Oldal 50 [50]
] Object
Incident
Radiation
Incident
Radiation
Blocked Radiation
Radiation Radiation
source source
Transmitted Radiation
Figure 2-1. Schematic representation of a generic set-up for the collection of multispectral images
showing the main components reguired.
The following sections offer a series of general recommendations on the selection of these
components for each of the multispectral imaging technigues discussed. A list of typical (but
by no means exclusive) suppliers used currently for such equipment has been included in
Appendix 2 for reference. However, the aim is to provide guidance on the properties
that the equipment selected should possess rather than to recommend particular
items, models and/or brands. This should make the guidelines more widely applicable and
less susceptible to become obsolete should production or availability of certain items/models
cease.
Table 2-1 summarises the equipment required by each imaging technique. As may be
observed, the recording device and standards remain almost constant throughout, whilst the
combination of radiation source and filter (or sets of filters) is altered to allow the study of the
spectral windows of interest. Recommendations for the properties of the camera and
standards are thus made in more general terms for all the techniques concerned, whereas
the radiation sources and filters are discussed more specifically within the requirements of
each particular technique.
Version No. 1.0 Date : 14/10/2013
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