Resilient Filter Wheel Coupling
Original Publication Date: 1978-Apr-01
Included in the Prior Art Database: 2005-Feb-20
A filter wheel assembly 1 comprises a filter wheel 2 having a circular variable filter mounted therein extending 180 Degrees around the wheel. A transparent shaft encoder 3, mounted next to filter wheel 2, includes a plurality of edge markings for use in determining the angular position of the circular filter wheel 2 and hence the particular wavelength being transmitted at any given time. Filter wheel 2 and encoder 3 are mounted on a hub 4. A pair of rubber bushings frictionally engage opposite faces of wheel 2 and encoder 3. A flange 5 is located opposite to hub 4, and a bolt 7 is threadedly received in a bore in hub 4 and connects parts 2-6 together.