InGaAs SWIR Line-Scan Camera

Sensors Unlimited Inc.

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PRINCETON, N.J., March 2, 2011 — For machine vision, sorting and solar inspection applications, Sensors Unlimited – Goodrich ISR Systems’ new compact SU1024LDM line-scan camera features high-resolution 1024-pixel imaging in the short-wavelength infrared (SWIR).

Its square pixels are suitable for inspection of polished silicon blocks, ingots or wafers, and hot glass bottles, and for use on continuous-process lines that apply transparent coatings that can be seen in the SWIR spectral region. The square pixel design ensures that the pixel height is sharply defined by a metal mask, providing better uniformity of response and improved measurement accuracy for the object being imaged.

The robust camera measures 76 × 74 × 61 mm and has mounting points on four of its six sides, facilitating integration into a processing line or machine vision system. It features a 14-bit base Camera Link interface, flexible triggering and line rates up to 46,000/s for its 1024-pixel width. It offers high quantum efficiency, a wide dynamic range and integrate-while-read acquisition. The housing supports an operating temperature range of -10 to 50 °C. An optional 50-mm f/1.4 lens designed specifically for the SWIR also is available.

In solar applications, the new InGaAs line-scan imager detects cracks, occlusions, inclusions and misalignments before further processing, eliminating the waste and expense of manufacturing defective solar wafers or cells. Other applications include high-speed imaging of free-falling molten glass; fast absorption or emission spectroscopy for combustion research, moisture, lipids, proteins and other molecular vibration bands in the SWIR; and online sorting of agricultural materials, food products, recycled plastic pellets and pharmaceutical products.

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Published: March 2011