Princeton Infrared Technologies, Inc. (PIRT) is showcasing the revolutionary 1024L1-12.5-T Linear Array, at SPIE Defense + Commercial Sensing, 17 to 21 April in Baltimore.
An indium gallium arsenide (InGaAs) sensor designed for both spectroscopy and machine vision in the shortwave infrared (SWIR) spectrum, this array provides 1024 x 1 resolution with a small 12.5 micron pitch and delivers the lowest read noise currently available at m.
The 1024L1 uses a single digital ROIC chip to minimize variation from output to output, which is often an unwanted feature on linear arrays with multiple ROICs. The chips have built-in 14-bit analog-to-digital converters that maximize dynamic range (>6000:1) and minimize noise, while delivering 34klines/s at 1024 elements. It also has the largest selection of full wells, from 75ke- to 100Me-, in the industry.
The lattice-matched InGaAs array is backside illuminated to enable detection in the visible to the SWIR from 0.4 to 1.7 µm. A distinct advantage to backside illumination is that it minimizes stray reflections that plague competing front-side illuminated arrays; bond pads and the many wire bonds near the active imaging area of front-side illuminated arrays often create odd light apertures that adversely affect image quality. The new backside-illuminated 1024L1 Linear Array can also be customized by depositing optical filters directly onto the active detector area; this is nearly impossible to do with a front-side illuminated device with its wire bonds.