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LS3 3mm Laser Shutters

LS3 Laser Shutter System side view 1
LS3 Laser Shutter System side view 1
LS2 Laser Shutter System side view 2
LS2 Laser Shutter System front view
Driver Compatibility
Blade Finish
Electronic Sync
Encapsulated Coil
Model Number: LS3S2T0
Lead Time: 4-5 week lead time
List Price $725.00

This device is now RoHS compliant by default. Please contact us for further information.


Certain configurations of this device are available on Amazon:






The UNIBLITZ® LS3 series shutters are designed for high speed operation and are well suited for laser use. The LS3 features a 3mm aperture and a typical rise time of 500µsec. Applications include fiber optic switching, low level chopping, pulse gating, selection, and modulation to 200Hz. In addition, they are well-suited to precision exposure control in the areas of holography and laser switching, where the precise, repeatable characteristics of the shutter are a requirement.

The LS3 shutter is offered in either housed or un-housed configurations. The un-housed shutter allows a high degree of flexibility when mounting the unit into applications where spatial limitations are a concern. The housed version offers the installation of the shutter device in a small black anodized aluminum housing. This allows for use of available mounting options and protection of the shutter device within the application's environment.

The LS3 incorporates our unique, constant force linear actuator and can be driven with our existing drive units. Recommended drivers are listed above. These include bench top and OEM types depending on your application.

Alternate blade coatings and finishes are available. To accommodate laser energy ratings up to 5W/mm2 with “Z” or “ZM” shutter blade coating options. Two standard reflective blade options are available,“Z”(AlSiO)and “ZM”(AlMgF2).

For information on typical laser damage thresholds see Optical Shutter Comparison Chart . For further information please see our application note Laser Application Reference Sheet.

The LS3 can also be configured with the R3 high temperature option for high ambient environments.

To further enhance the flexibility of the LS3, we offer the Electronic Synchronization System. Also available are customized mounts and numerous standard mounting system options for popular microscopes and video imaging applications.


  • 3mm diameter clear aperture, dual bladed design.
  • Housed and un-housed versions available.
  • Typical open time: 500µsec.
  • Exposure repetition rates from DC - 200Hz.
  • Laser energy ratings up to 5W/mm2 with “Z”(AlSiO)and “ZM”(AlMgF2) shutter blade coating options.
  • Driver: special driver not required. Can be driven with existing VMM Series and VCM-series and specific OEM drive units.
  • A number of microscopy, video and universal mounting options are available.
  • Can be ordered with the "R3" High Temperature option.
  • Electronic synchronization system option available.
  • Normally Open configuration available by special order. Please contact us for more information.


For more information related to the LS3 Normally Open Configuration see the LSR3 Normally Open Uni-Stable Shutter Datasheet located in the Downloads Tab.


(Click to view the complete Electrical Comparison Chart)

48 OHMS +65 VDC +10 VDC

1 Voltage level required across actuator coil when being held in the open position.

Click to Enlarge

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.


(Click to view the complete Mechanical Comparison Chart)

N/A 7.41 oz. (210.07g)
0-80 o C 15% 5% 50 Hz / 200 Hz 2

2 (CONT/BURST) CONTinuous frequency rating specified at shutter’s minimum exposure pulse. BURST frequency rating specified for (4) four seconds maximum with (1) one minute minimum between bursts. Frequency measurements are taken in free air, 25°C ambient, actuator coil equipped with heat sink. For additional information on maximum sustained frequencies obtainable, please contact one of our technical representatives.


(Click to view the complete Timing Comparison Chart)

The following chart lists typical timing values (msec.) using UNIBLITZ® drive equipment and measured with UNIBLITZ® shutters equipped with standard black Teflon® coated shutter blades.

Click to Enlarge

Timing Segment Timing (msec)
0-A:                        Delay time on opening after current is applied 1.0
A-C: Transfer time on opening 0.5
O-C: Total opening time 1.5
C-E: Min. dwell time with min. input pulse 0.8
B-F: Min. equivalent exp. time 1.5
E-G: Transfer time on closing 0.6
A-G: Total window time 1.9
MET: Min. exposure time 2.0
TEP: Typical exposure pulse >2.3

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.

Click to Enlarge

Housed Style

The LS3 case style allows a number of mounting configurations. A ¼-20 threaded hole is provided for post mounting. The 1.625 in x 40 TPI external thread, rear side, and the six 2-56 threaded holes, front side, can be interfaced directly into your application or fitted with a variety of specific mounting options. See applicable mounting system options for additional information. The unit terminates with a 7-pin male connector.

Click to Enlarge

Housing/Connector Layout

This drawing illustrates 7-pin connector and 1/4-20 threaded hole layout for the LS2/3/6 series #2 case style.

Optical Blade Finish 

(Click to view the complete Optical Comparison Chart)

.3-.4µm (microns)
.4-.75µm (microns)             
.75-10.6µm (microns)
(Z) AlSiO     (ZM) AlMgF2 (Z) AlSiO    (ZM) AlMgF2 (Z) AlSiO   (ZM) AlMgF2
N/A 2.5 W/mm2 5 W/mm2 2.5 W/mm2 2.5 W/mm2 2.5 W/mm2

Blade Samples are available upon request.

Optical Shutters: Asking the Right Questions

Posted by Stephen Pasquarella - 4/13/16

Answering specific questions can help detect the need for a shutter... Read More

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News & Tradeshows

January 28 - February 2, 2017

Vincent Associates®, the manufacturer of Uniblitz® Shutter Systems, will exhibit their line of Uniblitz devices at SPIE Photonics West, Booth #615

Vincent Associates has years of experience in custom modifications as well as special electronic shutter designs. Please contact us during normal business hours to discuss your particular requirements with one of our specialists.
Hours of Operation: 
Monday - Thursday 6:00 am - 4:30 pm (EST)