The infrared detection module available from VIGO System integrates heat dissipation systems, an infrared photodetector, optics, signal processing electronics, and other components in a standard package.
This kind of integration renders detectors less susceptible to overbias, electromagnetic interferences, electrostatic discharges, and other environmental exposures. Output signal standardization, enhanced high-frequency (HF) performance, cost reduction, and miniaturization are other benefits of the integration.
VIGO System supplies detection modules that are fitted with an infrared detector. The modules are improved for uncooled temperatures or for temperatures that can be realized with Peltier-cooler operation in the spectral range from 2 to 12 μm. Many circuit designs have been specifically designed to enhance the performance of the modules in a variety of applications.
IR radiation produced by an object is directed towards the active region of an IR detector, creating photoelectric signals that are perceived by the front-end electronics (FEE).
The front-end electronics circuitry is often used to:
- Intensify the signal within the needed frequency band. This can be realized by making sure that the preamplifier noise makes minimal contribution to the ensuing noise of the detection module.
- Protect detector elements from overbias
- Offer ideal conditions to ease the operation of IR detectors (to obtain high sensitivity, a wide dynamic range, and rapid response). This is generally realized with improved constant voltage bias and the current mode of the photoelectric signal readout.
Apart from the front-end electronics, detection modules may also feature extra electronic blocks for signal conditioning, like analog-digital converters (ADC), filters, gain blocks, thermoelectric cooler controllers, and other components.
Programmable detection modules allow users to control several parameters, like bandwidth and gain, even during regular operation. This feature offers completely new possibilities for measuring system designers.
Several switching elements are integrated into a fully analog input circuit, even with an inconsistent, digitally controlled capacitance to offset the transimpedance input stage.
Furthermore, the internal design is analogous to regular detection modules. A key difference is that users can configure a majority of the internal functional blocks.
To offer information regarding the status of the module, the unit is integrated with bias and DC offset monitoring circuits. A system with overload protection or adaptive gain can now be constructed. Modifiable bandwidth can allow users to obtain optimum noise performance for numerous types of signals.
Two models are available in the LabM module series:
- Improved for operation in the spectral range of 2 to 12 µm and modifiable frequency bandwidth ranging from DC up to 100 MHz with an optically immersed photovoltaic multiple junction detector
- Improved for operation in the spectral range of 3 to 6.9 µm and modifiable frequency bandwidth ranging from 10 Hz up to 200 MHz with an optically immersed photovoltaic detector
Smart Manager Software (freeware) and programmable VIGO thermoelectric cooler controller PTCC-01 (sold separately) are needed for accurate operation of the module. Three models of PTCC-01 are available—Basic, Advanced, and OEM.
The LabM series comes complete with both Smart Manager and PTCC-01and is the perfect solution for prototyping and the research and development stage in a wide range of applications.
Source: VIGO System
||Optimal wavelength λopt, µm
||Optical area Ao, mm×mm
||Detectivity D* (λopt), cm·Hz1/2/W
||Output voltage responsivity Rv (λopt, RL=50 Ω), V/W
|| -3 dB Bandwidth
||DC to ≥ 100 MHz
||10 Hz to ≥ 100 MHz