Optical Power: 1-300 W
Aperture Size: 14 mm
Switching Speed: 40 ms
Optics: Dielectric Options
High Energy Pulses
Laser Safety Interlock
This model is designed for use primarily as a safety interlock shutter for YAG and similar solid-state lasers with high Q-Switched energy per pulse. It uses dielectric optics from world-leading coating suppliers, providing damage thresholds of 5 J/cm2 at 355 nm to 15 J/cm2 at 1064 nm for low ns laser pulses. The redirected energy is diffused thru UV grade fused silica, then absorbed inside the shutter. The 40 msec switching speed allows it to extract single pulses from lasers pulse trains up to 10 Hz. Closing settling time depends on orientation w/r to gravity. For fastest closure, use the CX4000B controller PCB.
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 1.000” round dielectric optics on 1 mm substrates are used from major industry suppliers. Mirrors are bonded into moving assembly. Use suffix –1 for 1064 nm, -2 for 532 nm, -3 for 355 nm, -4 for 266 nm, and –12 for 532+1064 harmonic mirror (lower damage threshold). Use –C2 for CO2 use. Additional mirrors are available for specific laser lines. Contact our application engineers. Referring to the plane of the Base Plate, CX4000B controller can be calibrated for horizontal or vertical calibration. Horizontal is the default (as shown in product photo). Circuits not using dampening on closure will generate longer settling times for closure spec, up to 100 msec maximum.
Special Considerations for this model include precautions to use proper laser with installed mirror, and add chiller plate accessory for loads over 50 watts. Beam tube abutment to input/output is typical; back-scatter is a little higher on this model than on others due to compact thickness.
Restricted use for this model include mirror choice compatible with laser, and observance of gravity mounting orientation for critical timing applications.
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 Diameter||14.0 mm|
|Typical Beam Diameter used for Specs||10.0 mm|
|Maximum Shutter Repetition Rate =||3 Hz|
|CW and Quasi-CW Optical Power Handling||300 W chiller plate|
|Typical Damage Threshold, Aligned Polarization||5-15 J/cm2|
|Delay to Begin Opening after Command Open||10 ms|
|Opening Time Switching Speed||40 ms|
|Delay to Begin Closing after Command Close||10 ms|
|Closing Time Switching Speed||40 msec using CX4000B,
100 msec w/o dampening
|Minimum FWHM Exposure Capability||60 msec using CX4000B|
|Thermal Power Dissipation Holding Open||6 W|
|Thermal Power Dissipation, Repetitive Cycling||15 W @ 3 Hz|
|Nominal Magnetic Winding Impedance||8 Ohms|
|Cable/Wire Type and Length||6 Ft Cable, PVC Jacket Cable|
|Mounting Surface for Thermal Sinking||Base Plate or Bottom Output Aperture|
|Position Sensors||Independent Open/Close Micro-Switches Std.|
|Weight||2.5 lbs. with cable|
|Size (see mechanical drawing)||1.00 x 4.00 x 6.00 Inches + Base Plate|
|Aperture Size Range||14mm to 15mm|
|Optics||Aluminum, Coated aluminum, Dielectric, and Gold|
|Wire Length||Any length|
|Wire/Cable Type Wire Gauge||6-C CABLE|
|Connector||Any 6 pin connector|
|Size||4 x 6 x 1 in., note: minimal size change can be designed|
Note: 3-D solid model available upon request (Solidworks or .stp file)
Electrical Drive Data
|Number of Wire Leads, Std.||Six, 22 g|
|Cable or Wires – Length||Cable, 6 feet, PVC Jacket|
|Cable/Wire Termination||Flying leads|
|Recommended Controller and Voltage Present||Capacitor Discharge 24 V, 24 V PWM — or our CX4000B Controller|
|Shutter Winding Resistance||8 Ohms Nominal|
|Gravity Considerations||Heavy Optics. Mounting Orientation will affect amount of power used to open.
Not designed for upside-down mounting.
|Typical Hold Open Power Dissipation as Heat||6 W|
|User Power Supply Notes||24-28 V, 3 A Rating, Surge Capacitor on output|
|User Drive Circuit/Cap Discharge||24-28 V, C=15000 mmF, R=50 ohm, Use Flyback diode 1N4001|
|Nominal Winding Inductance||25 mH|
|User Drive Circuit/PWM Type||24-28 V for 70 ms, then drop to 7 V hold, Use N4001 Flyback|
If an LSTXYW8 (supplied with cable/flying leads) and controller CX2450B (obsolete) were purchased separately, attach wires of shutter to the cable as shown below. The CX2450B must be labeled for mechanical switch option and LSTXYW8 shutter type.
|LSTXYW8 WIRE COLOR||CX2450B CABLE COLOR||FUNCTION|
|White||White||+ Power to Winding|
|Black||Black||– Power to Winding|
Standard Shutter Format, Mechanical Microswitches for Position Sensors:
|Shutter Wire Color||Function|
|White||+Power to Winding|
|Black||-Power to Winding|
|Red/Orange Pair||Open Switch, Reads Continuity when Shutter Open|
|Blue/Green Pair||Closed Switch, Reads Continuity when Shutter Closed|
Switches rated for 1 A at 24 VDC.