Modular Infrared Light Head
Researchers sometimes need an infrared light source for non-intrusive observation of behavior. And sometimes the subjects are small and you need to make the observations with a stereo microscope.
The SFA-LH-IR850 is an 850nm light source that is compatible with the NIGHTSEA Model SFA Stereo Microscope Fluorescence Adapter. The light head plugs directly into the lamp base supplied with the SFA system. You can acquire the light head as a supplement to the SFA system that you already own for fluorescence observation, or you can acquire it in combination with a lamp base as a stand-alone device.
The light head incorporates a high power 850nm LED and a medium beamwidth diffusing lens to create a smooth illumination area. The output is centered at 850nm with a FWHM (full width at half maximum) of approximately 50nm. There is virtually no emission at wavelengths shorter than 750nm.
The photo on the left above was taken with a conventional camera under normal room light, and with the IR light head illuminated at full power, directed at the target center from a distance of approximately 10cm (4 in.). The illumination spot is not visible either to this camera or to the naked eye. The photo on the right was made under the same lighting conditions, but with a camera that had been modified to image only infrared light.
Please note that infrared light is not visible to the human eye and to many cameras. You will need an appropriate camera to record the observations.