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Optical Shutter
High-Speed Processing
Highest Reliability
Biotech Exposures

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LST200SLP Optical Shutter Specifications
Aperture Diameter 2.3 mm
Typical Beam Diameter used for Specs 1.0 mm
Maximum Shutter Repetition Rate = 100 Hz
CW and Quasi-CW Optical Power Handling 2 W Standard
Typical Damage Threshold Standard: 30 mJ/cm2 @ 10 ns; Custom: 300 mJ/cm2 @ 10 ns
Delay to Begin Opening after Command Open 2 ms
Opening Time Switching Speed 1 ms
Delay to Begin Closing after Command Close 1 ms
Closing Time Switching Speed 1 ms
LST200SLP Optical Shutter Specifications
Minimum FWHM Exposure Capability 5.0 ms
Thermal Power Dissipation Holding Open 4 W
Thermal Power Dissipation, Repetitive Cycling 10 W @ 100 Hz
Nominal Magnetic Winding Impedance 22 Ohms
Cable/Wire Type and Length 18-inch twisted pair, 22 g
Mounting Surface for Thermal Sinking Output Face, Bottom
Position Sensors Not Available
Weight 5 oz.
Size (see mechanical drawing) 2.10 x 1.35 x 0.38 inches
Note: 3-D solid model available upon request (Solidworks or .stp file). Contact us.


The LST200SLP high-speed optical shutter model is designed for use as a fast process optical shutter and quick reaction laser safety interlock. The inherent speed is achieved with minimum electrical power requirement. The LST200SLP is used routinely in application that operates 24/7/365, accumulating billions of cycles. It is our highest reliability product. Laser shutter controller choice affects switching speeds. The solid copper package efficiently manages thermal flow, delivering the heat to the mounting surfaces.

Compatible system controllers are CX4000B or user-built circuits designed around 24 VDC.

Special considerations for this model are primarily thermal mounting. The Output Aperture face is the ideal surface for high heat loads, and the bottom threaded surface for lower heat loads.

Restricted use for this model include close proximity to high magnetic fields and strict observance of optical power rating. Environments subjecting shutter to large size particles could inhibit shutter motion.

See the Mechanical Drawing tab for dimensions. Also see the Application Notes in the Technical Information menu for important operational issues including: thermal mounting, user-built circuits, polarization, lifetime, jitter, vacuum operation, and contamination. See the Product Matrix page to compare laser shutter models.


LST200SLP Optical Shutter Custom Options

Aperture Size Range 2.3 mm or 3 mm
Wire Length 2 ft. max
Wire/Cable Type Wire Gauge Teflon, Vinyl
Connector Any 2 pin connector
Size 2.10 x 1.35 x 0.38 inches
Identification Engraving, Labels

Mechanical Drawing

LST200SLP Optical Shutter Mechanical Drawing
Note: 3-D solid model available upon request (Solidworks or .stp file). Contact us.


Electrical Drive

LST200SLP Optical Shutter Electrical Drive

Classification Safety/Fast Processing
Number of Wire Leads, Std. Two, 22 g PVC
Cable or Wires – Length 18 inches
Cable/Wire Termination Flying
Recommended Controller and Voltage Present Capacitor Discharge 24 V, 24 V PWM, or our controller CX4000B
Shutter Winding Resistance 22 Ohms Nominal
Gravity Considerations None
Typical Minimum Hold Open Voltage, Room Temperature 8 V minimum
Typical Hold Open Power Dissipation as Heat 4 W
User Power Supply Notes 24 V, 1 A Rating
User Drive Circuit/Cap Discharge 24 V, C=330 mmF, R=25 ohm, use 1N4001 Flyback diode, and 12-36 V Zener
Nominal Winding Inductance 10 mH
User Drive Circuit/PWM Type 24 V for 5 ms, then drop to 10 V hold, use above described flyback arrangement.