Various Beam Expanders

Various Beam Expanders

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. MAG CA1(mm) CA2(mm) D2 (mm) L1 (mm)
BEST-405-1.5X-W 1.5 6.0 30.0 46 85
BEST-405-2X-W 2 6.0 30.0 46 85
BEST-405-3X-W 3 6.0 30.0 46 85
BEST-405-5X-W 5 6.0 30.0 46 85
BEST-405-7X-W 7 4.2 30.0 46 85
BEST-405-10X-W 10 3.0 30.0 46 89
BEST-405-20X-W 20 1.5 30.0 46 95

STS Series 405nm Beam Expanders

Model WL(nm) MAG CA1(mm) CA2(mm) D2(mm) L1(mm) Thread Motorised
STS-EXM0015/173 405 1.5 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0020/173 405 2 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0030/173 405 3 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0050/173 405 5 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0070/173 405 7 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0100/173 405 10 6 31 65 85.1 M30x1 pergency motorised
STS-EXM0200/173 405 20 5 31 65 85.1 M30x1 pergency motorised
STS-EXP0015/173 405 1.5 8 31 46 85 M30x1 not motorised
STS-EXP0020/173 405 2 8 31 46 85 M30x1 not motorised
STS-EXP0030/173 405 3 8 31 46 85 M30x1 not motorised
STS-EXP0050/173 405 5 8 31 46 85 M30x1 not motorised
STS-EXP0070/173 405 7 8 31 46 85 M30x1 not motorised
STS-EXP0100/173 405 10 6 31 46 85 M30x1 not motorised
STS-EXP0200/173 405 20 5 31 46 85 M30x1 not motorised

(2) 633nm HeNe Laser Beam Expanders

Part No. MAG EP, mm CA2, mm L1, mm L2, mm OD, mm MT IN MT OUT
BEGK-633-2 2 8 18 59.65 11.72 30 M22X0.75 M30X1
BEGK-633-3 3 8 18 60.42 12.48 30 M22X0.75 M30X1
BEGK-633-4 4 8 18 60.06 12.12 30 M22X0.75 M30X1
BEGK-633-5 5 8 18 59.57 11.63 30 M22X0.75 M30X1
BEGK-633-6 6 8 18 59.92 11.99 30 M22X0.75 M30X1
BEGK-633-8 8 6 18 60.43 12.50 30 M22X0.75 M30X1
BEGK-633-10 10 6 18 60.65 12.71 30 M22X0.75 M30X1
BEGK-633-15 15 8 18 99.10 -- 30 M22X0.75 --
BEG-633-20 20 8 30 102.19 -- 45 M30X1 M43X0.75
BEGK-633-30 30 8 32 149.81 -- 45 M22X0.75 M43X0.75
BEGK-633-40 40 8 100 232.6 -- 112 M22X0.75 --

(3) 808–980nm Beam Expanders

The material is fused silica.

Model WL(nm) MAG CA1(mm) CA2(mm) D2(mm) L1(mm) Thread Motorised
STS-EXM0020/094 808 - 980 2 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0030/094 808 - 980 3 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0050/094 808 - 980 5 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0100/094 808 - 980 10 6 31 65 85.1 M30x1 pergency motorised
STS-EXP0020/094 808 - 980 2 8 31 46 85 M30x1 not motorised
STS-EXP0030/094 808 - 980 3 8 31 46 85 M30x1 not motorised
STS-EXP0050/094 808 - 980 5 8 31 46 85 M30x1 not motorised
STS-EXP0100/094 808 - 980 10 6 31 46 85 M30x1 not motorised

(4) 1550nm Beam Expanders

The material is fused silica.

Model WL(nm) MAG CA1(mm) CA2(mm) D2(mm) L1(mm) Thread Motorised
STS-EXM0015/008 1550 1.5 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0020/008 1550 2 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0025/008 1550 2.5 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0030/008 1550 3 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0040/008 1550 4 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0050/008 1550 5 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0060/008 1550 6 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0070/008 1550 7 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0080/008 1550 8 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0090/008 1550 9 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0100/008 1550 10 6 31 65 85.1 M30x1 pergency motorised
STS-EXM0120/008 1550 12 8 31 65 85.1 M30x1 pergency motorised
STS-EXP0015/008 1550 1.5 8 31 46 85 M30x1 not motorised
STS-EXP0020/008 1550 2 8 31 46 85 M30x1 not motorised
STS-EXP0025/008 1550 2.5 8 31 46 85 M30x1 not motorised
STS-EXP0030/008 1550 3 8 31 46 85 M30x1 not motorised
STS-EXP0040/008 1550 4 8 31 46 85 M30x1 not motorised
STS-EXP0050/008 1550 5 8 31 46 85 M30x1 not motorised
STS-EXP0060/008 1550 6 8 31 46 85 M30x1 not motorised
STS-EXP0070/008 1550 7 8 31 46 85 M30x1 not motorised
STS-EXP0080/008 1550 8 8 31 46 85 M30x1 not motorised
STS-EXP0090/008 1550 9 8 31 46 85 M30x1 not motorised
STS-EXP0100/008 1550 10 6 31 46 85 M30x1 not motorised
STS-EXP0120/008 1550 12 8 31 46 85 M30x1 not motorised

(5) 1850-1980nm Beam Expanders

Model MAG CA1(mm) CA2(mm) D2(mm) L1(mm) Thread Motorised
STS-EXM0015/159 1.5 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0020/159 2 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0025/159 2.5 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0030/159 3 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0040/159 4 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0050/159 5 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0060/159 6 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0070/159 7 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0080/159 8 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0090/159 9 8 31 65 85.1 M30x1 pergency motorised
STS-EXM0100/159 10 6 31 65 85.1 M30x1 pergency motorised
STS-EXM0120/159 12 8 31 65 85.1 M30x1 pergency motorised
STS-EXP0015/159 1.5 8 31 46 85 M30x1 not motorised
STS-EXP0020/159 2 8 31 46 85 M30x1 not motorised
STS-EXP0025/159 2.5 8 31 46 85 M30x1 not motorised
STS-EXP0030/159 3 8 31 46 85 M30x1 not motorised
STS-EXP0040/159 4 8 31 46 85 M30x1 not motorised
STS-EXP0050/159 5 8 31 46 85 M30x1 not motorised
STS-EXP0060/159 6 8 31 46 85 M30x1 not motorised
STS-EXP0070/159 7 8 31 46 85 M30x1 not motorised
STS-EXP0080/159 8 8 31 46 85 M30x1 not motorised
STS-EXP0090/159 9 8 31 46 85 M30x1 not motorised
STS-EXP0100/159 10 6 31 46 85 M30x1 not motorised
STS-EXP0120/159 12 8 31 46 85 M30x1 not motorised

(6) 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: BEM-22x0.75
  • 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.