Sutter Instrument Lambda 721, Operation Manual

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LAMBDA 721 OPERATION MANUAL – REV. 1.10C (20210517)
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from that position. This position can be used with LED’s that have broad spectral output,
such as the 561nm LED, and may allow the excitation of more than single channel of
fluorescence from a single LED. (raw spectra available upon request)

The light from position #1 goes directly to the device output without being reflected. This
position might be preferred for the source with the greatest desired output.

The filter for the seventh light source is not used as a reflective surface and could be used
with LED cubes with broader outputs.

In configurations with fewer than 7 light sources, sources should be filled from lowest to
highest number of reflections to ensure the greatest light output.

This filter is installed at 18° angle-of-incidence to the collimated beam of the LED cube.
This will cause a small shift in the band pass toward shorter wavelengths. While it would
be ideal to have a coating optimized for this application, we have found that stock -STR
filters can be used if you correct for the shift in the band pass when selecting the filters.

The Lambda optical beam combiner is designed for flexibility and expandability. Should
your illumination need change over time a simple configuration change and possibly
additional filters can produce an entirely different output.
Figure 1-3. Lambda 721 LED Spectra Options.