کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1678751 | 1009959 | 2008 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Uncooled infrared imaging device based on optimized optomechanical micro-cantilever array Uncooled infrared imaging device based on optimized optomechanical micro-cantilever array](/preview/png/1678751.png)
It is a major issue to improve the thermo-mechanical sensitivity of uncooled optomechanical focal plane arrays (FPAs) for infrared imaging. This work presents an optimized multi-fold interval metallized leg (IML) configuration to increase the thermo-mechanical sensitivity of an uncooled optomechanical bi-material micro-cantilever array. The inclination angle changes of the cantilever elements are measured in the IR imaging system using an optical readout with a knife-edge filtering operation in the spectrum plane. The multi-fold IML configuration consists of alternately connected unmetallized and metallized legs. With the optimized fold number, the thermo-mechanical sensitivity of a micro-cantilever array can be amplified to two times of one-fold IML for a 120 μm×120 μm element with 1 μm thick SiNx/0.2 μm thick Au films. Room temperature objects are imaged with the fabricated FPA containing 160×160 elements and a 12-bit CCD. Further modeling analysis shows that the experimental results are well accordant with the theoretical calculation. An important practical feature of the implemented approach is its straightforward fabrication for a large FPA, without growing complexity and cost.
Journal: Ultramicroscopy - Volume 108, Issue 6, May 2008, Pages 579–588