Category Archives: Engineering notes

Bridging the Gap Between Research Protocols and Consumer Devices

Photobiomodulation research is conducted in dose. Consumer devices are operated by time. Open almost any PBM paper and you’ll find a carefully reported protocol: wavelength, irradiance, treatment frequency, and delivered dose in J/cm². Dose is the controlled variable. It’s what researchers hold constant across subjects and what allows other groups to reproduce the work. If […]

Hardware Validated. Calibration Dialed. Dose Control Confirmed.

Thorlabs PM100D optical power meter displaying 30 mW/cm² at 805 nm during NIR LED calibration, with S121C sensor in calibration fixture and Rejuv production PCB

Three things have come together this month that, taken individually, are each meaningful progress. Together, they represent a hardware and software stack that does what it was designed to do: deliver a known, reproducible dose of light — measured in joules, not estimated. In photobiomodulation, dose — not electrical input power and not session duration […]