Optical Power Handling: 6 W
Aperture: 4 mm
Switching Speed: 8 ms
Position Sensors
Optics: Broadband

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Optical Shutter
Biotech Exposures
500 Million Cycles
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Optical Specifications

Aperture Diameter 4.0 mm
Typical Beam Diameter used for Specs 2.0 mm
Maximum Power Handling 6.0 Watts
Custom Optics Aluminum or Gold optics
Typical Damage Threshold Standard – 30 mJ/cm^2 @ 10 ns
Custom – 300 mJ/cm^2 @ 10 ns

Performance Specifications

Open Delay Time 2 ms
Open Rise Time 3 ms
Open Total Time 5 ms
Close Delay Time 2 ms
Close Fall Time 3 ms
Close Total Time 5 ms
Min. FWHM Exposure 15 ms
Max. Repetition Rate 30 Hz

Thermal Specifications

Thermal Power Dissipation Holding Open 4.5 W
Thermal Power Dissipation, Cycling 6 W @ 25 Hz
Mounting Surface Datum A

Custom Options

Optics Aluminum or Gold Optics
Wire Length 2 feet maximum
Connector Any 9-pin connector
Identification SN engraving, SN / PN Labels

Electrical Drive

Power Supply 24 VDC, 1 A rating
Electrical Drive Circuit Boost Open 24V @ 5ms
Hold Open 10 V
Delay Close 2 ms
Brake Close 1 ms
Winding Resistance 22 ohms Nominal
Winding Inductance 10 mH
Position Sensors 2 Phototransistor, 5V TTL logic
Cable/Wires Type, No. and Length 26 AWG, 9 wires, 18 in.
Cable/Wire Termination 9-pin Molex 0050579409
Recommended Controller and Voltage Present CX4000B or 24V / PWM

Wire Pin # - Color

1 – Red Shutter Power (+)
2 – Black Shutter Power (-)
3 – Green Case Ground
4 – Violet LED Anode (Open Sensor)
5 – Brown LED Anode (Close Sensor)
6 – Yellow LED Common Ground
4 – White Collector (Open Sensor)
5 – Orange Collector (Close Sensor)
6 – Gray Emitter Common Ground


Dimensions 2.10 in. x 0.4 in. x 1.35 in.
Weight ~6 oz.
Classification Optical/Process
Gravity Considerations None
Specifications Date July 18, 2023


The LST200-F40 model is our smallest optical shutter featuring two positions sensors and a 4 mm aperture. This model is designed for use as a fast process shutter and quick reaction safety interlock. The inherent speed is achieved with efficient electrical power requirement. The F40 can be used in applications that operate continuously and has been proven to perform without failure beyond a half a billion cycles. The flexing motion is achieved using our patented technology for highest reliability. The solid copper package efficiently manages thermal flow, rapidly transferring the heat load to the mounting surfaces.

Our optical shutters and laser shutters are optimized for use with our CX4000B shutter driver or user-built circuits designed around 24 VDC. The user-built circuit can be a typical current driver based around 24V or 24V / PWM drive circuit, although choice of controller / user circuit can affect the shutter’s switching speeds and bounce control.

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.

The F40's Input Aperture face is the ideal thermal mounting surface for high heat loads. Alternatively, the bottom surface can be used for low-moderate heat loads. Restrictions for this model include proximity to high magnetic fields and strict observance of optical power rating. Large size particle contamination could inhibit blade motion causing failure to open or close.