OptoMask
Cairn Research LtdAdjustable field mask for region selection For many years we have offered a movable variable rectangular field stop. This was initially designed to mask a region of interest within the field of view of a microscope in order to make localised intensity measurements with a photomultiplier. Subsequent evolutions of the device have formed an integral part of our OptoSplit image splitters to mask a region to be projected to both ha…