altThe TLS Series of software-controlled (Windows®) wavelength tunable light sources from Optometrics Corp. (Ayer, MA) can be used for detector sensitivity testing, color matching, and characterization, as well as reflectivity and absorption of different materials. Featuring a USB interface, abilities include wavelength selection from 360 to 1,000 nm and scanning between wavelengths. Bandpass output ranges from 6, 10, and 25 nm, and to illuminate specific wavelengths, a stepper motor is integrated. Manual versions also are offered.

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