Schott Advanced Optics has released an improved version of its LASF35 glass (nd = 2.02204; vd = 29.06). In doing so, Schott is optimising its line of glasses that feature high refractive indexes in extreme regions of the Abbe diagram.
LASF35 glass is particularly well-suited for miniaturised lens systems, such as those used as ball lenses or micro prisms in medical technology for endoscopes, microscopes and other micro lenses, for example.
When it comes to manufacturing, Schott uses a continuous melting process and, therefore, achieves much higher internal transmission (63 per cent at 400nm for a thickness of 10mm; colour code: 45/37) that outshines all other comparable glasses, particularly inside the blue wavelength region.
The new glass has been approved in accordance with the European Guideline 2002/95/EG (RoHS, Restriction of the use of certain hazardous substances in electrical and electronic equipment). Schott is also planning to introduce a version called N-LASF35 that will be free of arsenic in the future.