10 October 2017 Effect of brittle scratches on transmission of optical glass and its induced light intensification during the chemical etching
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Abstract
Chemical etching experiments are carried out to expose and change the morphology of multiple scratches and single scratches in a set of K9 glasses, during which the transmission of some glasses is measured. The results show that brittle scratches have an influence on the transmission, and the transmission decreases at first and then increases obviously with the increase of etching time for the glass with a high density of cracks. The scattered field distribution around trailing indent crack(s) and the transmission of the glass with a scratch etched deeply (adjacent cracks have coalesced with each other) are simulated under different parameters. Using finite-difference time-domain (FDTD) algorithm, the light intensification effect around two single-evolving scratches and two adjacent cracks with different parameters are simulated, respectively. The results indicate that the position with the maximum light intensity changes for the glass with a scratch and its light intensity enhancement factors (LIEFs) will generally decrease as the etching process progresses. Compared with the morphology evolution of a scratch during the etching process, the changing mechanisms of transmission and LIEFs are revealed. This work will contribute to the improvement of service performance of optical glass by chemical etching process.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Huapan Xiao, Huapan Xiao, Hairong Wang, Hairong Wang, Zhi Chen, Zhi Chen, Guanglong Fu, Guanglong Fu, Jiuhong Wang, Jiuhong Wang, "Effect of brittle scratches on transmission of optical glass and its induced light intensification during the chemical etching," Optical Engineering 56(10), 105101 (10 October 2017). https://doi.org/10.1117/1.OE.56.10.105101 . Submission: Received: 19 May 2017; Accepted: 15 September 2017
Received: 19 May 2017; Accepted: 15 September 2017; Published: 10 October 2017
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