| Features | Applications |
|---|---|
| Low power loss Good output collimation Able to withstand laser power of more than 1000 W Adjustable divergence angle of 18 to 32 mrad with the variable beam expanders | Precision laser machining: capable to provide a high power density focal spot. Laser range finder: capable to provide a highly collimated beam. Combining with a spatial filter, able to modify laser power distribution. |
| Specifications Part No. | Expansion ratio | Dimensions (mm) | |
|---|---|---|---|
| For model III & F | For model FN | ||
| BE-2x | 2X | Ø25*50.5 | |
| BE-3x | 3X | Ø42*84.8 | Ø42*87.8 |
| BE-4x | 4x | ||
| BE-5x | 5X | ||
| BE-8x | 8x | Ø56*147.8 | Ø56*150.8 |
| BE-10x | 10X | ||
| BE-15x | 15x | Ø56*192.8 | Ø56*195.8 |
| BES-01 | BES-02 |
|---|---|
| Dimensions: 75 (L) Ø50 (W) Ø101 (H) mm 3 | Dimensions: 75 (L) Ø50 (W) Ø119 (H) mm 3 |
| Part No. | Expansion ratio | Dimensions (mm) |
|---|---|---|
| BEW-2x | 2X | Ø29*51 |
| BEW-3x | 3X | Ø42*87.8 |
| BEW-5x | 5X | Ø45*123.8 |
| BEW-10x | 10X | Ø84*209 |
| Working wavelength | 355nm/532nm/1064 nm | Rate of adjustment | 2X-10X |
|---|---|---|---|
| element material | Uv fused quartz | Transmittance | Ø96% |
| Surface finish | 40/20 | Incident light aperture | 9.3 mm |
| Weight | Ø0.25 kg | Outgoing light aperture | 33.0 mm |
| Locking method | M3 rubber head screw | Diffraction limit: The maximum diameter of the incident beam | 2.2-6.0 mm @355nm Ø 3.0-8.0 mm @532nm Ø 3.0-8.0 mm @1064nm |
| Length of mechanical parts (2X) | 155.1 mm @355nm Ø 156.2 mm @532nm Ø 158.6 mm @1064nm | Mechanical part length (10X) | 150.5 mm @355nm Ø 150.1 mm @532nm Ø 153.5 mm @1064nm |
| Membrane layer damage threshold | 2.5 J/cm²;1.0MW/cm² @355nm Ø 5.0 J/cm²;2.5MW/cm² @532nm Ø 10 J/cm²;5MW/cm² @1064nm | System damage threshold | 0.25 J/cm²;0.1MW/cm² @355nm Ø 0.5 J/cm²;0.25MW/cm² @532nm Ø 1.0 J/cm²;0.5MW/cm² @1064nm |
Technical FAQ
Configuration questions for Beam Expander
What wavelengths does the Beam Expander cover?
Working wavelength: 355nm/532nm/1064 nm / Rate of adjustment / 2X-10X. Check the specification at your angle of incidence. Coating bands and grating efficiency curves are quoted at a reference angle, and both shift as that angle changes.
What size is the Beam Expander?
Dimensions: 75 (L) Ø50 (W) Ø101 (H) mm 3: Dimensions: 75 (L) Ø50 (W) Ø119 (H) mm 3. Clear aperture is smaller than the physical part, and the mount that holds it takes more again. Size the optic from the beam diameter at that plane, including the margin the mount consumes.
How much optical power can the Beam Expander take?
Membrane layer damage threshold: 2.5 J/cm²;1.0MW/cm² @355nm Ø 5.0 J/cm²;2.5MW/cm² @532nm Ø 10 J/cm²;5MW/cm² @1064nm / System damage threshold / 0.25 J/cm²;0.1MW/cm² @355nm Ø 0.5 J/cm²;0.25MW/cm² @532nm Ø 1.0 J/cm²;0.5MW/cm² @1064nm. Damage thresholds are quoted for a pulse duration, wavelength and beam diameter. Scale them to your own conditions rather than reading the headline figure as a rating.
What is the Beam Expander made from?
element material: Uv fused quartz / Transmittance / Ø96% · Surface finish: 40/20 / Incident light aperture / 9.3 mm. Substrate and coating decide thermal behaviour and cleaning method as much as optical performance. Confirm both before the optic enters a high-average-power or vacuum path.