Wide+field+camera+flat+field+light+box

The Wide field camera required a flat filed light box due to the optics and size of chip. The Dome will get one in the future.

There are 4 x high intensity LED's in each corner in series with a 1.2K ohm resistor to reduce the current.

A 10K ohm pot is inlcuded for trimming. This is located on the underside of the box on the main terminal box where the cabling meets.

The box (thin ply) is lined with white foamex. This is the same material used for the sheeting of the observatory.

The white front sheet is 5mm white perspex.

The suppy (9V psu) is powered on only when the CCD is powered on via the USB I/O panel.

The box is mounted so that the flat light screen is square onto the telescope in the parked position. A shroud gives some protection from dew when the roof is open.