Author: DAHENG IMAGING Date: 2018-11-28
DAHENG IMAGING's first polarization camera with Sony IMX250MZR monochrome is now sampling. A polarization system can provide more information that cannot be obtained by standard visible spectral cameras. Polarization has two physical information, which are the degree of polarization and the direction of polarization. This information is especially good for inspecting highlight scratches, holes on a flat surface or recognizing in low contrast conditions.
Sony IMX250MZR incorporates a nanowire polarizer filter and can capture four directional polarization images in one shot. The polarizer filters on the camera sensor is a 2x2 pattern, with each pixel having a nanowire polarizer filter with a different angle (90⁰, 45⁰, 135⁰, 0⁰). For polarized light, only the portion of the light vector perpendicular to the angle of the nanowire filter grid passes.
Compared with conventional polarization sensors, the polarizer is attached on top of the on-chip lens layer, however , the polarizer of IMX250MZR sensor is formed beneath the on-chip lens layer. A shorter distance between the polarizer and the photodiode improves the extinction ratio and the incident angle dependence.
Performance Specifications of Polarization Camera
*Resulting image of each single polarizing angle is 1224(H)x1024(V) (original width/2 and original height/2).
Examples(from Sony)
Founded in 1991, DAHENG IMAGING is a leading supplier in China that designs and manufactures professional imaging & vision equipments as well as machine vision solutions. Since its founding, the company has been dedicated to the advancement of imaging & vision technologies and delivered a range of own-developed vision products with many proprietary innovations. As a high-tech company with the real strength, DAHENG IMAGING keeps its commitment to all customers - offering superior technologies, high-quality products and perfect service consistently. Please visit DAHENG IMAGING's website at www.daheng-imaging.com for more information.
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