Real-time imaging with THz fully-customized uncooled amorphous-silicon microbolometer focal plane arrays

Reflection 2D real time THz camera to image and identify sugar pellets

“…It resulted in an overestimation of the real reflectivity of samples: this error probably arises from the saturation of the imager when imaging the reference metallic plate. As previously experimentally tested [7], the antenna bolometer response is almost linear within the range of impinging optical power that covers two orders of magnitude. The deviation from linearity considering the optical flux variation due reflectivity difference of plate and pellets does not exceed 4%.…”

On the necessity of standardization for power and sensitivity measurements of terahertz sources and cameras

“…The papers [5] - [7] show that NEP values of THz-FP As are in a range of 25-75 pW around 2.5 THz. Taking NEP value of 75pW, SNR value of 10 0 and overall efficiency (T) of 50%, the minimum power of THz source can be estimated for three THz-FPAs [5] - [7] .…”

“…Taking NEP value of 75pW, SNR value of 10 0 and overall efficiency (T) of 50%, the minimum power of THz source can be estimated for three THz-FPAs [5] - [7] . Recently, INO announces 384x288 FPA with 35 f.lm pitch [IO] .1t is assumed in the estimation that the diameter of collimated beam is the sum of diagonal size of FP A and marginal size of 5 mm on both sides, which well covers THz-FPA.…”

“…Contrary to infrared (IR) region, blackbody radiation in THz region is too weak to use as standard source. However, strong THz sources [2] , [3] , power meters [4] and real-time THz cameras with THz focal plane arrays (THz-FP As i 5] - [7] have recently been developed and produced. It is a good time to make discussions on standardization for power and sensitivity measurements in THz region.…”

Advances in explosives analysis—part II: photon and neutron methods

“…Perov et al developed a new THz imaging scheme based on a backward-wave oscillator and heterodyne detector to detect concealed objects [55]. Simoens et al developed a microbolometer-array prototype for explosives detection at two different frequencies [56,57]. Bolduc et al used a microbolometer-based THz imaging camera to detect a concealed plastic knife [58].…”