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| Camera-guided solar cell manufacturing: | | Print | |
| News - Latest Machine Vision News | |||
| Monday, 24 August 2009 10:05 | |||
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Camera-guided solar cell manufacturing: Specialized software library for intelligent cameras Ettlingen – Vision Components enables cost-efficient and powerful production and quality control in the solar industry. Combined with the VC Solar Solution software library, the company’s network-compatible Smart Cameras form an autonomous robot guidance solution for solar cell production. Due to their small size, the compact vision systems can easily be retrofitted into existing installations. They process several images simultaneously and transmit data in real time. Inspection tasks include detecting wafer positions, measuring all geometric dimensions, monitoring surfaces, and detecting damaged edges.  Figure: Near infrared image of a polycrystalline wafer with micro cracks in the center captured by VC4067/NIR Vision Components offers a wide range of performance-graded, fully integrated intelligent cameras for combination with the VC Solar Solution software library. The company has developed its new VC4067/NIR near infrared camera primarily for use with the VC Solar Solution. Thanks to a unique sensor operation mode, the photosensitive technology ensures highly precise images at wavelengths up to 1,100 nm. As a result, the camera is optimally suited, e.g., for electroluminescence (EL) quality control tasks. It reliably detects and identifies defects such as micro cracks, shunts, and disconnected fingers. The resolution equals that of similar systems on the market without integrated intelligence. Unlike those, the cost-efficient VC solutions include all image processing electronics and do not require cooling systems. Featuring an integrated 400 MHz processor from Texas Instruments, the VC4067/NIR has a computing power of 3,200 MIPS. The 2/3" CCD sensor has a 1,280 x 1,024 pixel resolution and provides a maximum frame rate of 14 fps and a freely programmable exposure time from 5 µs to 17 s. The VC4067/NIR comes with RS232 and Ethernet interfaces and an external trigger input that enables jitter-free image capture even at high reading frequencies. Standard configuration also includes four digital PLC inputs and four outputs and an SXGA video output.
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