Demand for high-speed subject recognition technology is obvious in several industrial situations. A number of high-speed image sensors have been developed for many applications such as robotics, factory automation and traffic management. As the speed of an image sensor increases, a higher performance on-chip signal processing circuit is required to handle larger amounts of data. Along with high-speed, high resolution image processing is important for accurate image analysis. However, this makes the system more complicated. An entire high resolution image includes redundant information in many cases. For example, a vehicle identification system does not need the whole vehicle image. It only needs to capture the image around the license plate to identify the number.A region-of-interest readout method giving only essential information reduces the amount of pixel data to be processed thus minimizing the hardware of internal and external circuitry [1]. Several camera systems which are specialized to capture the partial images are on the market [2] [3]. No system, however, can automatically detect the region to be read in real time. A system with this capability is advantageous for increasing the dynamic range when consecutive integration of the partial images is performed. As a result, random noise is suppressed and the target is recognized precisely. "Profile Imager" is developed to capture the required partial images in real time.
We developed a liquid-crystal spatial light modulator having a 30 mm active area and a multilayered dielectric mirror for industrial infrared lasers to establish an innovative manufacturing and fabrication technique in the smart-manufacturing post-pandemic era. The reconstruction of computer-generated holograms was achieved to demonstrate the concept of this device in the IR region. The incident phase performance characteristics of this device under high-power laser irradiation were obtained using a 1030 nm ultrashort pulse laser. The work presented here will accelerate the use of liquid-crystal SLMs in high-precision laser processing of the process-resistant materials and high-throughput processing for additive manufacturing.
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