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Top Hat Beam Shaping Lens FBSL SKU: FBSL-355-3.0
FBSL series Top Hat beam shapers are single-piece optical elements designed for the generation of square Top Hat profiles. FBSL beam shapers are so-called focal beam shapers and can generate a Top Hat profile in the focal plane of nearly any focusing optics. Each FBSL lens is…
Variant specifications
| Specification | Value |
|---|---|
| Operation Wavelength | 355 nm |
| Input Beam Diameter @ 1/e² | 3.0 mm |
Shared product specifications
These specifications apply across the Top Hat Beam Shaping Lens FBSL product family.
SPOT GEOMETRY
| Line length (Top Hat) | approximately 2 * λ * f / d, with f = focal length, d = beam diameter @1/e2 |
| Line width (Gaussian) | similar to the diameter of the Gaussian spot in the same optical configuration |
| Efficiency | up to 92.5% |
| Homogeneity | ca. ± 2.5% (rel. to average intensity of the Top Hat plateau) |
| Side modes (strongest) | ~15x weaker than line plateau (< 1.7% of input energy) |
| Depth of focus (DOF) | ~50% of the Rayleigh length |
SUBSTRATE SPECIFICATIONS
| Material | Fused silica |
| Transmission | >99% |
| Damage threshold @ 10 ns | 10 J/cm² @ 1064 nm 5 J/cm² @ 532 nm 3 J/cm² @ 355 nm |
| Dimensions | ⌀25.4 x 3 mm |
Product brochures
Shared documentation for the complete product family.