A Monolithic CMOS Image Sensor With Wire-Grid Polarizer Filter Mosaic in the Focal Plane

Zhang, Milin; Wu, Xiaotie; Engheta, Nader; Spiegel, Jan Van der

doi:10.1109/ted.2014.2299757

Cited by 9 publications

(3 citation statements)

References 42 publications

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“…Earlier works [41], [42] have shown the effect of varying the polarizer parameters and its impact on the polarization extinction ratio. For our design we have chosen to implement the polarizer grating using the metal 1 layer with a pitch of 200 nm and 50% duty cycle.…”

Section: Polarization and Its Detectionmentioning

confidence: 99%

Polarization-Based Angle Sensitive Pixels for Light Field Image Sensors With High Spatio-Angular Resolution

Varghese

Chen

2016

IEEE Sensors J.

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This paper presents a new angle sensitive pixel design for use in light field image sensors. This new pixel, referred to as the macro-pixel, is comprised of seven sub-pixels, and can determine the light angles in the range from −45°to +45°. The range of detectable angles is only limited by the presence of routing metals in the vicinity of the pixels. Each macro-pixel captures incident light angle through the aid of sub-wavelength metallic structures at its focal plane. Unlike previous designs that needed a large number of sub-pixels to determine a limited range of the incident angles, the presented design requires only half as many sub-pixels while offering a comparatively large angle detection range.Index Terms-Polarization pixels, angle detection, quadrature pixel cluster, light field image sensor, linear angle sensitive pixels, Talbot pixels.

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Section: Polarization and Its Detectionmentioning

confidence: 99%

Polarization-Based Angle Sensitive Pixels for Light Field Image Sensors With High Spatio-Angular Resolution

Varghese

Chen

2016

IEEE Sensors J.

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“…As a result, the period T is simulated from 200nm to 400nm. In order to keep a small duty ratio (i.e., L/T ) and enable a large transmittance [8], the line width is simulated from 90nm to 110nm. As summarized in Table I, the optimized value for T and L are reported to be 300nm and 100nm, respectively.…”

Section: B Design and Simulation Of Optical Model Of The Proposed Dua...mentioning

confidence: 99%

A Dual-Mode Polarization Image Sensor Design Based on In-Pixel Dual-Band Metal Wire Grid for Trustworthy Sensing

et al. 2022

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“…A polarizer grating can be characterized by its width 'W' and pitch 'd'. From theory [33] we know that a wire grid grating such as the one shown in Earlier works [97], [98] have shown the effect of varying the polarizer parameters and its impact on the polarization extinction ratio. For our design we have chosen to implement the polarizer grating using the metal 1 layer with a pitch of 200 nm and 50% duty cycle.…”

Section: Chapter 5 Polarization-incident Angle Sensitive Imagingmentioning

confidence: 99%

Angle sensitive imaging : a new paradigm for light field imaging

Varghese¹

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This work builds heavily on the theoretical premise laid down by the earlier work on multi-aperture imaging. Practical aspects are modeled on the diffraction based Talbot effect. The solution falls into a general category of sub-wavelength apertures and is a one-dimensional case of the same. We explore other alternative solutions such as differential quadrature pixels, polarization pixels, multi-finger pixels and combinations of these to effectively capture the angular information of light by consuming only a very small imager area. We establish the capabilities of our technique through rigorous testing of individual sensing elements and the image sensor as a whole. Our solution enables a rich set of applications among which are fast response auto-focus camera systems and single-shot passive 3D imaging.

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A Monolithic CMOS Image Sensor With Wire-Grid Polarizer Filter Mosaic in the Focal Plane

Cited by 9 publications

References 42 publications

Polarization-Based Angle Sensitive Pixels for Light Field Image Sensors With High Spatio-Angular Resolution

Polarization-Based Angle Sensitive Pixels for Light Field Image Sensors With High Spatio-Angular Resolution

A Dual-Mode Polarization Image Sensor Design Based on In-Pixel Dual-Band Metal Wire Grid for Trustworthy Sensing

Angle sensitive imaging : a new paradigm for light field imaging

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