How to choose the most suitable version of GEMINI for my application?

– 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!

– Speed
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.