Lasers with pulses shorter than 1 picosecond, the laser creates a noticeable spectral bandwidth which will degrade the spot performance via chromatic errors. For example, an 800 femtosecond Gaussian shaped pulse has a spectral width of about 2 nm and a 250 femtosecond pulse has a width of almost 7 nm (1064 nm, FWHM). This will aberrate the spot in an F-theta lens which is designed to focus only one wavelength. We use multiple glass types in its design so all the wavelengths within a pulse are in focus at the work surface. The lenses have focal lengths of 100 mm, are telecentric, have scan areas of 35 mm x 35 mm and will accept a maximum 10 mm 1/e² input beam.
The STSS4LFT7010/008 covers from 1500 – 1600 nm, the STSS4LFT7010/450 from 1000 – 100 nm and the STSS4LFT7012/292 from 510 – 590 nm. All three lenses are designed to have no internal ghosts or back reflections which can damage lens elements within the lens.
Our product range also includes an ultra-short pulse compatible beam expander with fixed magnification factor of three and designed for 1000 – 1100 nm range. The STSS6ASS4803/450 has a 10 mm (1/e²) maximum input beam diameter and M30x1 mounting.2018! We wish everyone a prosperous year ahead. We look forward to serving our customers and meeting your laser needs!
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