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Thread: Advice for 405nm Laser Polygon Mirror Scanning Device

  1. #11
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    ... you can "adjust" the f-theta by placing a focussing lens between the diode and the f-theta - the "dirstortion" (or better "correction") depends on the lense's FL

    Viktor
    Aufruf zum Projekt "Müll-freie Meere" - https://reprap.org/forum/list.php?426
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  2. #12
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    Dec 2020
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    Quote Originally Posted by VDX View Post
    ... you can "adjust" the f-theta by placing a focussing lens between the diode and the f-theta - the "dirstortion" (or better "correction") depends on the lense's FL

    Viktor
    Will look into that.

  3. #13
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    Nov 2020
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    Default Edmunoptics

    here is a link that might be helpful in your project
    https://www.edmundoptics.com/knowled...-stock-optics/

  4. #14
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    You may want to reach out to Semrock. They have a wide selection of optical coatings and they will also do custom coatings in small lots.

    I worked with them a long time ago to create some custom dichros with a very narrow cuttoff to allow mixing of 642nm red with 660 nm red. I suspect they'd be able to create a custom-coated F-Theta lens for you that would be appropriate for 405 nm, even in lots of 1 to 4 pieces, but I will warn you that they aren't cheap...

    Adam

  5. #15
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    Dec 2020
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    Quote Originally Posted by buffo View Post
    You may want to reach out to Semrock. They have a wide selection of optical coatings and they will also do custom coatings in small lots.

    I worked with them a long time ago to create some custom dichros with a very narrow cuttoff to allow mixing of 642nm red with 660 nm red. I suspect they'd be able to create a custom-coated F-Theta lens for you that would be appropriate for 405 nm, even in lots of 1 to 4 pieces, but I will warn you that they aren't cheap...

    Adam
    Looking for a professional company that can make custom lens, specially for ordering few pieces for prototyping.

    It's bizarre how f-theta lens like the ones found in laser printer are almost nonexistent in the optic industry, I guess it's specifically for custom made products.

    I'm thinking it would be much better (saving time and possibly money) by just ordering the "common" f-theta lens which is found everywhere on eBay and it's used by galvo multi axis laser scanning.

    Problem is, I need the scanning laser spot size to be accurate to 0.01mm. Is this even possible to achieve from f-theta lens?

    Thanks.

    Edit: HOLY MOLY... You have over 2 Billion posts....

  6. #16
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    "There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso

  7. #17
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    Dec 2020
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    Take a look at this laser scanning project:

    https://hackaday.io/project/21933-op...solution-laser

    It utilizes a transparent prism rather than a polygon mirror.

    The good part about this is that it can provide high resolution straight out from the box... no f-theta lens is needed.

    Guess I will have to spend a week or two, to fully understand the workings of this project since it's more cost effective and no special expensive lens is required down the road (hope I'm right).

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