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Thread: Immediate Help. Blank Size Calc.

  1. #1
    OptiBoard Professional skirk1975's Avatar
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    Angry Immediate Help. Blank Size Calc.

    HELP!


    What is the formula to calculate Black Size needed for a lens. Taking into consideration decentration..... I need it right away . . . .

    Thanks.......

  2. #2
    OptiBoard Professional Excel-Lentes's Avatar
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    Effective Diameter + 2(Decentration) = MBS

  3. #3
    Underemployed Genius Jacqui's Avatar
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    Yup, that's how I do it.

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    Master OptiBoarder OptiBoard Gold Supporter Judy Canty's Avatar
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    Now that, hopefully, your immediate crisis has passed, I might suggest that every lab have a copy of "Optical Formulas Tutorial" by Stoner and Perkins. It's used extensively in the college-based Opticianry programs and a god-send for those of us who learned these things many years ago and sometimes forget. You can find it at the NAO website, www.nao.org.

  5. #5
    OptiBoard Professional Excel-Lentes's Avatar
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    I have to agree with Judy. That book was not available when I went to school but I certainly wish it was. It is a most excellent compilation of the most useful formuals we run across. Plus it is very clear and easy to use and understand.

    I used this text when studying for the ABOM exam a number of years ago and it did wonders. I can't recommend it enough.

    -Brendan

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