CS45 45mm Optical Shutter


Current Lead Time: 8 – 10 weeks



Current Lead Time: 8 – 10 weeks

The Uniblitz CS45 has been designed to provide accurate, repeatable exposures for a wide variety of applications such as telescopy and aerospace. The slim form-factor provides a large 45mm aperture that can be inserted into a 4.00 inch diameter housing. The CS45 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 CS45, 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.

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

  • Large 45mm aperture
  • Uni-stable operation
  • 5-bladed design
  • Slim form-factor
  • RoHS Compliant
  • Transfer time on opening: 14.0 milliseconds
  • Total opening time: 20.0 milliseconds
  • Configured for the VCM-D1 Shutter Driver



For additional technical information please see the CS45 Optical Shutter Datasheet.

Coil Resistance Pulse Voltage to Open Hold Voltage 1 (Nominal)
12 OHMS +70 VDC +7 VDC / +5 VDC 2


Weight Unhoused Weight Housed Operating Temp. Max. Opening Bounce Max. Closing Bounce Max. Freq. of Operation 3 Number of Shutter Blades
3.17 oz
(0.09 kg)
9.15 oz (0.26 kg) 0 – 80 °C 15% 5% 2.5 Hz / 15.0 Hz 5


1 Voltage level required across actuator coil when being held in the open position.
2 Dual hold voltage system included in VCM-D1 Driver
3 (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 CS45, 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.


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.



CS45 (w/ VCM-D1 and Teflon® coated blades) Time (msec.)
0-A:     Delay time on opening after current is applied 6.0
A-C: Transfer time on opening 14.0
0-C: Total opening time 20.0
C-E: Min. dwell time with min. input pulse 12.0
B-F: Min. equivalent exp. time 31.0
E-G: Transfer time on closing 24.0
A-G: Total window time 50.0
MET: Min. exposure time 25.0
TEP: Typical exposure pulse >25.0



Technical Drawings


Uniblitz CS45 45mm Optical Shutter Drawing (Housed)


Uniblitz CS45 45mm Optical Shutter Drawing (Unhoused)

Connector Layout

Uniblitz CS45 45mm Optical Shutter Drawing (Connector Layout)



CS45 Datasheet Download


3D Models
CS45 3D Models (Housed, unhoused, normally open – STEP files included in ZIP) Download

Additional information

Driver Compatibility




Blade Option


Electronic Sync.




For use in Vacuum*