Why THORLABS Redstone OSA305 software cannot find any instrument?
- SSteven ReedAug 7, 2025
If the THORLABS Measuring Instruments software, ThorSpectra, doesn't detect the instrument, it might be because the instrument was connected after the software started. To resolve this, click the āConnect Devicesā button in the Instrument menu to search for connected instruments. Also, verify that WindowsĀ® has detected the instrument in the āDevice managerā under the WindowsĀ® Control panel, looking under āThorlabs devicesā (you may need to select āShow hidden devicesā). If WindowsĀ® hasnāt detected it, ensure the instrument is on and connected to the PC with a USB cable that supports high-speed USB 3.0 (or USB 2.0 for OSA20xC models). If still not found, check the USB cable connection or reboot the instrument.















