Glasses of the tolerance level 0.5 are particularly well-suited for use in high precision lenses. To achieve the best possible resolution, several lenses must be precisely in tune with each other. The narrow optical position of the glasses helps to improve the quality of the lenses used in inspection systems in industry or microscopy.
In response to the growing demand, SCHOTT now offers the following preferred fine annealed and prepared glass types in the tolerance level 0.5 from stock: N-BK7 and N-BK7HT, N-KZFS4 and N-KZFS4HT, N-KZFS5, N-KZFS8, N-PK51 and N-FK51A. Other glasses of the tolerance level 0.5 are available upon request.
The range of preferred glasses now available supports a wide range of applications. For instance, highly homogeneous N-BK7HT is a typical prism glass. Or N-KZFS, with its abnormal partial dispersion, is used together with the fluorphosphate glass N-FK51A that is known for its low dispersion to perform precise apochromatic color corrections.
SCHOTT is able to achieve these extremely narrow tolerances by closely controlling the melting and annealing processes with the help of state-of-the art techniques used in glass manufacturing. Then, these glass products are measured extremely precisely and further referenced inside a V-block refractometer at SCHOTT.
Additional information: www.schott.com/advanced_optics
