Demonstration of 136 dB dynamic range capability for a simultaneous dual optical band CAOS camera

Area of Science:

• Optoelectronics
• Image Sensing Technology
• Multispectral Imaging

Background:

• Traditional imaging struggles with extreme contrast and multispectral bright target scenarios.
• Simultaneous dual-band imaging is crucial for advanced scene analysis.
• Existing methods lack the agility and dynamic range for complex visual environments.

Purpose of the Study:

• To propose and demonstrate a simultaneous dual optical band coded access optical sensor (CAOS) camera.
• To design a camera suited for extreme contrast multispectral bright target scenarios.
• To enhance dynamic range and spectral data extraction capabilities.

Main Methods:

• Utilized a digital micromirror devices (DMDs)-based time-frequency agile pixels CAOS-mode.
• Implemented a two-point detector framework for spatial and spectral isolation.
• Employed finer-tuned wavelength filtering (all-optical or electronic filters) for independent spectral data extraction.
• Integrated a 16-bit ADC and large dataset FFT-DSP for signal processing.

Main Results:

• Successfully demonstrated a proof-of-concept visible-near infrared band CAOS imager.
• Achieved simultaneous and independent detection of pixel-selective image information across two broad spectral bands.
• Demonstrated RF domain simultaneous color content monitoring of a white light LED image pixel.
• Attained an agile pixel extreme dynamic range of 136 dB, a 56 dB improvement over prior CAOS demonstrations.

Conclusions:

• The proposed CAOS camera design effectively addresses extreme contrast and multispectral imaging challenges.
• The demonstrated system offers significant improvements in dynamic range and spectral analysis capabilities.
• This technology paves the way for advanced imaging in demanding visual environments.