Beam Path Laser Puzzle

Steer the laser beam to every detector. Place and turn mirrors, beam splitters, and wave plates, and work around the beam blocks. 36 levels, from a single mirror to polarization optics.

Tap an empty square to place the selected piece, tap it again to turn it, and once more to pick it up. Long-press or right-click a piece to pick it up at once. Pieces on a gray base are fixed; a curved arrow means it turns but can’t move. With a keyboard, the arrow keys move between squares, Enter or Space acts like a tap, R turns, Delete picks up, 1–4 choose a piece, and U or Ctrl+Z undoes. In the polarization levels, ticks across the beam mean it is polarized in the plane of the table (p) and dots mean perpendicular to it (s). Where beams overlap, their powers simply add (the game ignores interference). Your progress is saved in this browser.

The optics