Coatings in the focus of an optical system must meet very high defect requirements such as "no defect larger than x micrometer". Defect critical devices are:
Optics Balzers has the experience, the sophisticated processes and the dedicated clean room to offer all the required coatings in low defect quality.
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Optical coatings on lids for high performance digital image sensors require very low densities of small defect sizes. Broadband antireflective coatings with low residual reflections and spectrally neutral performance eliminate ghost effects. |
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Filter coatings with efficient near infrared (NIR) and optional ultraviolet (UV) blockings tightly limit the sensors' response to the visible wavelength range. Details of spectral filter characteristics and wavelength ranges are optimized for customer specific requirements and applications. |
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Sensor internal reflections (ghost effects) can be eliminated by the use of an aperture on the sensor lid. Precision apertures are based on sputtered low reflectance chromium coating with a photolithography patterned clear aperture. |
