Optical Power Handling: 2 W
Aperture Size: 2.3 & 3 mm Option
Switching Speed: 1 ms
Lifetime: Billions of Cycles
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Optical Shutter
High-Speed Processing
Highest Reliability
Biotech Exposures
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Optical Specifications

Aperture Diameter 2.3 mm
Typical Beam Diameter 1.0 mm
Max. Optical Power Handling 2 W
Optics Options Aluminum or Gold Optics
Typical Damage Threshold Standard: 30 mJ/cm2 @ 10 ns;
Custom: 300 mJ/cm2 @ 10 ns

Performance Specifications

Open Delay Time 2 ms
Open Rise Time 1 ms
Open Total Time 3 ms
Close Delay Time 1 ms
Close Fall Time 1 ms
Close Total Time 2 ms
Min. FWHM Exposure 2.5 ms
Max. Shutter Repetition Rate 100 Hz
Lifetime Billions of Cycles

Thermal Specifications

Thermal Power Dissipation Holding Open 4 W
Thermal Power Dissipation Cycling 10 W at 100 Hz
Mounting Surface Datum A, Datum B

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
Identification Engraving, Labels

Electrical Drive

Power Supply 24 VDC, 1 Amp Rating
Electrical Drive Circuit Boost Open – 24 V @ 4 ms
Hold Open – 10 V
Winding Resistance 22 ohms Nominal
Winding Inductance 10 mH
Cable/Wire Type, No. and Length 22 g PVC, 2 leads, 18 in. twisted pair
Cable/Wire Termination Flying
Position Sensors Not Available
Recommended Controller and Voltage Present Capacitor Discharge 24 V, 24 V PWM, or CX4000B
User Drive Circuit/Cap Discharge 24 V, C = 330 mmF, R = 25 ohm, use 1N4001 Flyback diode, and 12-36 V Zener
User Drive Circuit/PWM Type 24 V for 5 ms, then drop to 10 V hold, use above described flyback arrangement


Dimensions 2.10 in. x 0.38 in. x 1.35 in.
Weight ~4 oz.
Classification Safety/Fast Processing
Gravity Considerations None
Specifications Date Jan. 10, 2022


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.