LST500 Laser Shutter

Optical Specifications

Aperture Diameter	15 mm
Typical Beam Diameter	1 – 12 mm
Maximum Optical Power Handling	100 W (Dielectric Optics) (+50 W Requires Water Cooling), 30 W (Gold and Al Optics)
Optics Options	Gold, Aluminum, or Dielectric
Dielectric Optics Suffix	-1 (1064nm), -2 (532 nm), -3 (355 nm)
Metal Optics Suffix	CO2 (-C2), STD (-AL)
Laser Induced Damage Threshold	2 J/cm² at 10 ns (Dielectric Optics) 500 mJ/cm² at 10 ns (Gold/Al Optics)

Performance Specifications

Open Delay Time	10 ms
Open Rise Time	20 ms
Open Total Time	30 ms
Close Delay Time	10 ms
Close Fall Time	20 ms
Close Total Time	30 ms
Min. FWHM Exposure	50 ms
Max. Shutter Repetition Rate	10 Hz (Custom – 15 Hz)
Lifetime	Over 100 Million Cycles

Thermal Specifications

Thermal Power Dissipation Holding Open	5 W
Thermal Power Dissipation, Cycling	16 W @ 10 Hz
Max. Operating Temperature	50 C
Mounting Surface	Datum A, Datum B

Custom Options

Optics Options	Gold, Aluminum, or Dielectric
Dual Position Sensors	Available
Custom Repetition Rate	Up to 15 Hz
Diverting Port to Power Meter	Available

Electrical Specifications

Power Supply	24 VDC, 2 AMP RATING
Electrical Drive Circuit	Boost Open = 24 V for 30 ms Hold Open = 8 V Delay Close = 17 ms Brake Close = 24 V for 6 ms
Recommended Controller	CX4000B
Winding Resistance	11 ohms @ Room Temp.
Winding Inductance	25 mH
Position Sensors	Logic TTL, Require 5 VDC @ 30 mA
Cable/Wire Type, No., Length, Termination	26 g Teflon, six wires, 18 in., MTA-100

Wire Pin # - Color

1 – White	Power Winding (+)
2 – Black	Power Winding (-)
3 – Red	Sensor Supply, 5 V DC(+) – 30 mA
4 – Yellow	Normally Open Sensor (HI – Open)
5 – Orange	Normally Closed Sensor (HI – Close)
6 – Blue	5 V Return and Sensor Ground

Attributes

Dimensions	5.5 in. x 0.97 in. x 2.0 in.
Weight	~1 lb.
Classification	Safety/Process
Gravity Considerations	None
Specifications Date	March 27, 2023

Description

The LST500 laser shutter model is designed for use as a laser safety interlock and processing applications. The shutter provides TTL output position sensors for the open and closed states as standard equipment. Compatible system controllers are CX4000B or user-built circuits designed around 24 VDC @ 2 A. Options are available using a suffix code system. Many options cannot be installed after manufacture, so choose carefully. Choose the –C2 suffix for CO2 laser use (see LST500-C2). Choose the –IR suffix IR use, starting at about 700 nm. The standard over-coated aluminum mirror is good from deep UV to about 700 nm (see LST500-AL). Special dielectric mirrors are available for OEM applications. Use suffix –1 for 1064 nm, -2 for 532 nm, -3 for 355 nm, -4 for 266 nm, and -123 for 355 + 532 + 1064 nm harmonic mirror (for lower damage threshold, see LST500-123; for high pulsed laser see LST500-123-HP). 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.