NMLaser shutters have non-contact design

NMLaser Products has announced its Flexsorb line of high-performance laser shutters incorporating a non-contact electromagnetic design and thermal dissipation.

The shutters, which will will be on display at Photonics West in January 2010, feature a high damage threshold, quick switching speed, small size and quiet operation.

The only moving part is a low-mass, flexible, ferromagnetic cantilever membrane that is moved in and out of the beam by non-contact electromagnetic techniques, reducing opening and closing shock, vibration and wear.

The non-contact flexure is designed to close at a position slightly away from the pole, essentially floating in air to eliminate any potential vibration or bounce caused by impact deceleration.

These long-life flexures are unaffected by foreign particles clinging to the magnetic pole.

Wear particulate accumulation is low, with off-the-shelf models rated for clean-room use.

All units are immersion cleaning compatible and can be provided for clean room type applications.

Slightly overdamped controllers eliminate system ring, ensuring efficient energy transfer to the magnet.

The heat from the efficient magnetic design is merged with the laser-optical absorption heat and is dissipated using thermal conduction to a common mounting surface.

The built-in beam dump absorbs high CW power levels with damage resistance from high-fluence pulsed lasers.

Engineered materials, geometry and surface morphology give low backscatter from DUV through FIR wavelengths.

Units are designed for use with 24-V-type circuits with a timed impulse to open and a lower voltage for long-term hold.

Position sensors, both logic circuit and mechanical switch, are offered on most models.

Aperture sizes range from 3 to 14mm.

Fast-switching speeds target OEM safety interlock and processing application requirements, ranging from under 10 to 50msec for larger apertures.

Semi-customisations for apertures, body geometry or optical mirror and absorber requirements are also available.

The range can be adapted to meet a variety of applications and optimised for specific OEM product lines.

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