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Laser Beam Expanders

Laser Beam Expanders
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500 Phone: 1-800-222-6440 • Fax: 1-949-253-1680 O p t i c s TECHNICAL REFERENCE AND FUNDAMENTAL APPLICATIONS CYLINDRICAL AND SPHERICAL LENSES LENS SELECTION GUIDE SPECIALTY LENSES PRISMS MIRRORS OPTICAL SYSTEMS OPTICS SETS T81-20X T81-3X T81-10X T81-30X • 3x to 30x • Galilean optical design • Ideal for use with HeNe lasers • Wavefront distortion less than ë/4 • Transmission greater than 95% Our Laser Beam Expanders provide a low cost means of focusing and shaping laser beams with a high degree of accuracy. These Galilean beam expanders incorporate the highly regarded Tropel optical designs with improved adjustability and mounting. They are ideal for applications in which a small spot must be formed at some distance from the laser, or where the collimation range must be extended for illumination, or for alignment of distant objects. Wavefront distortion of less than ë/4 guarantees a minimum focused spot size even at long ranges. The lenses are antireflection coated with magnesium fluoride optimized for 632.8 nm, yielding transmission of over 95%. Four expansion ratios are available, 3x, 10x, 20x, and 30x, each with a means for continuous focus change. As the power increases, the beam divergence decreases proportionately, providing a greater collimation range. These beam expanders can be conveniently attached to most HeNe lasers with the 1-32 accessory thread and except for the T81-3X, are equipped with precision beam centering adjustments to compensate for slight decentrations of the entering laser beam. Specifications Design wavelength 632.8 nm (480–1100 nm with reduced transmission) Input Beam Diameter 1.0 mm maximum Wavefront Distortion < ë/4 on axis at 632.8 nm Antireflection Coating Broadband single-layer MgF2 centered at 632.8 nm Transmission T > 95% at 632.8 nm Mounting 1.0 in. x 32 TPI (model ULM, ULM-TILT) see page 699 Damage Threshold 100 W/cm2 CW, 2J/cm2 with 10 nsec pulses, typical Ordering Information Model Expansion Ratio Entrance Aperture (mm) Exit Aperture (mm) Focus Range (m) T81-3X 3x 3 6 1 to ‡ T81-10X 10x 1.5 12 2 to ‡ T81-20X 20x 1.5 25 4 to ‡ T81-30X 30x 1.5 32 30 to ‡ T81-3X 32.0 MIN 35.6 MAX ø 30.2 ø 28.4 1.000-32 THD 6.4 T81-10X 79.5 MIN 85.6 MAX ø 43.9 1.000-32 THD 6.4 ø 37.3 T81-20X 150.6 MIN 163.3 MAX ø 43.9 ø 50.8 6.4 1.000-32 THD T81-30X ø 44.5 62.6 13.3 148.59 1.000-32 THD Laser Beam Expanders

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O p t i c s 501 Email: sales@newport.com • Web: newport.com TECHNICAL REFERENCE AND FUNDAMENTAL APPLICATIONS LENS SELECTION GUIDE SPHERICAL LENSES CYLINDRICAL AND SPECIALTY LENSES OPTICS SETS OPTICAL SYSTEMS MIRRORS PRISMS Laser Beam Expander Performance The relationship between magnification M, spot size S, range R, and depth of field Z given below, assumes a TEM00 mode HeNe laser with a 0.8 mm diameter beam at 1/e2 intensity level. The values in the chart are based on the relationship S = KR/M. For S expressed in millimeters and R in meters, K = 1.1 for our T81-3X. T81-10X and T81-20X and...

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Laser Beam Expanders 2Pages

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Laser Beam Expanders
2Pages