|LST4WBK2 Laser Shutter Specifications|
|Aperture Diameter||4.0 mm|
|Typical Beam Diameter used for Specs||2.0 mm|
|Maximum Shutter Repetition Rate||10 Hz|
|CW and Quasi-CW Optical Power Handling||25 W Au Mirror – 50 W Dielectric|
|Typical Damage Threshold, Aligned Polarization||1 J/cm2 Au – 3 J/cm2 Dielectric
(PW = 5 ns)
|Delay to Begin Opening after Command Open||3 ms|
|Opening Time Switching Speed||3 ms|
|Delay to Begin Closing after Command Close||6 ms|
|Closing Time Switching Speed||6 ms|
|LST4WBK2 Laser Shutter Specifications|
|Minimum FWHM Exposure Capability||30 ms using CX4000B|
|Thermal Power Dissipation Holding Open||3 W (5 V)|
|Thermal Power Dissipation, Repetitive Cycling||5 W @ 5 Hz|
|Nominal Magnetic Winding Impedance||8 Ohms|
|Cable/Wire Type and Length||18 inches, 6 leads 22 g|
|Mounting Surface for Thermal Sinking||Bottom Threaded Surface|
|Position Sensors||Standard, TTL Logic, Require 5 V|
|Size (see mechanical drawing)||3.00 x 1.50 x 0.75 inches|
|Note: 3-D solid model available upon request (Solidworks or .stp file)
Specifications updated on March 30, 2021
This LST4WBK2 laser shutter model is designed for use as a laser safety interlock and for slow processing applications. The magnetic system allows use from 12 or 24 VDC based circuits. Position sensors are built-in standard, yielding logic outputs for both open and closed states. Dielectric mirrors are available for common wavelengths, providing optical power handling to 50 W. Very low out-gassing materials are used in the construction.
Compatible system controllers are CX4000B or user-built circuits designed around 24 VDC.
Options are available using a suffix code system. Many options cannot be installed after manufacture, so choose carefully. Standard mirror is gold for IR use. The –AL suffix is for aluminum mirror, best for UV and visible. The –D123 mirror is a triple line YAG mirror for 355, 532, 1064 nm. The –C2 suffix is for CO2 use. Unit is not designed for upside down operation (w/r to photo), but can be adjusted for this orientation upon request. Other options upon request.
Special Considerations for this model include careful attention to mounting around high magnetic fields, such as Faraday Rotators. The position sensors are TTL logic, so standard handling precautions for electronic static control should be observed.
Restricted use for this model include specific laser wavelengths matching mirror options listed on serial label, high quality thermal mounting, and adequate hold voltage at user’s maximum temperature.
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.
|Aperture Size Range||3 mm to 4 mm|
|Optics||Aluminum, Dielectric, Gold|
|Wire Length||Any length|
|Wire/Cable Type Wire Gauge||Teflon, Vinyl|
|Connector||Any 6 pin connector|
|Size||3.00 x 1.50 x 0.75 in., note: minimal size change can be designed|
Note: 3-D solid model available upon request (Solidworks or .stp file)
|Number of Wire Leads, Std.||Six, 22 g|
|Cable or Wires – Length||18 inches|
|Cable/Wire Termination||MTA-100, AMP, P/N 643813-60|
|Recommended Controller and Voltage Present||Capacitor Discharge 12-24 V, 12-24 V PWM, or CX4000B|
|Shutter Winding Resistance||8 Ohms Nominal|
|Gravity Considerations||Symmetric Open/Close speed with base down|
|Typical Minimum Hold Open Voltage, Room Temperature||4 V|
|Typical Hold Open Power Dissipation as Heat||3 W|
|User Power Supply Notes||24 V, 3 A Rating, Surge Capacitor on output|
|User Drive Circuit/Cap Discharge||12 V, C = 4700 uF, R = 10 ohm 24 V, C = 2200 uF, R = 30 ohm, Flyback diode 1N4001 BUILT-IN|
|Nominal Winding Inductance||10 mH|
|User Drive Circuit/PWM Type||Boost Open – 24 V for 10 ms, Hold Open – 5 V, Delay Close 10 ms, Brake Close – 24 V for 1 ms|
|Color Codes and Function of Wires||PIN 1 White, + to winding|
|PIN 2 Black, – to winding|
|PIN 3 Red, Supply Regulated +5.0 VDC — 30 mA|
|PIN 4 Yellow, NC Output from Sensor – TTL (reads high when shutter closed)|
|PIN 5 Orange, NO Output from Sensor — TTL (reads high when shutter open)|
|PIN 6 Blue, 5V Return and Sensor Ground|
Read sensor outputs with reference to the blue ground wire. These outputs are totem-pole buffered TTL, seeking a load of ~10 K ohms. Typical output is 4 V. Do not try to draw more than about 5 mA from the Yellow or Orange Outputs, or the voltage will load down.