The Corescan System

Corescan’s Hyperspectral Core Imager Mark III (HCI-3) integrates reflectance spectroscopy, visual imagery and 3D laser profiling to map the mineralogy and geochemistry of drill core, rock chips and other geological samples. Designed in-house and proprietary to Corescan, the system offers ultra-high spectral and spatial resolution. Download General Flier / Espanol

System Overview

The HCI-3 system itself consists of not only one of the most advanced hyperspectral spectrometers available, but also high resolution digital true-color photography and high resolution laser profilometery (sensor specification table below).

HCI-3 operates across the VNIR and SWIR portion of the electromagnetic spectrum from 450nm to 2500nm at a spectral resolution (FWHM) of 3.5nm. This wavelength range covers the spectral region where a wide range of fundamental rock-forming and hydrothermal alteration minerals exhibit specific, unique combinations of spectral absorption features.

High quality optics focus the spectral measurement to a 0.5 mm point on the core, maximizing signal and minimizing spectral mixing. The revolutionary design of HCI-3 reduces the uncertainties associated with spectral mixing inherent in traditional measurement systems, thus providing a ‘near pure’ spectral signature at each point on the core, with none of the mixing issues inherent to larger pixel-size systems. Corescan acquires, processes and maps over 100,000 spectra per metre of scanned core.

A spectrally calibrated RGB camera provides a high resolution visual record of the core at 60 micron pixel size. Measurement of core surface features, texture and shape is complemented using a 3D laser profiler with a surface profile resolution of 20um. The system comprises a scan unit housing the optics, spectrometers, cameras and 3D profiling sensors; a translation table with conveyor driven core tray loading system and a high speed data acquisition, processing and control computer.