The VIS-NIR hyperspectral imaging system operating over the spectral range 400 – 1000 nm with a spectral resolution of 2.8 nm utilises a push-broom design consisting of a spectrograph and sCMOS camera. It collects spectra for one spatial line at a time, building spectral image cubes through the horizontal of a region. The optics associated with the system are modular, enabling the instrument to be tailored towards different imaging scales. For Microscopic Hyperspectral Imaging, a microscope objective enables the collection of a millimetre scale region, with a spatial resolution of 3 µm at a close range working distance of 30 mm. In the short distance configuration, a telecentric lens provides a spatial resolution of 60 µm at a working distance of 20 cm. In its remote configuration, a telescope is substituted in place of an objective lens to provide spectral imaging with a 20 µrad angular spatial resolution over a working distance between 3.5 m and 30 m. ​ In indoor and low light environments, a tungsten light source is used to provide controlled illumination for VIS-NIR spectral imaging. For outdoor imaging, daylight is sufficient. For remote configurations, the system is placed on a computer controlled motorised pan/tilt stage that allows convenient imaging of multiples areas on a monument/ object from one position on the ground without moving the instrument. This can enable the remote hyperspectral imaging of areas at inaccessible heights with high spectral and high spatial resolution.

Dataset/Data package (images, spectra, other)

Noncontact (no physical contact)
Nondestructive (no permanent damage or alteration)
Noninvasive (no physical alteration)

ISAAC in-house developed instrument

micro
macro