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Fabrication of Ruby thin film for temperature indicator application
Hiroaki Aizawa,Kenichi Ito,Sayaka Takahashi,Shuji Komuro,Yukari Miyazaki,Tooru Katsumata 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Chromium doped sapphire (Ruby) films have been fabricated on Si substrate by laser ablation, and their fundamental optical property and thermal characteristics are evaluated for temperature sensor application. The red emission near 700 nm which originates from 3d transition in Cr<SUP>3+</SUP> ions was clearly observed from the Ruby films. The split of PL peak, originated in 3d-orbital of chromium ion, is also clearly observed from Ruby films. Temperature dependence of PL spectrum from ruby films was measured under Ar laser excitation. PL intensity and PL peak positiongreatly vary with temperature ranging from 293 K to 443 K. To take the advantage of this phenomenon, the temperature sensor with calibration free can be developed.
Effectiveness of Solution with 5% Detergent for Cleaning Transnasal Esophagogastroduodenoscopy Lens
Yoshinori Komazawa,Mika Yuki,Nobuhiko Fukuba,Yoshiya Kobayashi,Hitomi Ishitobi,Sayaka Nakashima,Makoto Nagaoka,Yoshiko Takahashi,Toshihiro Shizuku 대한소화기내시경학회 2021 Clinical Endoscopy Vol.54 No.2
Background/Aims: Unsedated transnasal esophagogastroduodenoscopy (EGD) is affected by a poor scope lens-cleaning function. We have previously reported good, albeit limited, effects of an oolong tea washing solution; here, we evaluated the effectiveness of a 5%lens cleaning solution for cleaning an EGD lens. Methods: Five percent lens cleaning solution (C), 5% dimethicone solution (D), and distilled water (W) were prepared. Study I:Lenses were soiled with pork grease, washed with each washing solution, and their image quality was judged. Study II: Patients (n=996)scheduled for transnasal EGD were randomly assigned to the C- or W-group. Lens cleanliness level, washing solution volume used,and endoscopist stress due to lens contamination were determined. Results: Study I: The image quality of the lenses washed with (C) was significantly superior. (D) was clinically unsuitable because ofspray nozzle clogging. Study II: Lens cleaning in the C-group was significantly superior (p<0.0001) and the solution volume requiredwas significantly reduced (p<0.0001), while endoscopist stress was also lower (p<0.0001). Conclusions: For transnasal small-caliber EGD, the present 5% lens cleaning solution provided good visibility. It features a highdetergency level and is simple to formulate for therapeutic endoscopy applications, such as endoscopic submucosal dissection.