Design of Compact Athermalized Long-Wave Infrared Lens Set with Large Field of View
Following the trend of miniaturization and large fields-of-view for infrared lenses,we designed a large-field-of-view athermalized compact long-wave infrared lens using ZEMAX.The system matches a 384×288@17 μm uncooled long-wave infrared detector with an operating band of 8 μm to 12 μm.The F-number of the system is 1.6.The designed system has a larger field-of-view than a traditional infrared lens,with a full field-of-view reaching 72°.The size of the designed system is small with a total length of only 6.96 mm.The primary lens system lens uses only 3 lenses.Aberration correction and athermalization was realized by combining two infrared materials and six aspherical surfaces.The system has a working temperature range of-40℃ to 60℃.Simulation results show that the MTF of the full field-of-view reaches 0.5 at a spatial frequency of 15 lp/mm and 0.15 at a spatial frequency of 30 lp/mm.Further,to increase the filling factor of the infrared detector and improve energy efficiency,a microlens array is placed in front of the infrared sensor.Miniaturization of the infrared optical system was achieved,providing a solution for the application of thermal imaging cameras on smartphones.
long-wave infraredathermalizationlarge field of viewmicrolens array
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维普
