NIREOS | HERA IPERSPETTRALE | USER TECHNICAL MANUAL 1.2
3 | Page
1. Introduction
1.1 Brief Description
The HERA IPERSPETTRALE is a novel hyperspectral camera, able to acquire spectral reflectance,
transmittance, and fluorescence images over a broad spectral coverage (400 nm – 1000 nm) with a high
spectral resolution and sensitivity. It is based on a Fourier-Transform approach: an ultra-stable
interferometer in front of the bidimensional CMOS sensor creates two replicas of the light field with a
relative variable delay, generating high-contrast interferograms at the single-pixel level. The software
then computes the Fourier Transform of the resulting interferograms, yielding the continuous-intensity
spectrum of the light at each pixel of the image.
Being based on a Fourier-Transform approach, the HERA IPERSPETTRALE has prominent advantages
over dispersive devices: (i) higher signal-to-noise ratio in a readout-noise-dominated regime (the
Fellgett multiplex advantage); (ii) higher throughput, due to the absence of slits (the Jacquinot
advantage); (iii) flexible spectral resolution, which is adjusted at will by varying the maximum scan delay.
1.2 Information, Warnings and Safety Instructions
1.2.1 Hazardous Voltage
The HERA IPERSPETTRALE can generate high output currents at high voltages. They may cause serious
or even lethal injury if used improperly. Therefore, the equipment should only be operated by
personnel, which is adequately trained and educated to prevent any improper use. Please follow
general accident prevention rules:
•Never touch any part that might be connected to an output with a high voltage.
•Do not connect products from other manufacturers to the output connectors.
•Never use equipment that is damaged in any way.
•The HERA IPERSPETTRALE contains no user serviceable parts. Never open the case. Procedures
which require opening the case must only be carried out by authorized, qualified and trained
personnel.
