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  • How To: Design a Bahtinov Mask
    A focusing mask is a device placed over the aperture of a telescope to aid achieving perfect focus. All focusing masks operate by the same principle; the mask geometry causes the incoming light to diffract which generates a diffraction pattern at the eyepiece. This diffraction pattern is sensitive to the telescope focus, so you focus … Read more
  • Diffraction Simulator
    Diffraction Simulator is a computer program I wrote to simulate the diffraction pattern generated by a focusing mask or secondary mirror obstruction in telescopes. I was inspired to write it after attempting to design my own Bahtinov mask, when I realised I needed a method to simulate the diffraction pattern generated by the mask. You … Read more

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