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Variable Attenuators

Variable attenuators are a key element in achieving
dynamic range capability.


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Essentially, the products provide a mechanical blade that blocks the light input from the source to the sphere allowing for very precise control of sphere radiance.
The spectrally neutral blades (black or aluminum) close the port like an iris port while minimizing color shifts in the output spectrum. Labsphere offers three exception models (VAA, VAD and VAM) that represent trade-offs between automation, resolution performance and price to suit customer projects.
Attenuator designs also include flat and asymmetric blades that enhance dynamic range.