CRYSTA HIGH-SPEED REAL-TIME POLARIZATION CAMERA

CRYSTA HIGH-SPEED REAL-TIME POLARIZATION CAMERA

MPA type

Linear polarizer or Phase shifter + linear polarizer

MPLA configuration

2x2 - 0, 45, 90, 135º

Maximum resolution in polarization imaging

1024 x 1024 or 680 x 484

Max fps at full resolution

7000 Hz or 250 Hz

Min exposure time

369 ns or 2.9 µs

Polarization operating wavelength range (nm)

520 ~ 570

Conventional high-speed cameras have been utilized for nearly eighty years and are widely accepted worldwide through continuous technological development to visualize fast occurring phenomena. In recent years, demand for using polarization in structural dynamics and high-speed object detection has been increased due to the advancement of robotics, clear film production and new materials testing technologies. On the other hand, traditional high-speed cameras lack any polarization sensitivity.

CRYSTA has been developed to be the first high-speed camera with polarization sensitivity, developed through over five years of research and development by the market leader in high-speed camera innovation; Photron.

The high-speed polarization image sensor was developed through combining a photonic-crystal micro polarizer array and conventional high-speed image sensor. Photron is committed to continually expand the area of high-speed imaging with this new concept of polarization.

Description

Currently established systems employ mechanical or electrical drives as polarization modulators, they require several photo-detection processes to measure polarization. In order to overcome this problem, the Crysta high-speed real-time polarization camera 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 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. Each polarizer corresponds to each pixel of the image sensor with one to one ratio. The size of each polarizer and pixel is 20um x 20um. In the polarizer array, groups of four neighboring polarizers (2 x2) are set to have differing fast axis orientation at 0, 45, 90, and 135 degrees, in a clockwise arrangement. One polarization datum can be obtained by calculating detected light intensities from the for pixels of the image sensor. Consequently, the parrallel read out circuit is arranged in a corresponding matrix.

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. After that, we apply a phase shift analysis process to the stored data to obtain time-serial images of birefringent phase difference.

Conventional high-speed cameras have been utilized for nearly eighty years and are widely accepted worldwide through continuous technological development to visualize fast occurring phenomena. In recent years, demand for using polarization in structural dynamics and high-speed object detection has been increased due to the advancement of robotics, clear film production and new materials testing technologies. On the other hand, traditional high-speed cameras lack any polarization sensitivity.

CRYSTA has been developed to be the first high-speed camera with polarization sensitivity, developed through over five years of research and development by the market leader in high-speed camera innovation; Photron.

The high-speed polarization image sensor was developed through combining a photonic-crystal micro polarizer array and conventional high-speed image sensor. Photron is committed to continually expand the area of high-speed imaging with this new concept of polarization.

  • All-in-focus imaging with no moving parts — Up to 2.3 mm of perfect focus (Z)
  • Microscopic lateral resolution — Down to 0.4 μm resolution (X,Y)
  • Integrated coaxial illumination — White light line illumination with up to 4 mm FOV
  • High data acquisition rate over CameraLink — > 80,000 lines/sec
  • Works on highly reflective materials — Metal, glass, semiconductor, plastics etc

Manufacturer’s website: https://photron.com/

For more scientific and industrial cameras, visit: https://axiomoptics.com/scientific-industrial-cameras/