Bo Cai, Huacai Chen
The value of PH and conductivity of meat were studied as two indicators of freshness, the relationship between PH and conductivity with freshness were obtained by adopting least squares fitting algorithm, and both these indicators can well characterize the relationship of freshness in the permissible error range. The models to predict the value of PH and conductivity based on near-infrared reflectance spectroscopy were established. The correlation coefficients R2 were 83.43% and 84.79%, RMSECV were 0.215 and 0.0703 for PH and conductivity of calibration model, respectively. Test the external...
TC2 Symposium 2010
· TC2
· 2010
· Download
Zhang Bao-wu
Deposition of Cr for nano-grating structure is examined from a wave-mechanical perspective, focusing on the effects of laser power. The result shows that considering the wave character of Cr atom, the focal plane will vary with laser power. So in order to obtain good nanogration structures, it is better to locate the substrate at the focal plane according to different laser power. When the focal plane coincides with the Gaussian center, the nanograting has good structure quality in range of [-0.2, 0.2] in y direction, while beyond that the structures will diffuse, and even disappear. The...
TC2 Symposium 2010
· TC2
· 2010
· Download
Bernhard G. Zagar
Applying laser–speckle techniques in the material sciences as well as in methods to characterize surface conditions of specimen has become the method of choice especially if a non–contacting principle is sought. This is almost always the case for specimen that are small in at least one dimension as for example in the material testing of foils, fibres or micromaterials and certainly also if elevated test–temperatures are preventing standard gauges.In this paper some widely overlooked sources of errors that — if unavoidable — increase measurement uncertainty beyond the theoretical limit...
TC2 Symposium 2010
· TC2
· 2010
· Download
Zhuoxuan Li, Li Pei, Chunhui Qi, Tigang Ning, Ruifeng Zhao, Song Gao, Wanjing Peng
V-I Transmission Matrix Method(VITMM) is firstly used for analyzing transmission spectra of two types of fiber grating laser respectively, one is single-cavity resonator formed by a uniform fiber grating and a chirped fiber grating, the other is double-cavity resonator formed by three uniform fiber gratings. Compared with multi-layer method, VITMM could improve efficiency on the premise of accuracy. It is demonstrated that single longitudinal mode output is much easier to be attained in double-cavity fiber grating laser configuration.
TC2 Symposium 2010
· TC2
· 2010
· Download
Dong Yanfei, Ye Junjun, Li Xiaotong, Cao Xiangqun
The present study is focused on the angle measurement with the combination of coarse and fine gratings to simplify the structure of measuring instruments at the same accuracy. A series of experiments were completed by using the He-Ne laser and the gratings with the periods of 83.37um and 6.325um, which shows that the accuracy of the angle measurement is better than 2′. The experimental results indicate that the proposed method is avail to simplify the instrument and improve the accuracy.
TC2 Symposium 2010
· TC2
· 2010
· Download
Chen Xiaoyu, Su Jinbo, Cao Xiangqun, Lin Bin, Yuan Bo
The features of moiré fringe, which is generated by overlapping a circular grating and a linear grating, were studied by ordinal number equation in this paper. Given that the pitch of circular grating is a and that of linear grating is p, the figures of moiré fringe formed by them are hyperbola, parabola and ellipse when a > p, a = p and a < p, respectively. As the pitches of these two gratings are close to each other, magnification of moiré fringe is over 100, which is useful for the measurement of a small displacement. However, the shape of moiré fringe will no longer be distinguishable at...
TC2 Symposium 2010
· TC2
· 2010
· Download
Tongsheng Mou
Photobiological safety related to LED products is currently being addressed in IEC 62471-2006 / CIES009/E：2002. High-power LEDs with attached output optics generally have complex beam profiles. The measurements of weighted radiance and irradiance for maximal exposure related to photobiological safety classification of LED optical radiation are very different from those of traditional luminance/illuminance, and are not tractable yet to any national laboratories. The main features include, a. Photobiological response weighted, e. g. by BLH spectral function b. Field of view related to the...
TC2 Symposium 2010
· TC2
· 2010
· Download
Robert Schmitt, Tilo Pfeifer, Yu Cai, Huchen Zhang, Nils König
In steps of the production chain of carbide inserts, such as unloading or packaging, the conformity test of the insert type is done manually, which causes a statistic increase of errors due to monotony and fatigue of the worker and the wide variety of the insert types. A machine vision system is introduced that measures and inspects the chip-former geometry of the inserts, the most significant insert quality feature in the production line automatically. The proposed two image processing approaches for insert geometry recognition, edge-based and feature-based method, are developed with...
TC2 Symposium 2010
· TC2
· 2010
· Download
Min Qu , Zhixun Huang , Guizhen Lu, Rong Jiang
It was in the microwave frequency range of 8.2 GHz to 12.4 GHz that a polymerhyl methacrylate(PMMA) Double-Prism system has been built. In this system, using a parabolic transmitter antenna and a wave-absorbing slab with a electrically large size slot, the finite-sized quasiparallel Guass beam as light wave can be guarenteed when incident source is sufficiently far. In consequence, discretely sampling from 9.25GHz to 12.25GHz, measured the Goos-Hänchen (GH) effect of total reflection beam for TM polarization at the air gap of width 4mm, where the frustrated internal total reflection(FITR)...
TC2 Symposium 2010
· TC2
· 2010
· Download
Marcin Gnyba, Janusz Smulko, Paweł Wierzba, Andrzej Kwiatkowski
Raman spectroscopy is a powerful and versatile research technique with a broad range of potential applications, which includes laboratory studies, on-line industrial process monitoring and field measurements. Scope of the field applications includes environment monitoring, detection of dangerous or prohibited materials and rapid identification of unknown samples. It stimulates development of dedicated Raman measurement equipment having small size and weight, low supply voltage and reduced power consumption as well as robust construction without moving parts. Moreover, equipment should be...
TC2 Symposium 2010
· TC2
· 2010
· Download