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Instead, each of the targets uses a tripwire made from a laser pointing at a photocell. When the ping pong ball enters the target, it breaks the beam. This triggers a solenoid to eject the ball ...

It’s all about wanting to do target practice, indoors, using a simple red laser dot instead of any sort of projectile. While it’s possible to practice by flashing a red laser pointer and ...

The reusable target board shown here enables the power and energy distribution of the high-energy laser beam to be accurately measured with high spatial and temporal resolution. Disclaimer ...