Snapshot VIS/SWIR HSI Cameras
MULTIPLE is developing a dual-aperture HSI broadband camera covering the VIS and SWIR. This system combines two camera cores, one CMOS and one InGaAs, on a single frame. Exploiting a dual aperture approach – one aperture for the visible range and the other for the SWIR range – and embedded capabilities for computational imaging, MULTIPLE will build a new camera capable of snapshot computational imaging in a broad spectral range, from 0.4 to 1.7 µm wavelength.
The camera will integrate a SoC embedded system for synchronized acquisition from the two cores and embedded processing. Embedded real-time image reconstruction algorithms will be developed for radiometric calibration and de-mosaic. This involves the reconstruction of the hyperspectral datacube for each broadband, VIS and SWIR independently.
Besides, broadband registration of the VIS and SWIR datacubes will be implemented, providing a unique stream of VIS-SWIR HSI data at maximum frame rate.
Following this approach, optical performance – a key factor of HSI performance – may be easily and flexibly optimized for each aperture. Moreover, this will be possible with off-the-shelf and compact optical components, at a fairly low-cost. This is key to keep the final imager cost effective and compact, unlike bulky and expensive prism-based optics. Therefore, MULTIPLE will bring a compact and cost effective broadband dual aperture camera, capable of snapshot hyperspectral imaging in the VIS/SWIR range.
MULTIPLE will design and develop custom mosaic filters and mask for the detector. Snapshot HSI filters for the VNIR & SWIR range will be developed to match spectral monitoring requirements. Following the integration, sensors will be packaged that could then be integrated into a camera/readout system.
These packaged sensors will be calibrated using a monochromator setup, to produce accurate data on the spectral and spatial performance of each of the spectral bands. The calibrated sensors will then be used for further camera integration, which will then be used for further system integration.
Spectrally resolving detector arrays (SRDA), also called snapshot mosaic cameras, are a prominent architecture with the potential to be compact. Snapshot mosaic sensor technology is a unique compact and low cost solution, capable of real-time spectral imaging data acquisition.