Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Attention ESVA Patrons:

The Emilio Segrè Visual Archives’ site is moving soon and adopting an open access approach to digital image sharing. Once we have transitioned to the new site in 2021, we will no longer charge for our high-resolution digital images or usage fees (note that we do not hold copyright to all the images in our collections and you will still need to obtain permission for those which we do not own).

If you are working on a long-term project, we advise you to wait until the migration is complete so that you may obtain our copies for free. If you cannot wait, email us at nbl [at] aip.org and we will do what we can to assist you. We will not be offering refunds for past purchases.

For more information, please visit our FAQ page on the Ex Libris Universum blog. 

D'Haenens Irnee F1

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D'Haenens Irnee F1

Jeff Hecht
Image title: 
Irnee D'Haenens working with Spectrum Gap-Filler
Credit line: 
HRL Laboratories

Caption reads: "Spectrum Gap-Filler - a laser-pumped maser which in principle provides the technique to invade the vast unprobed 'gap' of the electromagnetic radiation spectrum has been developed and successfully demonstrated by scientists at Hughes Aircraft Company's research laboratories. The laser-maser technique, which lays open broad areas of communication between radio and light frequencies previously unassailable, provides a new tool for outer-space communication and for probing secrets of matter. Hughes scientist Irnee J. D'Haenens adjusts lens which focuses the coherent optical radiation from a ruby laser (in glass at center) onto the maser ruby crystal (between magnets at right), early 1960s."

Photo date: 
circa 1960
Original format: 
1 photographic print (black and white; 6 x 7.5 inches)
D'Haenens, Irnee J., 1934-