Wide-field filter camera.
A rugged camera with a 32 degrees field has been constructed and used to detect faint nebulosity through narrow-band interference filters. The optimum bandwidth is determined. Also the merits of using a phosphor output image tube have been examined quantitatively, and a method of cooling the tube has been derived and investigated both experimentally and numerically.
Johnson
P G
PG
Kaye
A L
AL
Meaburn
J
J