1 - 10 of 12 articles
The ability to see in the dark is a key differentiator in many military scenarios and the development of thermal imaging (TI) systems has provided the military with a battle winning capability. One of the current key thrusts is to be able to detect and identify targets at significantly longer...
Discusses recent progress in technology based on electromagnetic radiation at terahertz frequencies. Considers recent corporate activities and describes technological developments with applications in the physical and life sciences.
Describes the development of low cost optical sensor systems for water quality monitoring developed under the “LOADMON” EU research programme. It uses two laser diodes as the sources: one emits blue light at 405 nm and the other red light at 670 nm. The former excites fluorescence of organic...
Describes a passive, open‐path infrared gas detector that utilises thermal background radiation as the source. Explains its mode of operation, provides a specification and considers its route to market.
Describes the use of a distributed optical temperature sensor, based on fibre Bragg grating technology, to monitor the temperature distribution of helium within a prototype airship.
Describes a unique optical source, the quantum cascade laser (QCL) and its application to gas detection. The instruments can detect both nitric oxide and carbon monoxide at concentrations down to 10 ppb m at atmospheric temperature and pressure with a 1 m absorption path‐length. A QCL operating...
Thermal phenomena that occur in operating integrated circuits can disturb their functioning and even cause failures. In order to prevent such dramatic issues, it is necessary to study these phenomena by developing high‐resolution thermal mapping of electronic devices. This can be done by using...
This paper describes a method of removing noise from time series data records whilst preserving salient features of short duration, such as sharp transitions and significant peaks. A practical example is drawn from fault‐current testing of circuit breakers, for which the scheme was originally...
This paper investigates the feasibility of using the emission intensity of low‐pressure argon and nitrogen gas discharges as the sensing mechanism for a microwave electric field optical sensor probe in microwave resonant cavities. The emission is coupled to a photodiode for detection through an...
Thin films of tellurium dioxide (TeO 2 ) and indium oxide (In 2 O 3 ) mixtures were investigated for γ‐radiation dosimetry purpose. Samples were fabricated using thermal vacuum evaporation technique. The electrical properties of mixed oxides thin films ((TeO 2 ) 1− x (In 2 O 3 ) x , where x =0...
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