Optical Filter Changer
P E C S > L
A M B D A 1 0 - 2
(for Lambda 10-232)
Controller 16in x 11in x 3.5in
41cm x 28cm x 9cm
Filter wheel 5in x 5in x 2.25in
13cm x 13cm x 6cm
50/60 Hertz power line
Lambda 10-2 is the ideal choice for researchers whose applications are
intolerant of electrical noise. The low-noise linear electronics of the
controller assure that only DC voltages are present on the motor windings
when the wheels are not moving.
The Lambda 10-2 is capable of independently operating up to two
filter wheels and two Uniblitz shutters. The reliable, smooth operation
of the Lambda 10-2 has made it highly suitable for research applications
involving fluorescence microscopy, ratio imaging, spectrophotometry, and
The controller electronics are designed around three embedded chips: 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
The Lambda 10-2 system 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.
E A T U R E S > L A M B D A 1 0 - 2
between adjacent filters
and serial interfaces
control of two wheels
integral shutter drivers
P T I O N S > L A M B D A 1 0 - 2
wheels mounted in series
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 microstepping 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 Lambda 10-2 consists of a 10-position filter wheel, a rack
mountable controller, a support base and mounting rods, a controller/filter
wheel interface cable, parallel and serial interface cables, two drop-in
filter holders, spanner wrench, and manual. Microscope adapters for most
Nikon, Olympus, Zeiss, and Leica scopes can be purchased separately.
For applications requiring absolute vibration isolation, and/or spatial
uniformity independent of wavelength, an optional liquid light guide output
is available for the Lambda 10-2 wheel. The two meter long guide
mounts directly onto the output port of the wheel. Transmission through
the guide is better than 70% from 375nm to 575nm. Adapters to connect
the light guide to your microscope port are available as an option.
The Lambda 10-232, was designed to remedy the problem of vignetting
that may occur with a 25mm filter format in certain microscope systems.
The system features a modified Lambda 10-2 controller but includes a ten
position wheel that accommodates 32mm diameter filters, up to 9mm thick.
The best filter to adjacent filter switching speed in this system is achieved
in 75 msec. A shutter for the system is optionally available. A T-mount
format is used for mounting the wheel onto your microscope. Contact Sutter
Instrument for information on available T-mount adapters.
OEM wheels available
For OEM applications, the Lambda 10-2 can readily be modified to meet
your specific requirements. By utilizing the 10-2 controller to drive
customized wheels, we can provide an economical solution to your OEM design
specification. To date we have made custom 2,3,4,5, 10 and 12 position
wheels and have designed for 50mm, 32mm and 25mm filters. Our technical
staff will be happy to discuss with you special application requirements.