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CAOS line camera.

Mohsin A Mazhar, Conor Russell, Mohammad Amiri

|December 25, 2019

Summary

This summary is machine-generated.

A new Coded Access Optical Sensor (CAOS) line camera, a 1D version of the 2D CAOS camera, is presented. This system uses a scanning galvo system for enhanced field of view and is ideal for broad-spectrum imaging applications.

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Area of Science:

Optical Engineering
Image Sensing Technology
Instrumentation

Background:

Traditional 2D cameras face limitations in broad-spectrum, large area imaging.
Digital Micromirror Device (DMD) based Coded Access Optical Sensor (CAOS) cameras offer unique imaging capabilities.
Developing line-scan versions of advanced imaging systems can expand their applicability.

Purpose of the Study:

To propose and demonstrate a one-dimensional (line) version of the 2D DMD-based CAOS camera.
To integrate a precise dual-axis mirror scanning galvo system for enhanced field of view (FOV) and eliminate mechanical target/camera movement.
To explore future CAOS line camera designs for improved irradiance coding and reduced inter-pixel crosstalk.

Main Methods:

A 2D DMD was operated as both a full-frame and a line modulator to demonstrate CAOS line scan imaging.
A dual-axis mirror scanning galvo system with feedback control was incorporated into the CAOS line camera design.
Experiments were conducted using a white light source and two test targets, comparing line scan with non-scan 2D CAOS imaging.

Main Results:

Demonstrated CAOS line scan imaging using a 2D DMD, achieving both full-frame (127x45 pixels) and line (127 pixels) scan modes.
Achieved significant increases in the camera unit's field of view (FOV) by factors of 2.87 (horizontal) and 1.67 (vertical) using the galvo system.
Validated the CAOS line camera's performance against non-scan 2D CAOS imaging.

Conclusions:

The developed CAOS line camera effectively extends CAOS imaging to a line-scan format.
The integrated galvo system enhances FOV without requiring camera or target motion, crucial for large-area applications.
The CAOS line camera is well-suited for broad-spectrum, large area/FOV imaging challenges requiring high dynamic range and low contrast recovery, such as industrial inspection and artwork analysis.