Stepper-motor driven shutter
The SmartShutter™ is
designed to complement our growing line of optical products and sets a
new standard for shutter performance and reliability. In the traditional
shutter design there are two or more leaves that rub against
each other. Given time, the blades will wear down, bind, and the shutter
will fail to open. The SmartShutter™ is designed with
only one moving part, which virtually eliminates the effects of wear and
markedly improves performance. In the traditional shutter design there
is an additional issue of the leaves binding in extreme temperature conditions.
Our improved design uses heat resistant material that performs well under
very high temperature conditions, extending the life of the shutter.
E A T U R E S > S M A R T S H U T T E R ™
Life tested to 100 million cycles
Modular repairable design
Open/close time 8msec from trigger (for 25mm and 35mm versions)
Continuous operation frequencies as high as 30Hz
Stand-alone or use with Sutter filter wheel
Mountable in Lambda LS and Lambda DG-4/DG-5
Microprocessor based controller
Soft action mode provides minimum vibration
Selectable partial opening function for neutral density
Serial, USB and TTL interfaces
Manual input via keypad (on LB10-B/IQ)
Universal power supply
The SmartShutter™ incorporates
a new high-performance motor drive and precision stepper-motor to provide
added control and durability. Traditional shutters use a solenoid actuator
requiring a high initial opening voltage for rapid opening of the shutter.
This can overheat or burn out the coil of the shutter if the shutter is
opened too frequently. With our microprocessor controlled motor/wiper
design, we can control the trajectory of each move and optimize the motion
of the blade for speed or for smoothness.
The SmartShutter™, in either the 25mm or 35mm version,
operates with open/close times of 8msec from the command (3msec from the
start of motion). Since our robust design does not rely on over-driving
the windings, we can achieve continuous operation at frequencies up to
40 Hz for the 25mm version, and 20 Hz for the 35mm model. While the 25mm
SmartShutter™ can run at frequencies up to 40 Hz, at some frequencies between
30 and 40 Hz, resonances may be excited which will prevent stable operation.
Because the shutter blade is stopped by the action of the motor rather
than mechanical stops, SmartShutter™ units tested
for over 10 million cycles show no sign of failure.
The microprocessor-based controller provides
exceptional versatility and is adaptable to various modes of operation
and function. The SmartShutter™ can be programmed
for a variety of movement profiles or to produce a variable aperture by
determining the degree of shutter opening. When used in our Lambda LS
xenon light source and coupled with a liquid light guide, the shutter
acts as a programmable neutral density filter. In addition, while the
impulse of our shutter is minimal, a soft action mode can
be selected to decrease vibration.
The Lambda 10-B/IQ controller for the SmartShutter™
is capable of driving up to two shutters. To support this function a TTL input is supplied for
remote triggering of the shutter, as well as a TTL output to support remote
triggering of external devices such as a camera. The controller can also
be operated locally (manually) from the controller keypad or remotely
from a computer through either the USB or serial port.
A dedicated single shutter controller, the Lambda SC, is also available.
This unit is offered with a USB port, serial port, TTL in and TTL out. The
Lambda SC allows programmable control over the exposure time and the
delay between trigger and shutter opening.
Originally designed to be integrated into our 25mm and 35mm filter wheels,
housings are also available for stand-alone units and for use with our
Lambda LS and Lambda DG-4/DG-5 optical products. The modularity of the
SmartShutter™ assures that repairs, should they be
necessary, are simple and economical.