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  1. #1
    Join Date
    Apr 2019
    Location
    Queensland
    Posts
    12

    Default Magnefying table

    Years ago I saw a device for magnefying outlines. It had all lenses and mirrors. You put the tool on the table and looked at it on a light screen magnified and to scale. There must be similar things now using cameras and screens. Does anyone know of such a thing?

  2. #2
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default

    What you are looking for is called a number of different things, but optical comparator or shadowgraph should get you what you want.

  3. #3
    Join Date
    Feb 2013
    Location
    Laidley, SE Qld
    Posts
    1,038

    Default

    Or on a larger scale, if signwriters wanted to make a sign that included a big version of say a customer provided small emblem, they would fix a sheet of sign material to the wall of the shed, use a projector device to throw an enlarged image of the emblem onto the sheet, then paint to the image.

    This was pre scanners computers and CNC sign cutters of course.

  4. #4
    Join Date
    Oct 2011
    Location
    Norwood-ish, Adelaide
    Age
    59
    Posts
    6,541

    Default

    This will do something similar to what you want I think -
    https://www.officeworks.com.au/shop/...racer-ja212780

    Michael

  5. #5
    Join Date
    Dec 2007
    Location
    Adelaide
    Posts
    574

    Default

    I worked for a sign writer some (many) years back and he had a device called an epidiascope - rotating a lever on the side opened a door (just smaller than A4 size) on the bottom - an image or anything reasonably flat for that matter was then placed on the door the lever was rotated back - the door lifted and shut and an enlarged image of the object was projected onto a screen/wall etc. focusing and image sizing etc worked the same way a slide projector.

    How big is the thing you are wanting to magnify ? you might want to checkout USB microscope they can display an enlarged image onto a lcd screen or even a mobile phone they can go to over 1000X, ebay is a good place to start looking.

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