Microbolometer focal plane array with integrated multi-spectral mosaic bandpass filter / focus lens array for simultaneous real-time anesthesia and respiratory gas concentration detection and measurement signal processing

摘要

A gas monitoring device (10) identifies the anesthetic or respiratory gas species of interest and determines its concentration. The gas monitor has a multi-spectral mosaic filter and lens array (12), a composite sensing focal plane array (26), and a signal processor (32). The mosaic filter and the lens array (12) are patterned heat reflections disposed between adjacent lens structures and / or filter elements of the first and / or second surface (20,24), respectively. A 2D array of a lens structure (14) and a long wave infrared (IR) bandpass filter element (16) having a metallic alignment layer (18, 22). The composite sensing focal plane array (26) has a plurality of individual thermal sensing focal plane arrays (28) with integrated readout integration circuits (ROIC) that output respective sensing channel data (36). A signal processor (32) receives the sense channel data output (36) and based on the oversampling of the absorption signal on a frame-by-frame basis and / or an image stacking basis, said identification (50) and / or of the gas of interest. Generate an output that represents the concentration (52).