Top Hat Beam Shaping Lens FBSL
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… Read more →
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Product
Surface 1, Wavelength 1
| SKU | Product Type | Input Beam Diameter | Material | Transmission, % | Wavelength | Reflectivity, % | |
|---|---|---|---|---|---|---|---|
| FBSL-1030-6.0 | FBSL | 6 mm | UVFS | > 99 % | 1030 nm | < 0.2 % |
Out of stock
Ships in: 58–61 calendar days
$1,788
|
| FBSL-355-1.0 | FBSL | 1 mm | UVFS | > 99 % | 355 nm | < 0.2 % |
Out of stock
Ships in: 58–61 calendar days
$1,788
|
| FBSL-355-6.0 | FBSL | 6 mm | UVFS | > 99 % | 355 nm | < 0.2 % |
Out of stock
Ships in: 58–61 calendar days
$1,788
|
| FBSL-515-6.0 | FBSL | 6 mm | UVFS | > 99 % | 515 nm | < 0.2 % |
Out of stock
Ships in: 58–61 calendar days
$1,788
|
| FBSL-532-1.0 | FBSL | 1 mm | UVFS | > 99 % | 532 nm | < 0.2 % |
Out of stock
Ships in: 58–61 calendar days
$1,788
|
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Specifications
| Product Type | FBSL |
| Diameter | 25.4 mm |
| Thickness | 3 mm |
| Material | UVFS |
| Transmission, % | >99 % |
Surface 1, Wavelength 1
| Reflectivity, % | <0.2 % |
| AOI (angle of incidence) | 0 deg |
| Coating | AR |
Surface 2, Wavelength 1
| Reflectivity, % | <0.2 % |
| AOI (angle of incidence) | 0 deg |
| Coating | AR |
Description
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 designed for a fixed input beam diameter (@1/e²) and specific operation wavelength. FBSL beam shaper can be combined with any objective or F-Theta lens, it can be integrated into the beam path at nearly any position, even in front of or within a beam expander / telescope.
FBSL generate Top Hat spots with long depth of focus (DOF), which is about 50% of the Rayleigh length compared to a Gaussian spot in a similar optical setup. Within this range the Top Hat profile doesn’t change and shows nearly constant peak intensity.
The size of the Top Hat size depends on the focal length of the focusing optics (f), the beam diameter @1/e² (d), and the operation wavelength (λ).
The approximate size of the Top Hat can be calculated by the formula:
2 * λ * f / d or λ / NA, where NA is the numerical aperture of the focused beam.