Detector; Detector Electronics; Image Processing Electronics - Fluke TiX660 User Manual

TiX620, TiX640, TiX660, TiX1000
Users Manual

Detector

The thermal imager is equipped with an uncooled
microbolometer FPA detector (uncooled Focal Plane
Array) with a resolution of (1024 x 768) or (640 x 480) IR
pixels. The individual elements of the detector are
microscopically small thin-film resistors on extremely thin
diaphragms arranged a few micrometers above the
silicon read-out circuit in an unsupported manner. The
lens of the thermography system reproduces the thermal
radiation from the scene onto these detector elements
and these detector elements absorb this radiation. The
temperature change of the detector elements results in
signals that can be analyzed electronically, read-out line-
by-line and column-by-column using a read-out circuit.
Use of an uncooled detector ensures the quick availability
of the camera function at start-up (starting time
<30 seconds) and a long mean time to failure (MTTF) in
continuous operation.

Detector Electronics

Detector electronics supply the BIAS voltages and further
actuation signals required for detector operation to ensure
that the analog output signal of the detector is
preprocessed and digitalized.
1-10

Image Processing Electronics

With the help of an FPGA (Field Programmable Gate
Array) and up to two processors, real-time image
processing with the following essential functions
(depending on the equipment) is implemented:
•
detector electronics interface
•
gain and offset correction
•
defect pixel treatment
•
low-pass filtration
•
zoom generator
•
graphics overlay
•
VIS/IR/graphics mixer
•
GigE-Vision interface
•
PC interfaces (Wi-Fi SD Card/USB2.0)
•
video image interfaces (DVI-D, FBAS)