Optical Filters in Special Sizes

New imaging technologies (cameras, sensors) require very flexible shapes and diameters of optical filters. Requirements can vary from very large sizes (e.g. 280 x 280 mm) to very small sizes (e.g. 2 x 4 mm or 3 mm diameter). AHF can provide such special-sized filters to its customers.

This is made possible by well-established hard coating processes which allow to cut filter into different shapes. These hard coatings show very high durability, very low temperature shifting, very low scattering and absorption and imperviousness to humidity. This opens a wide field of applications. For large diameters, extremely stable deposition rates are essential. They must be precisely controlled.

For very small-sized filters, the cutting procedure will be crucial. The edge chip or clear aperture specification will be very essential and requires a detailed knowledge. AHF cooperates with different renowned suppliers of high-end optical filters and offers independent expert consulting to find optimum solutions for individual imaging set-ups. For prototypes, AHF can offer small quantities for testing. Due to the wide portfolio of existing filter designs, variations of filters can be easily provided to modify the optical parameters.