post
    Does CNC mill cut clean ? I went to GM Fanuc CNC programming course but I did not experience live about plastics. I learned there there is a option for polishing with cnc mill but I dont know.
    CNC milling machines use the same tools as manual controlled machines.

    Using a rinsing fluid might have positive effect by removing those cut off bits of plastic. The same time the cooling might be counterproductive on the surface smoothness.

  10. #10
    Mustafa Umut Sarac's Avatar
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    Hello AgX,

    May be rinsing oil is helpful but how do they interact with plastic , I dont know. I am going to ask all questions to cnc machining forum and report here.

    Umut

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