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+44(0)1795 590140   www.cairn-research.co.uk

S e t   u p   g u i d e

OPTO

SPLIT 

II 

Optosplit II: Key controls table

Control

Description

V1

Vertical adjustment for the shorter wavelength image

V2

Vertical adjustment for the longer wavelength image

H2

Horizontal adjustment for the longer wavelength image

Split

Separates the two images horizontally.
Always turn ANTI-CLOCKWISE for optimal image separation

Component mounts

Drop-in positions used to insert a variety of different components into 
the light path of either the shorter (reflected) wavelength or longer 
(transmitted) wavelength image. These include:
• 

Shutter plate: used to physically block one of the channels 

when utilising ‘single-channel’ mode
• 

Neutral density (ND) filter: useful when one image is dispropor-

tionately brighter than the other
• 

Corrector lens: used to reduce chromatic aberration and en-

sure both pathways are focussed on the camera sensor

Trim

Corrects vignetting, which is characterised by one image appearing 
darker towards one edge. See the ‘Image Optimisation’ section.

Longer (transmitted)
wavelength channel

Shorter (reflected)
wavelength channel

Summary of Contents for OptoSplit II

Page 1: ...email sales cairn research co uk tech cairn research co uk 44 0 1795 590140 www cairn research co uk S e t u p g u i d e OPTOSPLIT II...

Page 2: ...er Cube and towards the beamsplitter correct for Chroma mirrors please refer to us if using filters from a different manufacturer Then simply replace and tighten the locking ring Installing Dichroic M...

Page 3: ...gently and firmly The filter cube mount will now be visible The mount attached to the rear of the Cairn Filter Cube is de signed to mate with the bracket on the internal wall of the Optosplit II so th...

Page 4: ...d line up with the edges of the aperture and should not have any rota tion or slant in either direction If your software can display a rectangular ROI then the image of the aperture can be aligned to...

Page 5: ...positions used to insert a variety of different components into the light path of either the shorter reflected wavelength or longer transmitted wavelength image These include Shutter plate used to phy...

Page 6: ...nterest tightly so that the two images are located as closely as possible on the camera chip Adjusting the Position of the Images Although the camera can be sensibly orientated in any of four rotated...

Page 7: ...Gently move the slider until the vignetting is eliminated If the slid er is moved too far then the vignetting will become apparent on the other image and will need to be adjusted in the opposite dire...

Page 8: ...st the Trim control to remove any vignetting B Blocking the longer wavelength path Suitable if only the shortest wavelength channel is required Leave the Cairn filter cube in place and block the long...

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