The Lambda 10-2 is a microprocessor controlled, high speed filter wheel. Its impressive speed coupled with exceptionally smooth operation make the Lambda 10-2 ideal for research applications involving fluorescence microscopy, ratio imaging, spectrophotometry, visual physiology, or any application requiring rapid and accurate aperture positioning.

The Lambda 10-2 controller, which has both serial and parallel interfaces, will drive up to two filter wheels and two shutters. Each wheel can hold up to ten optical filters (25mm in diameter and up to 9mm thick ) which are easily loaded through an access port on the housing. 

Additional filters (e.g. heat and/or neutral density filters) may be inserted manually at two other locations in the optical path. The optical ports on both sides of the unit are internally threaded as C-mounts (32 threads per inch). When mounted in an upright position, the center of the optical port can be positioned from 11cm to 53cm above the mounting surface. Slide-in filter holders are optionally available for inverted configurations. A second wheel can be added to the system with no need for additional mechanical or electronic changes.

Eight user selectable speeds are provided. Filter to adjacent filter time can be set from 55 to 1200msec, depending on the number and the weight of the filters mounted in the wheel. Integral shutter drivers will open the optional shutter in 10msec.

The use of a direct drive stepper-motor with advanced micro stepping technology and intelligent acceleration and deceleration algorithms assures the fastest possible moves for a given inertial load, while minimizing vibrations. The controller also has an error detection and correction circuit in the event that a position error occurs. The controller system is designed around three embedded controllers; one slave for each wheel and a master for control and communication. The embedded controllers automatically detect the equipment installed and the source of the external commands, so there are no jumper wires or switches to set.