Novel High-Efficiency and Cost-Effective Filters and Windows for Infrared Detectors

摘要

Optical filters and windows are fundamental components of all modern infrared detectors. Their primary function consists in the transmission of the adequate portion of the electromagnetic spectrum which is to be measured by the sensor and in the rejection of undesired radiation. Therefore, the optical performance of the chosen filter has direct impact on the responsivity and on the signal-to-noise ratio of the detector. Recent developments of infrared filters optimized by JENOPTIK Laser, Optik, Systeme GmbH in accordance with several application requirements are presented. On the other hand the optical filter also represents an integral part of the opto-mechanical system of the detector set-up. Thus, for reasons of cost efficiency and higher integration it is desirable to provide the filters with additional system functionality. At JENOPTIK Laser, Optik, Systeme GmbH processes have been developed for the production of infrared filters with such enhanced functionality. On customer demand the filters may be equipped with solderable edges, structured apertures, stray light suppressing elements or other features, all of very high precision. Depending on the application both highest-efficiency and very cost-effective infrared filters and windows may be realized on industrial scale. Solution examples and design options are presented.