Optical stimulation

Maximum power, homogeneity and stability provided by the interchangeable OSL unit

Optical stimulation

All lexsyg smart and lexsyg research TL/OSL readers can be equipped with an interchangeable OSL unit containing up to three stimulation wavelengths. These are provided by high power stimulation elements optionally as LEDs or laser diodes. The integration of photo diodes provides the feedback for power control of each individual element, guaranteeing a stable stimulation source, independent of element aging.

LED/laser diodes stimulation

Available stimulation wavelengths:

(LED/laser diodes)
UV (365 nm), Violet (405 nm), Blue (458 nm), Green (525 nm), Yellow (590 nm), IR (850 nm)

Modes of operation for OSL

  • Continuous Wave OSL (CW-OSL)

  • Linear Modulated OSL (LM-OSL)


Select up to three wavelengths per OSL unit:

LED stimulations:

Module# L0403 – Blue LED stimulation 458 ± 5 nm (max. 100 mW/cm² at sample position)
Module# L0404 – IR LED stimulation 850 ± 20 nm (max. 300 mW/cm² at sample position)
Module# L0405 – Green LED stimulation 525 ± 20 nm (max. 80 mW/cm² at sample position)
Module# L0406 – Yellow LED stimulation 590 ± 30 nm (max. 50 mW/cm² at sample position)

Laser diode stimulation:

  • Rise/fall time: < 10 ns

  • ON-Time: 50 ns to continuous wave


Module# L0407 – Blue laser diode stimulation 445 ± 3 nm (max. 100 mW/cm² at sample position)
Module# L0408 – IR laser diode stimulation 850 ± 3 nm (max. 300 mW/cm² at sample position)
Module# L0409 – Violet laser diode stimulation 405 ± 3 nm (max. 100 mW/cm² at sample position)