LST200SLP High-Speed Optical Shutter

Optical Specifications

Aperture Diameter	2.3 mm
Typical Beam Diameter	<1.5 mm
Max. Optical Power Handling	2 W
Damage Threshold	30 mJ/cm^2 @ 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. Exposure Time	5 ms
Max. Shutter Repetition Rate	100 Hz
Lifetime	Billions of Cycles

Thermal Specifications

Open Power Dissipation	4 W
Cycling Power Dissipation	10 W at 100 Hz
Mounting Surfaces	Datum A, Datum B

Custom Options

Larger Aperture	3 – 4 mm
Higher Rep Rate	200 Hz (1 ms Open/Close)
Direct Drive	12V or 5V DC
Higher Power Handling	5 W (300 mJ/cm^2 @ 10 ns)
Cable Length and Connector	Any length + connectors

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, see LST200-F40
Recommended Controller and Voltage Present	CX4000B or Capacitor Discharge 24 V, 24 V PWM
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

Attributes

Dimensions	2.10 in. x 0.38 in. x 1.35 in.
Weight	~4 oz.
Classification	Safety/Fast Processing
Gravity Considerations	None
Specifications Date	Sept. 24, 2025

Description

The LST200SLP high-speed optical shutter model is designed for use as a fast processing 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. Compatible system controllers are CX4000B or user-built circuits designed around 24 VDC. The solid copper package efficiently manages thermal flow, delivering the heat to the mounting surfaces. 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 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