Aperture Diameter | 8.0 mm |
Typical Beam Diameter | 2.0 to 6.0 mm |
Maximum Optical Power Handling | 50 W (Dielectric Optics) |
Optics Options | Gold, Aluminum, or Dielectric |
Dielectric Optics Suffix | 1064 nm (-1), 532 nm (-2), 355 nm (-3), 266 nm (-4), 532/1064 nm (-12) |
Metal Optics Suffix | CO2 (-C2), IR (-IR), STD (-AL) |
Laser Induced Damage Threshold | 500 mJ/cm2 at 10 ns (Custom 2 J/cm2 at 10 ns) |
Open Delay Time | 5 ms |
Open Rise Time | 15 ms |
Open Total Time | 20 ms |
Close Delay Time | 5 ms |
Close Fall Time | 15 ms |
Close Total Time | 20 ms |
Min. FWHM Exposure | 30 ms |
Max. Shutter Repetition Rate | 5 Hz |
Lifetime | 50 Million Cycles |
Thermal Power Dissipation Holding Open | 4 W |
Thermal Power Dissipation Cycling | 10 W at 5 Hz |
Mounting Surface for Thermal Sinking | Datum A, Datum B |
Aperture Size Range | 8 mm, 10 mm, 8 x 12 mm Obround |
Optics Options | Gold, Aluminum, or Dielectric |
Wire Length | Any Length |
Wire/Cable Type Wire Gauge | Teflon or Vinyl |
Connector | Any 6-pin Connector |
Identification | Engraving, Labels |
Power Supply | 24 VDC, 1 Amp Rating |
Electrical Drive Circuit | Boost Open = 24 V at +45 ms Hold Open = 7 V Delay Close = 8 ms Brake Close = 24 V for 6 ms |
Recommended Controller | CX4000B |
Winding Resistance | 15 ohms Nominal |
Winding Inductance | 10 mH |
Position Sensors | Logic TTL, Require 5 VDC @ 30 mA |
Cable/Wire Type, No., Length, Termination | 22 g, six wires, 18 in., MTA-100, AMP, P/N 643813-60 |
User Drive Circuit/Cap Discharge | 24 V, C=4700 mmF, R=50 ohm, use Flyback Diode 1N4001 |
User Drive Circuit/PWM Type | 24 V for 50 ms, then drop to 7 V hold, use Flyback Diode 1N4001 |
1 – Red | Power Winding (+) |
2 – Black | Power Winding (-) |
3 – Violet | Sensor Supply, 5 VDC(+) – 30 mA |
4 – Yellow | Normally Open Sensor (HI – Open) |
5 – Orange | Normally Closed Sensor (HI – Close) |
6 – Blue | 5V Return and Sensor Ground |
Dimensions | 3.80 in. x 2.06 in. x 0.64 in. |
Weight | ~4 oz. |
Classification | Safety/Process |
Gravity Considerations | Symmetric Open/Close speed with base down. More power used for upside-down mounting |
Specifications Date | April 29, 2021 |
The LST400 laser shutter model is designed for use as a laser safety interlock and processing applications. The LST400 provides TTL output position sensors for the open and closed states as standard equipment. The thin body style and 8 mm aperture accommodate many popular laser sources. 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.
Choose -C2 for CO2 laser use (see LST400-C2). Choose the –IR suffix for IR use, starting at about 700 nm. The –IR suffix replaces the over-coated aluminum mirror with gold. The standard over-coated aluminum mirror is good from deep UV to about 700 nm (see LST400-AL). Special dielectric mirrors are available for OEM applications (see LST400-123). Cable options are also available, call for details.
Special considerations for this model include damage threshold assessment. The shutter is not designed for high energy, low repetition rate, Joule-level Q-switched lasers. See LST800 for these applications. Thermal mounting must be given strong attention if optical power dissipation is near the upper limit of the rating. For high-speed processing, consider the LST200SLP.
Restricted use for this model is only limited to damage threshold and wavelength considerations. It can be used in any orientation with regards to gravity; more symmetric switching in standard mounting. 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.