The electric charges that represent the light intensities accumulated from each pixel are quantized by the multi-channel A/D converters and are stored in the memory of the camera. Consequently, the parallel read out circuit is arranged in a corresponding matrix.
One polarization datum can be obtained by calculating detected light intensities from the four pixels of the image sensor. In the polarizer array, groups of four neighboring polarizers (2 x 2) are set to have differing fast axis orientation at 0°, 45°, 90° and 135° in a clockwise arrangement. The size of each polarizer and pixel is 20 µm x 20 µm. Each polarizer corresponds to each pixel of the image sensor with a one to one ratio. The image sensors design and fabrication incorporates a pixelated polarizer array which is made from photonic crystal bonded directly to the CMOS sensor, making the optical system in this sensor resistant to vibration. In order to overcome this problem, The Crysta utilizes a high-speed 2D birefringence measurement system with a sampling rate of 1.3 MHz as the core device of the system with 16 parallel read out circuits in a matrix in the image sensor, which are connected to each pixel with individual A/D converters. The Photron Crysta is a high-speed polarization camera for the two-dimensional analysis of birefringence measurements, film thickness analysis, and surface roughness inspection, and is a powerful tool to understand phenomena such as birefringence, retardation, stress and impact fracture mechanisms of materials and fluids.Ĭurrently established systems employ mechanical or electrical drives as polarization modulators, they require several photo-detection processes to measure polarization. Standard operational features of the FASTCAM Mini UX include a Gigabit Ethernet Interface for reliable system control with high-speed data transfer to PC, and the ability to remotely switch off cooling fans to eliminate vibrations when recording at high magnifications. This small and rugged camera design makes the FASTCAM Mini UX ideally suited to on-board and off-board automotive safety testing and many other applications where a compact size and compatibility with standard optical systems is required. The FASTCAM Mini UX features a rugged design suitable for operation in high shock and vibration environments and a compact camera body (120mm x 120mm x 93mm) weighing just 1.5kg. At maximum image resolution the image sensor is fully compatible with readily available 1-inch C-mount lenses offering a wide choice of small, lightweight, rugged and high aperture objective lenses. Using innovative proprietary CMOS image sensor technology, the FASTCAM Mini UX achieves high light sensitivity from a small image sensor (10μm pixel pitch) through the utilization of microlenses to increase effective Fill Factor. Both models are available with recording memory options up to 32GB providing extended recording times and triggering flexibility. Two Mini UX camera models provide 1.3-megapixel (1280 x 1024 pixels) image resolution with frame rates up to 2,000fps from the Mini UX50 and 4,000fps from the Mini UX100.
For use with a wide range of general scientific and industrial applications the Photron FASTCAM Mini UX high-speed camera provides outstanding imaging performance at a very attractive price performance ratio.
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