77374 Oriel Filter Wheel

The Newport / Oriel Filter Wheels and Controllers are available in both manual and motorized configurations.

Manual Filter Wheels

The economical manual filter wheels eliminate the inconvenience of continually inserting and removing filters from a filter holder. The 77368 Filter Wheel holds eight (1 inch) filters. A conveniently located top knob rotates the wheel and indicates the filter in position. Each filter is positioned in the aperture by a spring loaded detent. The 77368 has a 1/4-20 tapped hole for rod mounting, in addition to 1.5 Inch Series flanges. The 77369 and 77370 Filter Wheels hold five filters. The selection is made by turning a knurled wheel at the top of the filter housing. This allows easy access when the unit is in the middle of an optical train. A metal disk with absorptive paint is included with the filter wheel for zero referencing.

Motorized Filter Wheels

Each Motorized Filter Wheel has five filter positions. 1/4-20 mounting holes are provided for rod mounting. A DC motor drives the wheel, and Hall effect sensors detect which filter is in use. Filter selection can be made by a push button keypad on top of the controller, a remote control keypad, by externally applied TTL signals or through an LPT port. Filter interchange time is ~1 s for adjacent filters, and ~2 s if bidirectional selections are made. Remote control of the filter wheel is easy. TTL signals can be used to simplify automated initialization and filter selection. A TTL signal moves the filter wheel to the next filter. Add a second TTL signal and you can control the direction of rotation. TTL signals are accessed via BNC connectors on the back of the controller. The LPT compatible port provides additional interactive control. Filter positions can be selected or queried and may simplify multiple wheel configurations.