DARPA has released a broad agency announcement (BAA) for a program with an ultimate goal of a SWIR (Short Wave Infra Red) camera weighing only 10-grams total - that means 10-grams for the camera, lens, detector, and electronics. Fortunately, the winning contractor lab(s) won't have to promise to reach that goal in the first phase!
DARPA has crafted the goals so that they become more and more aggressive as the program goes on (as usual). There are also different requirements for medium and long wave IR camera systems as well as different applications (miniature UAVs and head-mounted).
That being said, the goals are beyond challenging. A report at Defense Tech has a quote saying that "it will take a radically new approach". I'd say that is an accurate assessment myself. It will be very interesting to see what the contractor labs come up with.
The information packet can be found here (PDF download).
(Hat tip: Defense Tech)