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.

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 25 mm or 35 mm 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 certain frequencies up to 40 Hz for the 25 mm version and 20 Hz for the 35 mm model. While the 25 mm 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. A small adjustment in frequency will normally correct this.

Because the shutter blade is stopped by the action of the motor rather than mechanical stops, SmartShutter® units tested for over 100 million cycles show no sign of failure. The standard SmartShutter blade is made of untreated aluminum. Non-reflective coatings are available upon request and are not recommended for use with arc lamps.

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 25 mm and 35 mm 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.

  • Robust design
  • Life tested to 100 million cycles
  • Modular repairable design
  • Opening time 8msec from trigger (for 25 mm and 35 mm versions)
  • Continuous operation frequencies as high as 40 Hz
  • Stand-alone or use with Sutter filter wheel
  • Mountable in Lambda LS, Lambda DG-4/DG-5, and Lambda XL
  • 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
  • Patent No. 7,253,575


5.5 in x 8.5 in x 2.325 in / 14 cm x 21.6 cm x 6 cm

1.7 lbs / 0.77 kg

100/240 Volts
50/60 Hertz power line
75 Watts max

RoHS Compliant

IQ25 and IQ35 CE Certificate

IQ50 CE Certificate

US Prices > Controller
International prices vary by country. Please contact your local distributor or Sutter Instrument for a quotation. Prices subject to change without notice.

Catalog Number Description Price
LB10-B/IQ1 Lambda 10-B controller, serial and USB cables, power cord and manual $ 1,925
LB-SC Lambda SC controller, serial and USB cables, power cord and manual $ 948

US Prices > SmartShutter®

Catalog Number Description Price
IQ12-SA 12.5 mm SmartShutter® with stand-alone housing $ 1,296
IQ12-AN 12.5 mm hard anodized SmartShutter® $ 1,405
IQ25-SA1 25 mm SmartShutter® with stand-alone housing $ 1,367
IQ25-W2 25 mm SmartShutter® with housing to fit filter wheel $ 1,367
IQ25-WU 25 mm SmartShutter® to retrofit non-shuttered filter wheel $ 1,422
IQ25-LS 25 mm SmartShutter® with housing to fit Lambda LS $ 1,978
IQ25-DG 25 mm SmartShutter® with housing to fit Lambda DG-4/DG-5 $ 1,834
IQ35-W 35 mm SmartShutter® with housing to fit filter wheel $ 1,925
IQ35-SA 35 mm SmartShutter® with stand-alone housing $ 1,925
IQ50-SA 50 mm SmartShutter® with stand-alone housing $ 1,925

1 Where vignetting may be an issue, we recommend the 35 mm shutter
2 For upgrading a 25 mm filter wheel with existing Uniblitz® shutter to SmartShutter®
3 Compatible with Lambda SC controller

Mounting adapters for Nikon, Zeiss, Leica and Olympus microscopes are available. Please see the Microscope Adapters page or contact Sutter Instrument for pricing and further information

US Prices > Accessories

Catalog Number Description Price
FSWITCH Foot switch with BNC connector - Changes state of shutter with foot press as long as foot press is maintained $ 120
FSTOGGLE Foot switch with BNC connector - alternates open/close with each foot press $ 120
CIQ-2 25 pin connector to two 9 pin connectors (Allows connection of one stand-alone SmartShutter®) $ 120
W620005 9 pin male/female serial cable $ 40
W621520 USB cable $ 40

US Prices > Mounting Posts
Stainless steel 1/2 in diameter. One end is 1/4-20 (M6) tapped hole. Other end is #8-32 (M4) removable threaded stud. Can be used with 25 mm SmartShutter® or 35 mm when used with PMA-IQ35.

Catalog Number Description Price
O620120 1 in / 25 mm long post $ 24
O620122 1.5 in / 38 mm long post $ 24
O620123 2 in / 50 mm long post $ 24
O620124 3 in / 76 mm long post $ 24
O620117 4 in / 100 mm long post $ 24
O620119 8 in / 203 mm long post $ 24
PMA-IQ35 35 mm post mount adapter $ 120
Post Holder
O620125 1 in / 25 mm holder and spring loaded thumbscrew for mounting post $ 24
O620130 2 in / 50 mm holder & spring loaded thumbscrew for post $ 24
O620134 4 in / 100 mm holder & spring loaded thumbscrew for post $ 24
O620136 6 in / 152 mm holder & spring loaded thumbscrew for post $ 24
Post Base Plate
Suitable for Imperial or Metric tables, posts, and post holders
O620143 1 in x 2.3 in x 3/8 in base plate $ 24
O620140 2 in x 3 in x 3/8 in base plate $ 24
Post Collar
O620150 Slip-on collar, 1 in OD x 0.5 in ID $ 24

Microscope Adapters
Lambda LS
Lambda DG-4
Lambda SC
Lambda 10-3
Lambda 10-B

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