A comparison between thermal lens and conventional optical spectroscopy for monitoring of a photocatalytic process

Abstract

We compare the thermal lens (TLS) and the optical transmission (OT) spectroscopy techniques to monitor the kinetic of a photocatalytic reaction. For this, an OT measurement facility was added to a TLS set-up. The TLS was implemented in a microspatial configuration named thermal lens microscopy (TLM). Methylene blue (MB) in Water solutions were used as test samples within a concentration range in which both techniques show good sensibility. Within this range, the limit of detection obtained by TLM was about one order of magnitude lower than that achieved by OT. The methylene blue concentration evolution with photocatalytic reaction time was measured with both techniques, showing a good agreement between their results. A ZnO thin film deposited on a glass substrate by the spray pyrolysis technique was used as catalyst, and the reaction was induced by UV-violet light.

Transformation of High-speed Photography in Communication Engineering through the "Cheetah" Photography Glasses

“…"Cheetah" camera glasses is based on high-speed photography technology and synchronous data transmission technology, for the traditional large high-speed camera equipment to miniaturize the processing [5]. The glasses is through the high-speed camera [6] for real-time target capture, rapid recording of images, instant playback [7]; the use of wireless energy transmission technology, the corresponding distance, by the receiving end re-converted into electricity, so as to achieve the goal of wireless transmission [8]; in the IEEE1588 PTP precision time protocol, the use of network data packet form to transmit the clock signal, the terminal equipment through the interaction of clock information to achieve High-precision clock synchronization [9], the large high-speed camera for miniaturization and perfect processing, to achieve the purpose of high-speed camera [10].…”