New f-theta Scanning Lens for Metal Additive Manufacturing S4LFT5650-292
Sill Optics introduces the new S4LFT5450-292 scanning lens, a 650mm scanning lens designed specifically for additive manufacturing at green wavelengths. Additive manufacturing has developed far beyond prototyping. It processes polymers and metals and is increasingly favored by the jewelry and luxury-goods industries. Its intricate designs and unlimited creative freedom are ideal for unique, high-end pieces. To meet this market's needs, Sill Optics built on the success of S4LFT1655-328 to develop S4LFT5650-292, a lens with a focal length of 650mm. Unlike its predecessor optimized for infrared wavelengths, S4LFT5650-292 is designed for 532 nm green lasers. This wavelength is ideal for metals such as gold and silver, enabling greater energy absorption, higher efficiency, and finer focus sizes of 32 µm to 38.5 µm across a 410 mm x 410 mm field of view with a 20 mm input beam. Made of high-transmission fused silica and featuring a coating with over 98% transmission, S4LFT5650-292 is compatible with modern USP lasers and provides a powerful tool for next-generation luxury-goods manufacturing. As with all our lenses, specifications such as focal length, wavelength, and working distance can be modified to customer requirements, enabling similar customized lenses. Please contact our team for further information. Model | Wavelength | Focal Length | Aperture | Transmittance | Working Distance | Beam Diameter | Weight S4LFT5650-292 | 532nm | 650.0mm | 36.3mm | >91% | 569.9mm | 20mm | 2.27kg
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Overview
Specifications
| Parameter | Value |
|---|---|
| design wavelength [vignetting <1%] | 532 nm |
| effective focal length [vignetting <1%；tolerance ±1.5%] | 650.0 mm |
| working distance [vignetting <1%；tolerance ±1.5%] | 569.9 mm |
| max. entrance beam-Ø [vignetting <1%] | 20.0 mm |
| aperture stop distance [vignetting <1%] | 36.3 mm |
| scan area for a 2 mirror system [vignetting <1%；mirror distance from lens housing：mirror 2 / mirror 1=23.8 / 48.8] | 410 mm×mm × 410 mm×mm |
| max. telecentricity error [vignetting <1%] | 22.70 ° |
| total transmission [vignetting <1%] | >98 % |
| lens material [vignetting <1%] | fused silica |
| LIDT (coating) [vignetting <1%；per 1ns pulse at 50Hz] | 2.5 J/cm² |
| SP and USP usable [vignetting <1%] | yes |
| weight [vignetting <1%] | 2.21 kg |
| cover glass [vignetting <1%] | S4LPG2175-292 |
Datasheet
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