{photo region}
Detent arm and location sensor
Detent reed switch sensors
Filter wheel position encoders and magnet stacks
Filte wheel 4-bit reed switch position encoders
Circuit board, mounting block, reed switch, magnets for the filter wheel encoder system
Pupil mask holder with mask and mask cover
Assembled pupil mask unit
Close-up of pupil mask in unit
Inserting pupil mask unit into second bulkhead within filter bay
Pupil masks (version 1), after photoetching CuBe sheet and spray painting
View through filter box along optical axis to pupil mask