The first task was to further develop our Star-Chamber, and this took time and effort to sort out (thanks Tony Barry).
Star Chamber consists of a cardboard tube with the control electronics mounted on the tube itself.
Early experiments used fibre optics to deliver the light to the right hand tube plate. Later experiments mounted the LEDs in a bush in the tube plate with the light shining through a 0.5mm aperture
A Pentax 50mmf4 macro lens is mounted in the left hand tube plate and focused the light onto the test camera’s CCD chip.
The electronics was designed to vary the intensity of the LED over time in synchronisation with the V-Sync pulses inherent in CVBS video.