Motorized Zoom Beam Expander

For automated applications, Special Optics developed motorized versions of our zoom beam expanders.  Our Motorized Zoom beam expanders combine our proprietary 5 lens-element optical designs from our manual zoom beam expanders, with built-in adjustment motors for controlling lens groups.  With our motorized systems, both expansion ratio and focus can be controlled  independently from a remote location via controller electronics and software running on the Windows platform and LabView. 

Special Optics Motorized Zoom beam expanders typically employ a proprietary 5 lens-element design with 3 lens groups to reduce the internal focus.  Also, we use fused silica lenses on the two input groups.  As a result, high damage thresholds can be achieved.

Beam wander is critical in any zoom lens so we employ a proprietary “rail” design which allows for minimal beam wander while maintaining diffraction limited performance over the entire expansion range.  Custom designs have been built which produced wander of less than 0.1 mrad.

With Special Optics Motorized Zoom beam expanders, variable magnification levels can automatically be set ranging from 2X-8X, 2X-10X, 1X-4X, and 1X-5X.  This variability helps to reduce machine set up times and provides flexibility to equipment for a wide range of jobs. Laser protection class is also maintained as continuous opening of the machine is no longer required. 

These beam expanders are also ideal for general laboratory research. 

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Specifications:			Features
Expansion Range	2x-8x Continuous or 1x-4x continuous		RS232 Serial interface One motor control box Default expansion settings pre-programmed User-controlled focus adjustment Users can define custom expansion settings Compact 2" outside diameter for standard optical mounting Windows compatible Developed in LabViewTM GUI (.DLL) can be addressed from C++ or other languages (1-4X Beam Expander Only.) Design Diffraction-limited design 5 element design reduces internal focus Continuous zoom and focus adjustments Mechanicals specifically designed to minimize beam wander
Input Aperture	10mm Max
Output Aperture	30mm
Beam Wander	0.15 mRad  for 1-4X Beam Expander 0.3 mRad for 2-8X Beam Expander
Wavefront Distortion	<1/4 Wave @ 633 nm
Usable Wavelength Range	see table below
Field of View	+ / - 0.5 Degrees
Transmission	>95%
Damage Threshold UV & VIS-NIR models	<100 MW/cm2
Damage Threshold IR (CO2) models	20 kW/cm2 pulsed wave, 1kW/cm2continuous wave
Expansion Change Time	< 5 seconds
Usable Temperature Range	-10 to +50 Celsius

Model Number	Standard Wavelength Ranges	Mechanical Drawings	Availability
VIS-NIR 56C-30-2-8X-λ VIS-NIR 56C-30-1-4X-λ	450-675, 600-900, 800-1200, 1100-1600 nm		Call Call
UV 61C-30-2-8X-λ UV 61C-30-1-4X-λ	248-425 nm		In Stock for 355nm Call
IR (CO2) 53C-30-2-10X-λ IR (CO2) 53C-30-1-5X-λ	9.3 or 10.6 um		Call Call

Please replace λ in model number with working wavelength when ordering.