Abstract

A visualization method for monitoring minor metal crack propagation is presented in this paper. Through CdS@ZnS core-shell quantum dots (QDs) enhanced emission of photoluminescence (PL), this crack detection method provides a visualization signal in real time and through a noncontact fashion. The crack of the CdS@ZnS core-shell QDs-epoxy resin kept a synchronous propagation with the metal crack. Detection of the tip growth in the film layers demonstrated that the actual crack propagation on the metal surface could be deduced from the tips in the film layers. The fluorescence peak tended to increase along the crack from the initial opening to the tip. Crack width as small as 10 μm can be detected with a precision of 0.1 μm and the minimum crack tip width of the QDs-epoxy resin was measured as 0.72 μm.

© 2015 Optical Society of America

Numerical wave propagation in ImageJ

Pablo Piedrahita-Quintero, Raul Castañeda, and Jorge Garcia-Sucerquia
Appl. Opt. 54(21) 6410-6415 (2015)

Multi-spectral infrared spectroscopy for robust plastic identification

Abraham Vázquez-Guardado, Mason Money, Nathaniel McKinney, and Debashis Chanda
Appl. Opt. 54(24) 7396-7405 (2015)

Interference and differentiation of the neighboring surface microcracks in distributed sensing with PPP-BOTDA

Dewei Meng and Farhad Ansari
Appl. Opt. 55(34) 9782-9790 (2016)

Optical condensers formed in wet-mounting setup

Darshan B. Desai and Luis Grave de Peralta
Appl. Opt. 54(12) 3580-3587 (2015)

Investigation of micro-injection molding based on longitudinal ultrasonic vibration core

Zhongjun Qiu, Xue Yang, Hui Zheng, Shan Gao, and Fengzhou Fang
Appl. Opt. 54(28) 8399-8405 (2015)