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Operation of the Optosplit
3 Operation of the Optosplit
The Optosplit is an intuitive device, with a single control for adjusting image separation (blue arrow in fig
7) to allow different sized samples to be used. There are additional controls for defining the field of view,
and image centering which depend on the type of aperture fitted to the Optosplit. The figure below
shows the Optosplit fitted with the rectangular aperture, and its size is adjusted using the pair of levers
indicated by the yellow arrows. If an iris diaphragm is supplied, this is adjusted by rotation of a single lever
in the same location.
Figure 7 : Control positions for aligning the two images
3.1 Adjusting the position of the images.
Once the camera is set up it is useful to familiarise yourself with the operation of the alignment
adjustments. Please note that the diagrams below indicate the images for a system using an appropriately
aligned and centred rectangular diaphragm, if your system has an iris diaphragm then the images will be
shaped accordingly. An image similar to that shown below will be observed when the Optosplit is first
used, with the two images superimposed.
Figure 8 : Superimposed images on aligned system
When the camera is mounted correctly (as described in section 2 above) the knurled screw facing
the camera will control the horizontal image separation (blue arrow in fig.7 above), and together with the
aperture levers these are the only controls that will be routinely adjusted during experiments. The
remaining controls on the top-plate all adjust the alignment and centring of the two images and should
not be adjusted unless the filter set has become mis-aligned.
Note: Do not adjust any top plate controls until you are familiar with the basic operation of the
Optosplit and you have referred to section 3.2 as realignment is not trivial.
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