LIST OF ADAPTERS FOR THE FLUOWAT LEAF CLIP Set of adapters for the FluoWat leaf clip, to couple with: miniPAM fibre optic, a standard SMA-905 terminated fibre optic, or a collimating lens for fibre optics. Other adapters can be manufactured under request. Setup of SMA-905 adapter for optical fibre illumination to the main port (trough filters) 

Setup of collimating lens adapter for optical fibre illumination to the main port (trough filters). The adaptor has a UNF 3/8”-24 thread that fits commercially available collimating lenses (not included). Collimating lenses can augment the light intensity over the measuring spot in the leaf, at the expense of reducing the illuminated area. Current design ensures that the measuring area is fully illuminated by the collimating lens when using a measuring fibre with 0.22 numerical aperture, but any misalignment might result in loss of signal. It might be necessary to adjust the focus of the collimating lens. Collimating lenses are not provided with the FluoWat clip, and the user should make sure that alignment a focus are properly set. Common commercially available collimating lenses are: 74-series from OceanOptics, or COL-VIS from Avantes, but any other with the same thread would fit. 

Setup for an additional SMA-905 fibre attached at the back port An additional SMA-905 fibre optic at the back port of the clip can be used for: 1) spectral measurement of specular reflection and fluorescence at 45°. An additional spectrometer (or a multiplexer) might be needed to make measurements simultaneous simultaneously with the nadir view. It is possible to use the same fibre for top (nadir) and back (specular) measurements, but the adapter does not have a shutter included, so the user must make sure to place a light-tight cover. 2) additional unfiltered light, e.g. to provide saturating pulses that complement passive fluorescence measurements. The SMA-905 adapter at the back port can be also used with direct sun illumination on the main port. 

Setup for miniPAM conection through the back port. MiniPAM can be used to measure active and passive fluorescence simultaneously, and/or to produce saturating pulses to complement passive fluorescence measurements. The only limitations being that it cannot record leaf temperature nor PAR, since these sensors are located in miniPAM’s clip and cannot be removed. However, you can estimate PAR from the Fluowat measurements of the white reference. Other custom adapters can be manufactured under request.