Laser Components submersible laser modules emit at 520 or 635 nm

Flexpoint HD laser modules are robust enough to withstand sandstorms and be submerged in 1-m-deep water for up to 30 min. They are available as dot lasers, line lasers with fan angles from 10° to 100°, or cross-hair lasers with fan angles from 2° to 60°. They emit at 520 or 635 nm.
Laser Components
Bedford, NH
www.lasercomponents.com