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  1. #71
    AgX
    AgX is offline

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    Thought about old Archimedes and my lab lever scale too. But I was not sure about that holding devise. Most probably one has to do 4 measurements, two for that device and two for the device with the lens attached.

  2. #72
    Mustafa Umut Sarac's Avatar
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    I was thinking that I had been written everything cover colors of imaging technology. There are even more. Wet etching is the same class technology with magnetorheological finishing but it does not require to be electrical engineer for to design magnets and need of cleaning expensive magnetic liquids.
    Hydrofluoric acid is the enemy of glass and it melts the glass. Same kind of chemicals and creating a wet point on the glass can make your lens.
    Well , it is my part to put the news in front of you , your part is to realize it.

    Best ,

    Mustafa Umut Sarac

  3. #73

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    Hydrofluoric acid, that is very nasty stuff. I would not want that around my house. If you are not careful you could lose fingers, skin, and/or much more.
    It's not the camera......

  4. #74
    Mustafa Umut Sarac's Avatar
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    Freygr , do you know more friendly chemical for to etch the glass ?

  5. #75
    Mustafa Umut Sarac's Avatar
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    Here is the list of patents about magnetorheological finishing.No 27 and 26 is so detailed and i beleive someone who has strong will - like me - can make a mrf machine. I think it is an russian invention and came to usa with cold war ways. If you search with numbers , here is the link.
    Agx I think you interest with it , i m dreaming to carve a flat piece of glass ... phwww...
    http://patft.uspto.gov/netahtml/PTO/srchnum.htm
    1 7,224,469 Optical system alignment system and method with high accuracy and simple operation
    2 7,162,302 Magnetically shielded assembly
    3 7,156,724 Method and apparatus for forming a dynamic magnetic seal using magnetorheological fluid
    4 7,127,294 Magnetically shielded assembly
    5 7,091,412 Magnetically shielded assembly
    6 6,971,391 Protective assembly
    7 6,955,589 Delivery system for magnetorheological fluid
    8 6,927,922 Imaging using a multifocal aspheric lens to obtain extended depth of field
    9 6,925,840 Method of making a photonic crystal preform
    10 6,920,765 Combined advanced finishing and UV laser conditioning process for producing damage resistant optics
    11 6,893,322 Method and apparatus for measuring and controlling solids composition of a magnetorheological fluid
    12 6,852,219 Fluid separation and delivery apparatus and method
    13 6,819,438 Technique for fabricating high quality optical components
    14 6,746,310 Uniform thin films produced by magnetorheological finishing
    15 6,740,194 Apparatus for etching or depositing a desired profile onto a surface
    16 6,719,611 Jet-induced finishing of a substrate surface
    17 6,561,874 Apparatus and method for abrasive jet finishing of deeply concave surfaces using magnetorheological fluid
    18 6,555,017 Surface contouring by controlled application of processing fluid using Marangoni effect
    19 6,506,102 System for magnetorheological finishing of substrates
    20 6,309,285 Magnetic wiper
    21 6,267,651 Magnetic wiper
    22 6,106,380 Deterministic magnetorheological finishing
    23 5,951,369 System for magnetorheological finishing of substrates
    24 5,839,944 Apparatus deterministic magnetorheological finishing of workpieces
    25 5,804,095 Magnetorheological fluid composition
    26 5,795,212 Deterministic magnetorheological finishing
    ABOVE PATENT MUST BE A READ
    27 5,616,066 Magnetorheological finishing of edges of optical elements

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