Sutter Instrument Lambda 721, Руководство по эксплуатации

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LAMBDA 721 OPERATION MANUAL – REV. 1.10C (20210517)
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1.2 General Description
Figure 1-1. Lambda 721 indicators, controls, and connectors.
The Lambda 721 is a new concept for combining up to 7 separate LED cubes with different
spectra into a single common output beam. The LED cubes contain the LED, collimating
optics, and a filter. These LED cubes are easily exchanged and installed with no tools
required. Each LED cube is collimated before entering the optical path through the bandpass
filter. The filters for each LED cube also function as mirrors that reflect the collimated beams
from the previous light sources. In the diagram below the optical paths are outlined for each
position including the reflections that occur:
Traditionally, combining more than two light sources required the use of a dichroic ladder.
Dichroic mirrors, which switch from transmission to reflection at one point in the spectrum,
allow the combining of separate light sources, provided that those sources do not have
overlapping wavelengths. The downside of this approach is that light sources cannot be easily
changed. Dichroic ladders also demand careful attention to the order in which the light
sources are introduced into the optical path to avoid having the light blocked by the next
dichroic in line. Typically, additional bandpass filters must be added in front of each light
source before the dichroic, to select the desired range of wavelengths for each source. Each
filter and dichroic used in the ladder decreases the total light output of the system.