CS25 25mm Optical Shutter


Current Lead Time: 6 – 8  weeks



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The Uniblitz CS25 has been designed to provide accurate, repeatable exposures for a wide variety of applications including microscopy, video imaging, and more. The slim form-factor provides a 25mm aperture that can be inserted into a 2.37 inch diameter housing. The CS25 is available in a housed or an un-housed configuration for OEM applications (or simply where spatial limitations are a consideration).

Uni-stable shutter devices, like the CS25, require power to hold the blades in the open state.

A normally open configuration of this device is available by special order. Please contact us for more information.

*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
  • Slim, small form-factor
  • 510A cable included
  • RoHS Compliant
  • Transfer time on opening: 9.0 milliseconds
  • Total opening time: 12.0 milliseconds
  • Configured for the VCM-D1 Shutter Driver


For additional technical information please see the CS25 Optical Shutter Datasheet.

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


Mechanical Specifications
Weight Unhoused 1.28 oz (0.04 kg)
Weight Housed 3.16 oz (0.09 kg)
Operating Temp. 0 – 80 °C
Max. Opening Bounce 15%
Max. Closing Bounce 5%
Max. Freq. of Operation 2 5.0 Hz / 30.0 Hz
Number of Shutter Blades 5


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

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. For the CS25, this system uses a similar activation flag attached to the mechanism, which triggers a reflective emitter/detector device. No connection to the designated synchronization pins when no electronic sync. is selected. [/span5][/columns]

Shutter Timing

timing-diagram-whiteNote: Lubricating the shutter blades will slow the shutter down and eventually render the it inoperable. Under no circumstances should any type of lubricant be applied to the shutter blade area.


CS25 (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 9.0
0-C: Total opening time 12.0
C-E: Min. dwell time with min. input pulse 6.0
B-F: Min. equivalent exp. time 17.5
E-G: Transfer time on closing 14.0
A-G: Total window time 29.0
MET: Min. exposure time 15.0
TEP: Typical exposure pulse >15.0


Technical Drawings


Uniblitz CS25 Technical Drawing (Housed)


Uniblitz CS25 Technical Drawing (Unhoused)

Connector Layout

Uniblitz CS25 Technical Drawing (Connector Layout)


CS25 Datasheet Download


3D Models
CS25 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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