Laser Beam Expanders

Lambda/Ten Optics laser beam expanders provide superior system wavefront and, therefore, low divergence output. These reflective, off-axis, non-obstructing laser collimating telescopes are manufactured in four standard output beam diameters: 100, 150, 200, and 250 millimeters.

The entering laser beam is expanded by a convex secondary spherical mirror (cooled or silicon optics versions available) and directed towards a concave elipsoidal primary mirror which collimates the expanded beam. The wavefront is fully aberration corrected and achromatic by this traditional Dall-Kirkham configuration.

• Laser Beam Expanders may be used in:
• Interferometers
• Laser machining (cooled or silicon optics versions available)
• Collimation of Laser harmonics
• Laser beam divergence measurements
• Lidar systems
• Beam condensing
• Remote sensing
• Propagation studies

An all-reflective beam expander provides performance from the ultraviolet all the way through the visible and infrared regions. No focusing or color correction is required - there are no lenses in the design. The transmission efficiency of the system is determined by the reflectivity of the optical coatings. With only two optical surfaces, these beam expanders are adaptable for complex applications which might involve: multiple laser wavelengths, harmonic generators, high power laser energy (cooled or silicon optics versions available), large aperture needs. Reflective systems may be aligned and tested at the He-Ne wavelength and used with confidence in the UV and IR regions.

The top of the line housing is tubular aluminum construction with nearly uniform cross section to minimize thermal distortion. Standard mirrors are fabricated from ultra-low-expansion ceramic, although metal secondary mirrors are an available option. These systems are rugged and self-supporting. Micrometer focusing is provided which will allow divergence correction and beam focusing at a distance.

All Lambda/Ten systems are quality certified with spectral reflectivity curves and wavefront interferograms.

• Aperture Diameter: 100, 150, 200, 250 millimeters beam output.
• Wavefront Accuracy: 1/5 wavelength peak to valley at .63 microns over 100% of the aperture diameter (Certified by computer reduced phase shifted interferogram.)
• Wavefront Slope Error: 5 microradians maximum
• Mirror Surface Quality: 60-40 primary, 40-20 secondary
• Mirror Material: Schott Optical Glass - Zerodur (silicon for high power applications)
• Coating Reflectivities: Four standard coatings are available (others on request). - Each system certified by spectral reflectivity curve.
• Standard Coating Specification: MIL-M-13508C - hardness, adherence, temperature and humidity protected aluminum and silver.

• Custom magnifications
• Spacially filtered output beams
• Increased wavefront accuracy
• Larger apertures
• Custom reflective coatings
• Silicon and Water-cooled metal secondary mirrors
• Metering rod athermallized focus

Laser Beam Expander (LBX) Models

Model	Diameter	Length	Weight	Magn.	Input Diam	Output Diam	Beam Sep
LBX 100 - 6X	8 in.	29 in.	25 lbs.	6X	0.66 in.	3.96 in.	2.83 in.
	203 mm	736 mm	11.4 kg		17 mm	100 mm	72 mm
LBX 100 - 10X	8 in.	29 in.	25 lbs.	10X	0.39 in.	3.96 in.	3.06 in.
	203 mm	736 mm	11.4 kg		10 mm	100 mm	78 mm
LBX 100 - 20X	8 in.	29 in.	25 lbs.	20X	0.20 in.	3.96 in.	3.23 in.
	203 mm	736 mm	11.4 kg		5 mm	100 mm	82 mm
LBX 150 - 10X	10 in.	40 in.	45 lbs.	10X	0.60 in.	5.91 in.	4.29 in.
	254 mm	1016 mm	20.5 kg		15 mm	150 mm	109 mm
LBX 150 - 15X	10 in.	40 in.	45 lbs.	15X	0.39 in.	5.91 in.	4.45 in.
	254 mm	1016 mm	20.5 kg		10 mm	150 mm	113 mm
LBX 150 - 20X	10 in.	40 in.	45 lbs.	20X	0.30 in.	5.91 in.	4.53 in.
	254 mm	1016 mm	20.5 kg		7.5 mm	150 mm	115 mm
LBX 150 - 30X	10 in.	40 in.	45 lbs.	30X	0.20 in.	5.91 in.	4.61 in.
	254 mm	1016 mm	20.5 kg		5.0 mm	150 mm	117 mm
LBX 200 - 10X	12 in.	51 in.	80 lbs.	10X	0.79 in.	7.87 in.	4.89 in.
	305 mm	1295 mm	36.4 kg		20 mm	200 mm	125 mm
LBX 200 - 20X	12 in.	51 in.	80 lbs.	20X	0.39 in.	7.87 in.	5.17 in.
	305 mm	1295 mm	36.4 kg		10 mm	200 mm	131 mm
LBX 200 - 40X	12 in.	51 in.	80 lbs.	40X	0.20 in.	7.87 in.	5.3
	305 mm	1295 mm	36.4 kg		5.0 mm	200 mm	135 mm
LBX 250 - 10X	16 in.	68 in.	140 lbs.	10X	0.98 in.	9.84 in.	6.30 in.
	406 mm	1727 mm	63.6 kg		25 mm	250 mm	160 mm
LBX 250 - 20X	16 in.	68 in.	140 lbs.	20X	0.49 in.	9.84 in.	6.65 in.
	406 mm	1727 mm	63.6 kg		12.5 mm	250 mm	169 mm
LBX 250 - 40X	16 in.	68 in.	140 lbs.	40X	0.25 in.	9.84 in.	6.82 in.
	406 mm	1727 mm	63.6 kg		6.25 mm	250 mm	173 mm

Lambda/Ten Optics