Overview: Laser Beam Expander are optical devices which increases the
diameter of the input beam to produce a larger output, but they not
only increase the diameter of a collimated laser beam, they also
decrease beam divergence. Used with collimated light, they have
important applications in remote sensing, interferometry, and laser
scanning. A beam expander consists of two lenses. First, the beam is diverged
with a short focal length lens and then the diverging beam is
re-collimated with a larger beam waist and smaller divergence. The
lenses are positioned like in an inverted telescope. The light
enters in the eyepiece lens and emerges from the objective lens. These fixed-magnification laser beam expanders are offered with
optics that have either narrowband or broadband AR coatings besides
355nm. General Specifications of 355nm Laser Beam Expander: | Material | N-BK7 or UV Fused Silica | | Mount Material | Black Anodized Aluminum | | Transmitted Wavefront Distortion | λ/4 @632.8nm (RMS) | | Surface Quality | 60/40 scratch-Dig | | Mount Thread | M22x0.75mm | | Coating | Multi Layer AR Coating Total Transmission >98%@Design Wavelength | | Damage Threshold | >5J/cm2, 20ns, 20Hz, @1064nm |
Standard Products Of 355nm Laser Beam Expander: | PN. | Magnification | Wavelength (nm) | Max Input Aperture (mm) | Max Eixt Aperture (mm) | Diameter (mm) | Length (mm) | Mount Thread | | LBE-2X-355 | 2 | 355 | 6 | 21.6 | 27 | 46.5 | M22×0.75 | | LBE-3X-355 | 3 | 355 | 6 | 21.6 | 27 | 52 | M22×0.75 | | LBE-4X-355 | 4 | 355 | 6 | 21.6 | 27 | 70.5 | M22×0.75 | | LBE-5X-355 | 5 | 355 | 6 | 21.6 | 27 | 76 | M22×0.75 | | LBE-6X-355 | 6 | 355 | 6 | 21.6 | 27 | 62 | M22×0.75 | | LBE-7X-355 | 7 | 355 | 6 | 21.6 | 27 | 63 | M22×0.75 | | LBE-8X-355 | 8 | 355 | 6 | 21.6 | 27 | 64.5 | M22×0.75 | | LBE-10X-355 | 10 | 355 | 6 | 21.6 | 27 | 66 | M22×0.75 | | LBE-12X-355 | 12 | 355 | 6 | 21.6 | 27 | 84.5 | M22×0.75 | | LBE-15X-355 | 15 | 355 | 6 | 21.6 | 27 | 70.5 | M22×0.75 | | LBE-20X-355 | 20 | 355 | 6 | 21.6 | 27 | 87.2 | M22×0.75 |
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