NS65B 65mm Optical Shutter


Current Lead Time: 4 – 5 weeks


Current Lead Time: 4 – 5 weeks

The Uniblitz NS65B is a 65mm-aperture bi-stable optical shutter utilizing our patented N-CAS® technology. The NS65B’s simple design provides maximum clearance around the aperture, and a machined flat surface makes for its easy integration into telescopes, video cameras, etc. The NS65B has an overall diameter of 5.15 inches, and an electronic synchronization is available (by special order).

Bi-stable shutter devices, like the NS65B, require no power to hold the blades in either the open or closed state.

*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

  • 65mm aperture
  • Bi-stable operation
  • Only two unique moving parts
  • Slim, low-profile form-factor
  • RoHS Compliant
  • Transfer time on opening: 33.0 milliseconds
  • Total opening time: 43.0 milliseconds
  • Can be configured for the VED24 or VDM1000 shutter drivers.



For additional technical information please see the NS65B Optical Shutter Datasheet.

Coil Resistance Pulse Voltage to Open Hold Voltage
12 OHMS 1 +18 VDC 2 N/A


Weight Operating Temp. Max. Opening Bounce Max. Closing Bounce Max. Freq. of Operation 3 Number of Shutter Blades
4.94 oz (0.14 kg) 10 – 50 °C 15% 5% 1.0 Hz / 3.0 Hz 6


1 Two 24 OHM coils wired in parallel
2 Peak voltage as provided by the VED24 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

[columns][span7]This sync schematic illustrates the wiring for the NS65B. The schematic also shows the two 24 Ω coils wired in parallel to provide an equivalent resistance of 12 Ω.

Presently, the NS65B does not include a synchronization system as a standard option. Pins 3, 4, and 5 have no connections at this time. The synchronization feature may be available by special order if it is required for your application. Please contact us to discuss your request in further detail.

[/span7][span5]Uniblitz NS65B Schematic [/span5][/columns]


Shutter Timing

[columns] [span5]timing-diagram-white

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.



NS65B (w/ VDM1000 and Teflon® coated blades) Time (msec.)
O – A:     Delay time on opening after current applied 10.0
A – C: Transfer time on opening 33.0
O – C: Total opening time 43.0
C – E: Min. dwell time with min. input pulse 15.0
B – F: Min. equivalent exp. time 47.0
D – E: Delay time on closing after current applied 12.0
E – G: Transfer time on closing 31.0
A – G: Total window time 79.0
MET: Min. exposure time 70.0
TEP: Typical exposure pulse >70.0



Technical Drawing

Uniblitz NS65B Technical Drawing



NS65B Datasheet Download


3D Models
NS65B 3D Outline Model (STEP included in ZIP) Download

Additional information

Driver Compatibility


Blade Option


Electronic Sync.

For use in Vacuum*


Flying Leads

No, Yes