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Ray transfer matrix perturbation for an optical component with aberration

Chinese Optics Letters 2012年第8期10卷 11-13页

作者： Jerry T.Barretto Clark Kendrick C.Go Stein Alec C.Baluyot Department of Physics School of Science and EngineeringAteneo de Manila University Department of Mathematics School of Science and EngineeringAteneo de Manila University

The perturbation theory of matrices is applied to ray transfer matrices （RTMs） to describe an optical component with aberration. A quantitative description of the perturbation extent corresponding to aberration strength is provided using condition numbers and absolute errors for the perturbed RTM. An application to a single small aberration is presented, and the results are compared with those of the diffraction theory of aberrations.

关键词： 080.0080 Geometric optics 080.2720 Mathematical methods (general) 080.2730 Matrix methods in paraxial optics

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Calculation of infrared properties of low emissivity coatings containing metallic flake pigments

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Chinese Optics Letters 2013年第13期11卷 12-15页

作者：袁乐翁小龙邓龙江 State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China

The infrared emissivity of low emissivity coating can be significantly reduced by adding high content concentrations of parallel distributed metallic flake pigment. However, the infrared emissivity is very difficult to calculate by the existing theory models, such as the light scattering theory and traditional Kubelka-Munk radiative transfer model, because of shape and distribution anisotropy of flake pigments. Thus, the low emissivity coating is assumed to be the superposition structure of homogeneous layers and metallic flakes are approximately uniform and parallel arrangement in each layer. Based on geometric optics theory and Kubelka＇s layer model, considering multiple reflection, transmission and absorption of infrared radiation among different layers, the theoretical model is established to calculate the coating emissivity. The facts of binder, pigment concentration and thickness are also systematic discussed. The result shows that the law of influence on infrared emissivity can be correctly simulated by this theoretical model. Transparent binder, high volume concentration of thin flake pigment can facilitate to reduce infrared emissivity. Moreover, this model offers the possibility of predicting the infrared optical properties of coatings by their optical constants.

关键词： 200.0200 Optics in computing 350.0350 Other areas of optics 080.0080 Geometric optics

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