Surface stress measurement by the optical waveguide effect in thermally-tempered float glass

1979 ◽  
Vol 11 (5) ◽  
pp. 259-261 ◽  
Author(s):  
T. Kishii
Keyword(s):  
Optical Waveguide ◽  
Surface Stress ◽  
Stress Measurement ◽  
Float Glass ◽  
Waveguide Effect

Glass Surface Stress Measurement and Digitalization

2017 ◽  
Vol 726 ◽  
pp. 388-393 ◽  
Author(s):  
Jun Feng Li ◽  
Yi Wang Bao ◽  
Song Han ◽  
Yan Qiu ◽  
Fu Qiang Ai
Keyword(s):  
Quality Control ◽  
Nondestructive Test ◽  
Optical Waveguide ◽  
Surface Stress ◽  
Glass Surface ◽  
Stress Measurement ◽  
Test Methods ◽  
Tempered Glass ◽  
Waveguide Effect ◽  
Key Factor

Surface stress measurement is the key factor of the quality control for tempered glass. The nondestructive test of glass surface stress is based on the character of stress birefringence in glass. The basic principle of the measurement and test methods are introduced. The optical waveguide effect of tin-diffused layers plays a key role in prevalent surface stress measurements. The apparatus are compared for optimizing the testing devices. A portable digitalized surface stress meter based on optical waveguide effect is developed, which can work in severe optical conditions and reduce operation difficulty. The calibration record shows good linearity.

Structural features and optical properties of a carbazole-containing ethene as a highly emissive organic solid

2014 ◽  
Vol 2 (6) ◽  
pp. 1004-1009 ◽  
Author(s):  
Yang Liu ◽  
Xin Ye ◽  
Guangfeng Liu ◽  
Yun Lv ◽  
Xiying Zhang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Waveguide ◽  
Structural Features ◽  
Aggregation Induced Emission ◽  
Waveguide Effect ◽  
Organic Solid ◽  
Crystal Fibers

The aggregation-induced emission (AIE) characteristics a carbazole-containing alkene enable its highly blue emissive crystal fibers exhibit optical waveguide effect.

Development of a Bridge-Microcantilever by CMOS Process for Surface Stress Measurement

2009 ◽  
Author(s):  
Shih-Ming Yang ◽  
Chun Chang ◽  
Tsung-I Yin
Keyword(s):  
Scanning Probe Microscopy ◽  
Dna Hybridization ◽  
Surface Stress ◽  
Stress Measurement ◽  
Optical Element ◽  
Cmos Process ◽  
Functional Layer ◽  
Transparent Liquid ◽  
Optical Lever ◽  
Layer Coating

Microcantilever based biosensor have been the recent research interests for its versatility in data acquisition and interpretation. A microcantilever can measure the surface stress generated on any specific functional layer coating on a biochemical sensor. Berger et al. [1] showed the surface stress change by the alkanethiols on a probe. Fritz et al. [2] measured the DNA hybridization and receptor-ligand binding by a microcantilever. The surface stress measurement in the above works is mainly by measuring the microcantilever deflection based on the optical lever technique in scanning probe microscopy; however, alignment and calibration of the optical element for different testing species are by no means trivial. The technique may be futile when operating in non-transparent liquid.

Influence of Preparing of Specimen on Internal Stress Measurement of Aluminum Alloy Thick Plate

2010 ◽  
Vol 97-101 ◽  
pp. 2658-2663
Author(s):  
Kai Liao ◽  
Yun Xin Wu ◽  
Hai Gong
Keyword(s):  
Stress Distribution ◽  
Internal Stress ◽  
Surface Stress ◽  
Thick Plate ◽  
Stress Measurement ◽  
Stress Gradient ◽  
Real Surface ◽  
Measurement Results ◽  
Layer Removal Method ◽  
Internal Stress Measurement

The cut, a main preparing means of specimen, will cause a difference in stress distribution between thick plate and the specimen, so this article focuses on the topic of evaluating impact of the cut on stress measurement results. Firstly, the real surface stress distribution of the plate and specimen were determined by X-ray diffraction (XRD) and FEM. Secondly, according to the specimen dimension and machining procedure, the influence of the cut on internal stress measurement is obtained and compared with the FEM results. The conclusions are as follows: (1) the normal stress of cut plane steeply decreases and the stress gradient descends along with distance away from the cut. The range of distance is approximately one-thickness of specimen. (2) In order to obtain stable and reliable results, the plane size of specimen is taken three times larger than the thickness. (3) The milling processing of layer removal method (LRM) can change the surface stress state of specimen, but the machining effects on residual stresses can be removed by properly choosing milling parameters.

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