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)
266 nm 157,2 23,6 90,7 19,4
355 nm 169,7 35,9 90,7 19,4
532 nm 169,3 31,5 70,4 43,7
1064 nm 169,3 31,5 70,4 43,7
Broadband VIS (633 nm) 169,3 31,5 70,4 43,7
Broadband NIR (785 nm) 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+
266 nm V-Coat, Rabs <0,25% @ 266 nm <λ/4 for Input Beam ≤5 mm See Website #87-559 €1.149,00 €999,00
Call For OEM Quantity Pricing
355 nm V-Coat, Rabs <0,25% @ 355 nm <λ/4 for Input Beam ≤5 mm See Website #87-560 €1.049,00 €899,00
532 nm V-Coat, Rabs <0,25% @ 532 nm <λ/4 for Input Beam ≤5 mm 5 J/cm2, 10 ns, 20 Hz, 532 nm #87-561 €1.049,00 €899,00
1064 nm V-Coat, Rabs <0,25% @ 1064 nm <λ/7 for Input Beam ≤5 mm 10 J/cm2, 10 ns, 20 Hz, 1064 nm #87-562 €1.049,00 €899,00
Broadband VIS (633 nm) Ravg <1,0% @ 425 -700 nm <λ/4 for Input Beam ≤5 mm 5 J/cm2, 10 ns, 20 Hz, 633 nm #87-563 €1.049,00 €899,00
Broadband NIR (785 nm) Ravg <1,0% @ 750 - 1100 nm <λ/5 for Input Beam ≤5 mm 5 J/cm2, 10 ns, 20 Hz, 785 nm #87-564 €1.049,00 €899,00
TECHSPEC® Research-Grade Variable Laser Beam Expanders – 2X - 8X *266 nm Expansion Power: 2,5X - 8X
DWL Coating Transmitted Wavefront Damage Threshold, By Design Stock No.
Price
1-4 5-24 25+
266 nm* V-Coat, Rabs <0,25% @ 266 nm <3/4λ for Input Beam ≤4 mm (2.5X - 4X)
<λ/2 for Input Beam ≤2 mm (>4X) See Website #87-565 €1.349,00 €1.149,00
Call For OEM Quantity Pricing
355 nm V-Coat, Rabs <0,25% @ 355 nm <λ/4 for Input Beam ≤4 mm (2X - 6X)
<λ/4 for Input Beam ≤2 mm (>6X) See Website #87-566 €1.299,00 €1.099,00
532 nm V-Coat, Rabs <0,25% @ 532 nm <λ/4 for Input Beam 4 mm (2X - 6X)
<λ/4 for Input Beam 2 mm (>6X)
5 J/cm2, 10 ns, 20 Hz, 532 nm (>3X)
3 J/cm2, 10 ns, 20 Hz, 532 nm (2X - 3X) #87-567 €1.249,00 €1.059,00
1064 nm V-Coat, Rabs <0,25% @ 1064 nm <λ/7 for Input Beam 4 mm (2X - 6X)
<λ/7 for Input Beam 2 mm (>6X)
10 J/cm2, 10 ns, 20 Hz, 1064 nm (>3X)
5 J/cm2, 10 ns, 20 Hz, 1064 nm (2X - 3X) #87-568 €1.249,00 €1.059,00
Broadband VIS (633 nm) Ravg <1,0% @ 425 - 700 nm <λ/4 for Input Beam 4 mm (2X - 6X)
<λ/4 for Input Beam 2 mm (>6X)
5 J/cm2, 10 ns, 20 Hz, 633 nm (>3X)
3 J/cm2, 10 ns, 20 Hz, 633 nm (2X - 3X) #87-569 €1.249,00 €1.059,00
Broadband NIR (785 nm) Ravg <1,0% @ 750 - 1150 nm <λ/5 for Input Beam ≤4 mm (2X - 6X)
<λ/5 for Input Beam ≤2 mm (>6X) 5 J/cm2, 10 ns, 20 Hz, 785 nm #87-570 €1.249,00 €1.059,00
Max. Outer
Diameter
58.2mm
Rotating Alpha Ring T-Mount (M42 x 0.75)
Length 16.4mm
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