email: sales@cairn-research.co.uk tech@cairn-research.co.uk
+44(0)1795 590140 www.cairn-research.co.uk
9) One channel is slightly out of focus (chromatic aberration)
Observations & likely cause
• One channel is slightly out of focus compared to the other.
• Chromatic aberration results when the focal length changes depending upon the wavelength and
is predominantly introduced by the objective lens. When imaging two wavelengths simultaneously,
the phenomenon is
observed
using the OptoSplit II, rather than being caused by it.
Resolution
• The OptoSplit can be supplied with a Corrector Lens kit as an additional accessory.
• Three weak crown glass lenses are typically supplied, labelled as follows:
• IO137: Focal length 1346mm
• IO138: Focal length 2019mm
• IO139: Focal length 4034mm
• The corrector lenses are mounted in the auxiliary drop-in holders provided with each kit.
• Finding the correct lens is a process of trial and error. We recommend starting with the weakest
lens (IO139) in the out of focus channel.
• For further assistance on chromatic correction or multi-depth imaging, please contact us.
For all technical support, please contact our support team
tech@cairn-research.co.uk or call us on 01795 590 140
