Got this from a ham radio guy in my neighborhood who’d passed a couple months ago. I’ve dug it up and I wanna decide what to do with it. I have no idea how it’s supposed to work.
https://i.ibb.co/7zPFXCm/570-B3082-1-DF2-46-F0-BFDD-0-BC9-F91-A0840.jpg (https://ibb.co/8BqV0sZ)
https://i.ibb.co/TWV2Gvr/89-EE451-E-6-B06-4-F01-95-F9-FCE6-AA842-C1-B.jpg (https://ibb.co/Vw79Gj3)
https://i.ibb.co/VYKyw93/028-AD0-F3-B5-D6-4-ABC-A0-A0-B378-AF74518-D.jpg (https://ibb.co/60dhXwN)
https://i.ibb.co/yqG3Bbp/3-EE8-A768-B003-4129-82-FA-5-F25-B9430979.jpg (https://ibb.co/BBd1KSG)
https://i.ibb.co/SQwdKtd/3-F65-F32-D-0-C2-D-4-F5-C-869-B-EAED75640-BB9.jpg (https://ibb.co/Jxjyzvy)
https://i.ibb.co/cwm8QwG/24-B3-D99-C-619-A-4250-AF85-A74-C4-ADDEA59.jpg (https://ibb.co/7Q9pKQw)
https://i.ibb.co/gRjQmVn/6792-AFC2-709-F-4628-9-BE5-66-A69249-C350.jpg (https://ibb.co/bKWYQJf)
https://i.ibb.co/60Yd7nm/7-F23-A3-A4-BF48-42-DE-8-F49-56568959-BB8-C.jpg (https://ibb.co/chJmSg1)
https://i.ibb.co/ZH2cTJs/FEDC816-D-0-E4-B-4145-BD25-74-A5-C41-DEA62.jpg (https://ibb.co/bHbNd3h)
https://i.ibb.co/hmLgYtF/126-BB1-EC-0-A46-41-B2-B5-B2-B223-E7-BC4620.jpg (https://ibb.co/FDmhHj4)
https://i.ibb.co/mRNMjYJ/732-E7082-BC58-4-B8-D-AEA3-5-CB91-D7-DE6-A3.jpg (https://ibb.co/x2FRkch)
Only info I can really find is this -> https://ntrs.nasa.gov/citations/19810053344

I discovered a paper that seems to describe work on this device for the Department of Defense:
https://apps.dtic.mil/sti/tr/pdf/ADA091840.pdf

It has somethnig to do with two-dimensional Fourier transforms of infrared images.

DEFT stands for Direct Electronic Fourier Transform.