NS25B 25mm Bi-stable Shutters

Overview
Vincent Associates, the manufacturer of UNIBLITZ® shutters has again endeavored to provide an even more reliable
shutter product for the Photonics industry with the introduction of the 25mm aperture version of the patented N-CAS®
(Non-Contact Actuation System) shutter, the NS25B (additional patents pending on this technology). The device’s
reliability has been enhanced by significantly reducing the number of moving parts. In the 25mm aperture bi-stable
version, the NS25B, there are a total number of six moving parts, five of which are the blades themselves! The
activating mechanism is non-contact and has shown to increase its reliability through testing over similar shutter
designs.
The NS25B is a bi-stable shutter, no power is required to hold the shutter in either the open or closed state. Power is
required only to change the state of the device. There are no dimensional changes associated with this configuration
and it can be driven by the VDM1000.
Another advantage of the NS25B is the ease of which it can be installed in a customer application since the only
protruding part from the surface of the shutter are the actuator coils. The remainder of the structure is thin and flat to
allow easy integration without the concern for external moving parts.
The NS25B can be actuated by user supplied driver circuits or the VDM1000, a new driver built specifically to take
advantage of the NS25B’s low power requirements. This new driver will permit the NS25B to operate with virtually
identical open and close times.
When gating high intensity light sources, the NS25B can be equipped with reflective blades. This option protects the
shutter blades from the light source’s damaging effects by reflecting the energy away from the blade surface. Three
standard reflective blade options are available - “S” (reflective stainless steel), “Z” (AlSiO) and “ZM” (AlMgF2).
The standard shutter is terminated by a 5-pin male connector with 6 inch cable assembly. The 510A cable is required
when controlling the NS25B with the VDM1000. This cable is included with the VDM1000. There is an access slot
located above the actuator that will allow for manual operation of the shutter if so desired.

FEATURES
• Patented N-CAS® actuator system radically reduces moving parts.
• Easily configured for bi-stable operation.
• Simple design provides maximum clearance around the aperture.
• Machined flat surfaces for easy integration into virtually any system.
• Small form factor, 25mm aperture, 2.250 inch overall diameter.
• Reflective blades available.
• Electronic synchronization now available.

Electrical
COIL RESISTANCE

HOLD VOLTAGE1 (NOMINAL)

6 OHMS
1

PULSE VOLTAGE TO OPEN
+36 VDC

N/A

Voltage level required across actuator coil when being held in the open position. Hold voltage not required for Bi-