Aerospace Shutters

For over 40 years Brandstrom Instruments has designed and manufactured Self-Restoring, Momentary Rotary Solenoid actuated Advanced Optical Shutters, Aircraft Instrumentation, and Aircraft indicators.

Rotary drive shutters used to filter or attenuate various wavelengths in dual band and fused imaging applications.

A1071 nonuniformity correction shutter A1072 Electro-optical payload filter shutter
A1074-1 Cubesat Photometer shutter A1090 Electro optical filter shutter
A1074-1 Filter Shutter
Lens: ø 4.25 mm
Rotation: 35° CCW
Solenoid: ø 7/16"
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A1090 Filter Shutter
Lens: ø .450"
Rotation: 60° CW
Solenoid: ø 7/16"
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A1071 Shutter
Blade: .781" x .931"
Rotation: 50° CW
Solenoid: ø 7/16"
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A1072 Filter
Lens: ø .4"
Rotation: 50° CCW
Solenoid: ø 7/16"
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Our Aerospace Shutters block apertures from 1mm to several inches in diameter. We can customize power, travel, mountings, blade dimensions, hall effect magnets and many other features to your exact specifications.

Blade Type
  • Flat
  • Cylindrical
  • Pocket Machined
  • Profiled
Blade Material
  • Carbon Fiber
  • Aluminum
  • Stainless Steel
  • Filter Materials
Blade Finish
  • Black Anodized
  • Electroless Nickel
  • Diffuse Gold Plate
  • Painted
  • Thermal Absorptive
  • Low Emissivity
  • Specialty coatings


VSI TCAS warning indicator

Our Heritage in Aviation Systems

From 1972 until the late 1990s, our core business was in power failure warning indicators for analog aircraft instrumentation. We have served, and in some cases continue to produce legacy products for the markets and programs listed at right.

These rotary solenoid-actuated devices, which are designed to be MIL STD 810 G compliant and have successfully completed independent verification testing, reliably alert pilots to changes in circuit conditions as they occur during flight.

Specified for their compact size, low power consumption and high resultant force, these indicators provide autonomous advance warning of system malfunction and potential unsafe or hazardous conditions.

New Uses for Warning Indicator Technology

Indicators have a variety of automatic hazard detection and warning uses in the commercial electronics, industrial automated production line and quality control equipment where accuracy is paramount.

If you have a need for an indicator, consider the failsafe properties of electromechanical rotary solenoids and contact Brandstrom Instruments.


  • Boeing
  • Airbus
Radiation warning indicator

General Aviation

  • Cessna
  • Learjet
  • Gulfstream
TCAS RA OFF warning indicator


  • Black Hawk
  • B1-B
  • F-14, F-15, F-16,
  • A-10
VMO Warning Indicator


  • The Space Shuttle