Various Beam Expanders

Various Beam Expanders

Keywords: Beam Expander, 405nm, 808nm, 980nm, 1550nm, 355nm, 532nm, 106
Mar 12, 2021 View: 4042 Data Sheet

Our zoom beam expanders (or called as variable beam expander) are highly corrected 4-lens element systems with variable magnification from 1x up to 8x and Galilei-design.

We offer 3 types of beam expanders: fixed beam expanders, zoom beam expanders and motorised beam expanders at various wavelengths of 266nm, 343-355nm, 405nm, 633nm, 515-545nm, 808-980nm, 1030-1090nm, 155nm, 1850-1980nm, 10.6um. Other wavelengths and custom-designed beam expanders are available upon request. For more information, please feel free to contact us.

The specifications of the lenses used in the beam expanders are:

  • Material: BK7 fine annealed, fused silica and ZnSe depending on laser wavelength.

  • Diameter: -0.1mm

  • Thickness: ±0.1mm

  • Flatness: /4

  • Surface Quality: 60-40 scratch-dig

  • Coating: HR dielectric coatings R > 99%

Part number description: BEST-xxx-yy-T-AA
 BEST --- BEST series beam expanders, zoom beam expanders.
 xxxx------- laser wavelength: 10.6 means 10.6um, 532 means 532nm, 633 means 633nm.
 yy -------- expansion ratio (magnification) in times
 T ---------- type: T means adjustable/various/zoom beam expander; none means fixed beam expander.
 AA -------- special purpose.
 Example: BEST-10.6-3: 10.6um fixed beam expander, 3x.
  BEST-10.6-3.5T: 10.6um zoom beam expander, max. 3.5x.

We may use the following abbreviations in the tables: WL=wavelength, MAG=magnification, CA=clear aperture, CA1=input clear aperture, CA2=output clear aperture, D1=input diameter, D2=output diameter, L1=total length of beam expander, M1=connection or mounting thread, D=diameter.

Following is the beam expanders at the wavelengths of 405nm, 633nm, 808-980nm, 1550nm, 1850-1980nm.

(1) 405nm Beam Expanders

BEST Series 405nm Beam Expanders

Part No.MAGCA1(mm)CA2(mm)D2 (mm)L1 (mm)
BEST-405-1.5X-W1.56.030.04685
BEST-405-2X-W26.030.04685
BEST-405-3X-W36.030.04685
BEST-405-5X-W56.030.04685
BEST-405-7X-W74.230.04685
BEST-405-10X-W103.030.04689
BEST-405-20X-W201.530.04695

(2) 633nm HeNe Laser Beam Expanders

Part No.MAGEP, mmCA2, mmL1, mmL2, mmOD, mmMT INMT OUT
BEGK-633-2281859.6511.7230M22X0.75M30X1
BEGK-633-3381860.4212.4830M22X0.75M30X1
BEGK-633-4481860.0612.1230M22X0.75M30X1
BEGK-633-5581859.5711.6330M22X0.75M30X1
BEGK-633-6681859.9211.9930M22X0.75M30X1
BEGK-633-8861860.4312.5030M22X0.75M30X1
BEGK-633-101061860.6512.7130M22X0.75M30X1
BEGK-633-151581899.10--30M22X0.75--
BEG-633-2020830102.19--45M30X1M43X0.75
BEGK-633-3030832149.81--45M22X0.75M43X0.75
BEGK-633-40408100232.6--112M22X0.75--

(3) Beam Expander Mount

The beam expander mounts are used to hold a beam expander, red pilot diode, mirrors with the screw M22x0.75mm. They are 4D adjustable for optics alignment at angles, positions.

beam expander mount

  • Model: SMH-13-048

  • 4D adjustable (4-axil adjustable) (X and Y direction travel ±2mm, X and Z direction tilting ±4 deg)

  • Suitable for the beam expander with a screw of M22x0.75mm

  • Dimension:60x60x45mm

Custom-made beam expander mounts available upon request.

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