Research-Grade Variable Laser Beam Expanders
• 1X - 3X and 2X - 8X Continuous Magnification
• Non-Rotating Lenses Minimize Beam Wander
• Compact Galilean Designs with Fixed Housing Length
TECHSPEC® Research-Grade Variable Beam Expanders (RVBX) are ideal for high power laser applications
where magnification changes may be required, such as prototyping or R&D. TECHSPEC® Research-Grade Variable
Beam Expanders (RVBX) feature λ/4 transmitted wavefront, Galilean designs, lockable magnification, and
high laser damage threshold AR coatings to ensure maximum transmittance while minimizing ghost reflections.
Additionally, these beam expanders use internal translation and focusing mechanisms to continuously adjust
magnification and laser divergence without affecting overall housing length. The RVBX design removes the
need to make system accommodations for changes in length and eases system integration.
2X - 8X Specifications
DWL Fixed Overall
Length A (mm)
Mounting
Length E (mm)
Rotating Numeric Ring
Length F (mm)
Rotating Alpha Ring
Length G (mm)
266nm 157.2 23.6 90.7 19.4
355nm 169.7 35.9 90.7 19.4
532nm 169.3 31.5 70.4 43.7
1064nm 169.3 31.5 70.4 43.7
Broadband VIS (633nm) 169.3 31.5 70.4 43.7
Broadband NIR (785nm) 169.3 31.5 70.4 43.7
1X - 3X
Fixed Overall Length 172.1mm
Mounting Diameter 55.2mm
Barrel Length
70.1mm
2X - 8X
8 7 6 5 4
Fixed Overall Length (A)
A B C D E
L A B C D E
Alpha Ring
Locking Screw (x1)
1.5mm Hex Key
53.2mm
Diameter
C-Mount (1” x 32TPI)
Alpha Ring
Locking Screw (x1)
1.5mm Hex Key
48mm
11.5mm
C-Mount (1” x 32TPI) Rotating Alpha
Ring Length
Rotating Numeric
Ring Length
Rotating Numeric
Ring Length
Numeric Ring
Locking Screw (x2)
1.5mm Hex Key
Barrel
Diameter
55.2mm
Numeric Ring
Locking Screw (x2)
1.5mm Hex Key
46mm 51mm
Mounting
Length T-Mount (M42 x 0.75)
2 3 4 5 6
65mm
(F) (E)
(G)
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Expansion Power: 1X - 3X, 2X - 8X
Max Input Aperture (mm):
1X - 3X: 10
2X - 8X: 15
Max Output Aperture (mm): 30
Max Input Beam Tilt (mrad): 1
TECHSPEC® Research-Grade Variable Laser Beam Expanders – 1X - 3X
DWL Coating Transmitted Wavefront Damage Threshold, By Design Stock No.
Price
1-4 5-24 25+
266nm V-Coat, Rabs <0.25% @ 266nm <λ/4 for Input Beam ≤5mm See Website #87-559 £976.65 £849.15
Call For OEM Quantity Pricing
355nm V-Coat, Rabs <0.25% @ 355nm <λ/4 for Input Beam ≤5mm See Website #87-560 £891.65 £764.15
532nm V-Coat, Rabs <0.25% @ 532nm <λ/4 for Input Beam ≤5mm 5 J/cm2, 10ns, 20Hz, 532nm #87-561 £891.65 £764.15
1064nm V-Coat, Rabs <0.25% @ 1064nm <λ/7 for Input Beam ≤5mm 10 J/cm2, 10ns, 20Hz, 1064nm #87-562 £891.65 £764.15
Broadband VIS (633nm) Ravg <1.0% @ 425 -700nm <λ/4 for Input Beam ≤5mm 5 J/cm2, 10ns, 20Hz, 633nm #87-563 £891.65 £764.15
Broadband NIR (785nm) Ravg <1.0% @ 750 - 1100nm <λ/5 for Input Beam ≤5mm 5 J/cm2, 10ns, 20Hz, 785nm #87-564 £891.65 £764.15
TECHSPEC® Research-Grade Variable Laser Beam Expanders – 2X - 8X *266nm Expansion Power: 2.5X - 8X
DWL Coating Transmitted Wavefront Damage Threshold, By Design Stock No.
Price
1-4 5-24 25+
266nm* V-Coat, Rabs <0.25% @ 266nm <3/4λ for Input Beam ≤4mm (2.5X - 4X)
<λ/2 for Input Beam ≤2mm (>4X) See Website #87-565 £1,146.65 £976.65
Call For OEM Quantity Pricing
355nm V-Coat, Rabs <0.25% @ 355nm <λ/4 for Input Beam ≤4mm (2X - 6X)
<λ/4 for Input Beam ≤2mm (>6X) See Website #87-566 £1,104.15 £934.15
532nm V-Coat, Rabs <0.25% @ 532nm <λ/4 for Input Beam 4mm (2X - 6X)
<λ/4 for Input Beam 2mm (>6X)
5 J/cm2, 10ns, 20Hz, 532nm (>3X)
3 J/cm2, 10ns, 20Hz, 532nm (2X - 3X) #87-567 £1,061.65 £900.15
1064nm V-Coat, Rabs <0.25% @ 1064nm <λ/7 for Input Beam 4mm (2X - 6X)
<λ/7 for Input Beam 2mm (>6X)
10 J/cm2, 10ns, 20Hz, 1064nm (>3X)
5 J/cm2, 10ns, 20Hz, 1064nm (2X - 3X) #87-568 £1,061.65 £900.15
Broadband VIS (633nm) Ravg <1.0% @ 425 - 700nm <λ/4 for Input Beam 4mm (2X - 6X)
<λ/4 for Input Beam 2mm (>6X)
5 J/cm2, 10ns, 20Hz, 633nm (>3X)
3 J/cm2, 10ns, 20Hz, 633nm (2X - 3X) #87-569 £1,061.65 £900.15
Broadband NIR (785nm) Ravg <1.0% @ 750 - 1150nm <λ/5 for Input Beam ≤4mm (2X - 6X)
<λ/5 for Input Beam ≤2mm (>6X) 5 J/cm2, 10ns, 20Hz, 785nm #87-570 £1,061.65 £900.15
Max. Outer
Diameter
58.2mm
Rotating Alpha Ring T-Mount (M42 x 0.75)
Length 16.4mm
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