VS25 25mm Optical Shutter


Current Lead Time: 4 – 5 weeks

Expedites are subject to availability and will be approved upon order confirmation.


Current Lead Time: 4 – 5 weeks

The Uniblitz VS25 has been designed to provide accurate, repeatable exposures for a wide variety of applications. The VS series shutters have been successfully field tested in microscopy, video imaging, PMT protection, and photographic applications worldwide. The VS25 is available in a housed or un-housed configuration for OEM applications (or simply where spatial limitations are a consideration).

Uni-stable shutter devices, like the VS25, require power to hold the blades in the open state (though the device can be custom-configured for “normally open” operation).

As of May 1, 2019, the 7-pin Female Mating connector is no longer included with purchase. Purchase 7-pin Female Mating Connector.

*The “For use in Vacuum” option will equip the shutter with encapsulated coils for vacuum levels up to 10-6 Torr. The housing, connector, and electronic sync options cannot be selected from the product builder when “For use in Vacuum” is applied as these options are not vacuum compatible and may cause outgassing. For higher vacuum-rated applications, or questions, please contact us.


Key Features

  • 25mm aperture
  • Uni-stable operation
  • Small, slim form-factor
  • RoHS Compliant
  • Transfer time on opening: 3.0 milliseconds
  • Total opening time: 6.0 milliseconds
  • Configured for the VCM-D1 Shutter Driver



For additional technical information please see the VS25 Optical Shutter Datasheet.

Coil Resistance Pulse Voltage to Open Hold Voltage 1 (Nominal)
12 OHMS +65 VDC +5 VDC


Weight Unhoused Weight Housed Operating Temp. Max. Opening Bounce Max. Closing Bounce Max. Freq. of Operation 2 Number of Shutter Blades
2.05 oz
(0.06 kg)
10.22 oz (0.29 kg) 0 – 80 °C 15% 5% 10.0 Hz / 40.0 Hz 2


1 Voltage level required across actuator coil when being held in the open position.
2 (Continuous/Burst) Continuous frequency rating specified at shutter’s minimum exposure pulse. Burst frequency rating specified for four (4) seconds maximum with one (1) minute minimum between bursts.


Electronic Synchronization System

[columns] [span7]The Electronic Synchronization System provides a feedback signal (through the driver utilized) after the shutter transfers to the open state. The system incorporates an infrared emitting diode, an infrared sensitive detecting transistor, and an interrupting vane. The vane is attached to the shutter so as to block the light path between the emitter and detector in the closed position. When the shutter transfers to the 80% open position, the vane is removed from the infrared light path, allowing the emitter to switch the detector to the active state. No connection to the designated synchronization pins when no electronic sync. is selected.


Shutter Timing


The question regarding enhancement of shutter speed with the application of user supplied lubricants has been repeatedly asked. It is our experience that lubricating the shutter blades will actually slow the shutter down and eventually render the shutter inoperable. Under no circumstances should any type of lubricant be applied to the shutter blade area.



VS25 (w/ VCM-D1 and Teflon® coated blades) Time (msec.)
0-A:     Delay time on opening after current is applied 3.0
A-C: Transfer time on opening 3.0
0-C: Total opening time 6.0
C-E: Min. dwell time with min. input pulse 2.0
B-F: Min. equivalent exp. time 6.0
E-G: Transfer time on closing 5.0
A-G: Total window time 10.0
MET: Min. exposure time 6.0
TEP: Typical exposure pulse >8.0



Technical Drawings


Uniblitz VS14 Technical Drawing (Housed)


Uniblitz VS14 Technical Drawing (Unhoused)

Connector Layout

Uniblitz VS14 Technical Drawing (Connector Layout)



VS25 Datasheet Download


3D Models
VS25 3D Models (Housed, unhoused, normally open – STEP files included in ZIP) Download

Additional information

Driver Compatibility




Blade Option


Electronic Sync.




For use in Vacuum*



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