When the news told of the discovery of ‘another’ Mona Lisa, Roger Frost visited local inventor Lawrence Robinson of OPUS Instruments.  He learned about the OSIRIS infra-red camera which had been used to verify the find by ‘seeing’ under the paint of paintings.
Follow-up link

OPUS Instruments www.opusinstruments.com.

Tagged infrared, technology, physics, Roger Frost First played on the Science Show 05/02/12