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In the first part of the paper, a CAOS line camera is introduced for spectralimaging of one dimensional (1-D) or line targets. The proposed spectral camerauses both a diffraction grating as well as a cylindrical lens optics system toprovide line imaging along the line pixels direction of the image axis andFourier transforming operations in the orthogonal direction to provide linepixels optical spectrum analysis. The imager incorporates the DigitalMicro-mirror Device (DMD)-based Coded Access Optical Sensor (CAOS) structure.The design includes a line-by-line scan option to enable two dimensional (2-D)spectral imaging. For the first time, demonstrated is line style spectralimaging using a 2850 K color temperature white light target illumination sourcealong with visible band color bandpass filters and a moving mechanical pinholeto simulate a line target with individual pixels along 1-D that have uniquespectral content. A ~412 nm to ~732 nm input target spectrum is measured usinga 38 by 52 CAOS pixels spatial sampling grid providing a test image line of 38pixels with each pixel providing a designed spectral resolution of ~6.2 nm. Thespectral image is generated using the robust Code Division Multiple Access(CDMA) mode of the camera. The second part of the paper demonstrates for thefirst time the High Dynamic Range (HDR) operation of the Frequency DivisionMultiple Access (FDMA)-Time Division Multiple Access (TDMA) mode of the CAOScamera. The FDMA-TDMA mode also feature HDR recovery like the FrequencyModulation (FM)-TDMA mode, although at a much faster imaging rate and a higherSignal-to-Noise Ratio (SNR) as more than one CAOS pixel is extracted at a time.

CAOS Spectral Imager Design and Advanced High Dynamic Range FDMA-TDMA CAOS Mode