Design and characterization of thin multiple aperture infrared cameras.
We describe a multiple-aperture long-wave infrared camera built on an uncooled microbolometer array with the objective of decreasing camera thickness. The 5 mm thick optical system is an f/1.2 design with a 6.15 mm effective focal length. An integrated image is formed from the subapertures using correlation-based registration and a least gradient reconstruction algorithm. We measure a 131 mK NETD. The system's spatial frequency is analyzed with 4 bar targets. With proper calibration, our multichannel interpolation results recover contrast for targets at frequencies beyond the aliasing limit of the individual subimages.
Duke University, Durham, North Carolina 27708, USA.
A
A
Portnoy
N
N
Pitsianis
X
X
Sun
D
D
Brady
R
R
Gibbons
A
A
Silver
R
R
Te Kolste
C
C
Chen
T
T
Dillon
D
D
Prather