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In this work, optical properties from normal and cancerous stroma pairs were measured using reflectance-based confocal microscopy. Our results show that the scattering coefficient of cancerous stroma is significantly lower than that of normal stroma, suggesting that the decreased scattering in cancerous stroma may provide a possible indicator for differentiating normal and cancerous stroma.
A nickel complex constructed by the ligand: imidazole has been synthesized, using solvent evaporation method its single crystal was successfully obtained. Its structure has been determined by means of X-ray single crystal diffraction. Its third-order nonlinear optical property has been studied using Z-scan technique with 20 picosecond (ps) pulses at wavelength 1064 nm. Its molecular second hyperpolarizability...
There are lots of ions Cr3+ in dichromated gelatin (DCG) after exposure and processing. Since the density distribution of Cr3+ is proportional to the exposure of light, distribution of Cr3+ will be sinusoidal. Meanwhile, the ions or molecules of other materials are distributed uniformly in a certain range around Cr3+. Therefore, the distributions of positive and negative charges will be unequal, and...
Terahertz time-domain spectroscopy is a newly developed technique, which can provide a direct fingerprint spectroscopy of the molecular structure or conformational state of a compound. The relationship between the optical activity of some amino acids and their THz spectroscopy is presented. Based on their THz spectroscopy these amino acids are precisely clustered into three kinds: L-s D-s and DL-s...
This paper proposes a method called Jump method for optimization of optical thin films. The method is a kind of hybrid approach. It is the combination of local search strategy using modified Coordinate-Wise Algorithm and global search strategy using modified Evolutionary Algorithm. Jump method was successfully applied to the design of a dielectric beam splitter. The result indicates that Jump method...
Based on the carrier rate equations and the travelling wave equations for the forward and the backward optical fields in vertical cavity semiconductor optical amplifier (VCSOA), a set of differential equations in terms of the perturbations of the optical fields and the carrier density in the cavity are derived by employing the small signal analysis. With the use of these equations, we have investigated...
Ball Pressure test is an important experiment which assesses the heat endurance of thermoplastic materials in lots of product safety standards, and it is also often used in laboratory proficiency testing experiment. The test result is determined by the valid diameter of indentation at the tangent points, not the complete indentation. At present most tests are based on experience, and are subjected...
The detection of CH4 gas is very important for the prediction of fire in mine. In this paper a technology of CH4 sensor on the disturb mode of optic fiber is introduced. It is showed that CH4 can be detected by the flow of light energy in optic fiber, which is caused by the disturbing technology. The experiments showed that the sensibility and the selectivity for the detection of CH4 are researched...
Two kinds of sampling methods of optics integrating sphere diffuse reflectance chamber and optical fiber diffuse reflectance probe were employed to collect the near-infrared spectra of 72 fresh lean pork meat samples, respectively. The amount of fat, protein and water in pork meat were determined by the national standard analysis methods as reference. The quantitative analysis models of the above...
The application of spectroscopic techniques in optical biosensing is investigated to realize in situ monitoring of the changes in the optical properties of biomaterials with high sensitivity. In this study, high-resolution optical reflectometry is demonstrated to be an effective approach to measure the dynamic changes in the refractive index of the targeted material. The technique can provide important...
The system adopted optical sensor in order to acquisition parameter of liquid-level changes, the collected optical signals were amplified by optical amplifier directly after photoelectric conversion ,the specific liquid-level can be display or printing after data handing by single chip. This kind of system was used to check the liquid -level in inflammable and explosive oil field.
Traditional large-size direct-illumination structures for liquid crystal display (LCD) do not contain light guide plates. Though the uniformity meets the demand of LCD module, the whole thickness of the illumination system is difficult to reduce. With the development of white light emitting diode, many changes can be introduced in LCD for improving performances of system. In this paper, a design method...
The paper presents excited gallium (Ga*) emission at 403.2 nm and 417.2 nm by optical emission spectroscopy (OES) during GaN growth in electron-cyclotron-resonance plasma enhance chemical vapor deposition (ECR-PECVD). At the same time, we investigated the spectroscopy of simple nitrogen plasma without TMG source as a function of microwave power. In this paper, we tentatively conclude that N* plays...
Tunable diode laser absorption spectroscopy (TDLAS) is a technique measuring the concentration of trace-gas, the gas concentration is in the sub-ppm (part-per-million) range. Experiment results show that the main part of system noise is interference fringes originating from multiple reflections between surfaces in optical components, so-called etalon effects. This work investigates the basis principle...
In this article, a three-axis Ultraviolet Optical Sensor (UVOS) is designed, which can solve the problem of attitude determination for large field observation in the near-earth orbit. By applying an irregular optical system, i.e. the reflecting arrays and combined optical system, a circular large field of view is divided into 8 sub-fields. UVOS will provide the three-axis attitude information and...
Acupoint was the reaction of viscera and its optical parameter was an important characteristic of tissue. In this work, in order to discuss specificity of acupuncture on the response of qi and blood in human body, we compared the diffuse reflectance of Taichong (LV3), Taibai (SP3), and Chongyang (ST42) before, during and after menstruation. All the acupoints had the same shape of the spectrum and...
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