  A high temperature superconducting detector was fabricated to capture the
thermal images in room temperature background. The detector was made of
YBa2Cu3O7-{\delta} (YBCO) superconducting thin film deposited on an Yttria
Stabilized Zirconia (YSZ) substrate, structurally modified for high
responsivity performance. A very thin absorber layer was implemented on the
backside of the detector to increase the absorption of the device at infrared
(IR) range of frequencies. To capture thermal images, a movable off-axis
parabolic mirror on XY plane was used for focusing the incoming IR radiation
including the thermal signal of the objects onto the device surface. The
captured thermal images belong to the objects within the temperature range
between 300K and 400K, which correspond to our imaging optics.
