This is a Python 3 script for generating Bahtinov mask design files for a laser cutter such as a GlowForge. Bahtinov masks are used in astrophotography to set the focus.

The output is an SVG file with a set of paths in blue for the mask lines, intended to be scored, and an outline path in red, intended to be cut.

This should be fabricated from a thin, transparent plastic.

The samples folder contains a sample of the default output, a 100 mm square mask with 1 mm line spacing, 20 deg mask angle, and 5 mm rounded corners.

pip3 install -r requirements.txt

./bahtinovMask.py --size <size in mm> --spacing <line spacing in mm> --angle <mask angle in deg> --cornerRadius <corner radius in mm>

Options

• --size height and width of the mask in mm. Defaults to 100 mm.
• --spacing space between the horizontal lines on the mask. Defaults to 1 mm
• --angle mask angle in degrees. Defaults to 20 deg.
• --cornerRadius rounds the corner of the mask. Defaults to 5 mm.