The Focuslight BTS(FAC160)-P0.2 Beam Transformation System is a fast‑axis collimation and lens‑array assembly for diode laser bars, with detailed optical…
The Beam Transformation System (BTS) is designed for diode laser bars with up to 50 emitters, providing a fast‑axis collimation lens (FAC160), a 90° rotation lens array, and a bottom tab to make the beam parameter product symmetrical for free‑beam lasers or fiber coupling. It supports emitter sizes up to 100 µm and a pitch of 200 µm.
The product sheet lists optical and mechanical specifications such as material, dimensions, clear aperture, surface quality, back focal length, numerical aperture, transmission (>98 %) and divergence. Customization options are noted for different laser parameters.
| Material | FL-IR1.9 / S‑TIH53 (Ohara) |
|---|---|
| Length | 12 mm ± 0.1 |
| Width | 0.8 mm ± 0.1 |
| Clear aperture | 10.5 × 0.25 mm² |
| Surface quality | λ/4 at 633 nm (typical) |
| Back focal length (980 nm) | 0.034 mm |
| Pitch | 0.2 mm |
| Gap | 0.0 mm ± 0.01 |
| Numerical aperture (FA) | 0.5 |
| Transmission | > 98 % |
| Remaining divergence (fast axis) | < 12 mrad |
It is used to make the beam parameter product of diode laser bars symmetrical for free‑beam lasers or fiber coupling.
The system consists of a FAC160 fast axis collimation lens, a lens array for 90° rotation of the emitters, and a bottom tab.
The transmission is greater than 98 %.