– Spectral coverage
The standard model of GEMINI covers the range 250 nm – 2300 nm. There is the option of upgrading it to cover a much broader region (250 nm – 3500 nm).
On request, GEMINI can be customized to cover the 500 nm – 4200 nm range.
Moreover, currently NIREOS is developing a special version of GEMINI, which can work up to 15 microns. Stay tuned for updates on this version!
You can select one out of two versions of the driver that controls the relative delay between the two generated replicas of light (“standard” and “high performance – HP”). With respect to the standard controller, the HP version guarantees a higher speed of the scan (up to 5 time faster: it typically takes 15-20 millisecond per step in a step-scan mode) and a much higher accuracy and stability in the relative delay (on the order of 1 attosecond – that is more than 1000 times better than the optical cycle of visible light). This ultimately translates into a much better signal to noise ratio of the retrieved spectrum of your signal.
When GEMINI is coupled to SPAD, APD or PMT detectors and TCSPC systems to detect time-resolved and very weak signals, we always recommend to go for the HP version.
– Spectral resolution
You can select one out of two versions (S, L) with different spectral resolutions:
Please note that this is the minimum achievable spectral resolutions for each version; if sometimes you do not need such a good spectral resolution, you can perform shorter – and thus faster – scans (these parameters can be easily selected via software) and get a worse spectral resolution.