The effect of the manufacturing quality of the optical components on the accuracy of the measurement of refractive index by the goniometer method

2012 ◽  
Vol 54 (12) ◽  
pp. 1372-1377
Author(s):  
G. N. Vishnyakov ◽  
S. V. Kornysheva
Keyword(s):  
Refractive Index ◽  
Optical Components ◽  
Manufacturing Quality

scholarly journals Research on the Manufacturing Quality of Co-Cured Hat-Stiffened Composite Structure

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2747
Author(s):  
Xiangwen Ju ◽  
Jun Xiao ◽  
Dongli Wang ◽  
Cong Zhao ◽  
Xianfeng Wang
Keyword(s):  
Composite Structures ◽  
Sound Pressure ◽  
Integration Method ◽  
Complex Geometry ◽  
Sound Field ◽  
Thickness Measurement ◽  
Curing Process ◽  
The Finite Element Method ◽  
Manufacturing Quality

The stringer-stiffened structure is widely used due to its excellent mechanical properties. Improving the manufacturing quality of stringer-stiffened structure which have complex geometry is important to ensure the bearing capacity of aviation components. Herein, composite hat-stiffened composite structures were manufactured by different filling forms and bladders with various properties, the deformation of silicone rubber bladder in co-curing process was studied by using the finite element method. The thickness measurement at different positions of the hat-stiffened structure was performed to determine the best filling form and bladder property. Moreover, in view of the detection difficulties in R-zone of stringer, numerical simulation was performed to get the sound pressure and impulse response of at the R-zone of stringer by Rayleigh integration method, and an effective equipment which could stably detect the manufacturing quality of R-zone was designed to verify the correctness of sound field simulation and realize the detection of stringer. With the optimum filling form and bladder properties, hat-stiffened composites can be manufactured integrally with improved surface quality and geometric accuracy, based on co-curing process.

Formation and Properties of Porous Si Superlattices

1994 ◽  
Vol 358 ◽  
Author(s):  
M.G. Berger ◽  
R. Arens-Fischer ◽  
St. Frohnhoff ◽  
C. Dieker ◽  
K. Winz ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Doping Level ◽  
Layer Structure ◽  
Optical Data ◽  
Type I ◽  
Optical Components ◽  
Porous Layers ◽  
Long Term Stability ◽  
Transmission Electron

ABSTRACTPorous silicon superlattices (PS-SL) were investigated by transmission electron microscopy (TEM), scanning electron microscopy (SEM), spectroscopic ellipsometry and reflectance spectroscopy. Type I superlattices were formed by periodically changing the current density during the etch process. The quality of the interface between layers of different porosity depends on the quality of the silicon substrate. Optical components such as Bragg reflectors or Fabry-Perot filters were designed using the optical data of single porous layers. A good long term stability of the layers is achieved by using thermal oxidation steps. Type II superlattices were formed on substrates with layers of alternating doping level. The more complex layer structure of these superlattices is explained by the selectivity of the etch process on the doping level.

Forecasting Manufacturing Quality and Optimizing Product Robustness Using Process Capability Data

Manufacturing ◽  
2003 ◽  
Author(s):  
Daniel Kern ◽  
Xiaoping Du ◽  
Agus Sudjianto
Keyword(s):  
Probabilistic Approach ◽  
Process Capability ◽  
Simulation Models ◽  
Design Parameters ◽  
Set Design ◽  
Manufacturing Quality ◽  
Design Engineers ◽  
Parameter Values ◽  
Manufacturing Variation

A company’s success is highly dependent on its ability to manufacture quality products. Designing products that can be manufactured to meet customer needs with an acceptable level of variation is challenging because design engineers are often unfamiliar with the company’s manufacturing capability or are unable to effectively use the capability data to improve a design. The authors present an approach to forecast the manufacturing quality of a product and optimize its robustness while it is being designed. The system comprises a database that stores process capability data and simulation models to simulate process capability data when actual, appropriate data are nonexistent. These data and tools are used with a new probabilistic approach through the inverse reliability strategy to optimize the robustness of a design by locating values of design parameters that enhance the performance of the design and are insensitive to manufacturing variation. Design engineers can use this approach to set design parameter values that will improve the functionality of the product while ensuring it can be produced with high capability. This approach is demonstrated with a design example of an engine valvetrain.

Recent advances in the quality of CVD diamond optical components

1999 ◽  
Author(s):  
Christopher J. H. Wort ◽  
Charles S. J. Pickles ◽  
A. C. Beale ◽  
Charles G. Sweeney ◽  
Mark R. McClymont ◽  
...  
Keyword(s):  
Cvd Diamond ◽  
Optical Components ◽  
Recent Advances

Numerical Prediction of Manufacturing Error in Sliding Panel Structure

2010 ◽  
Vol 102-104 ◽  
pp. 675-680 ◽  
Author(s):  
Zhi Xin Li ◽  
Shi Ming Ji ◽  
Xun Lv ◽  
Si Chang Xiong ◽  
Shen Shun Ying ◽  
...  
Keyword(s):  
Numerical Study ◽  
Single Point ◽  
Numerical Prediction ◽  
Interfacial Coupling ◽  
Coupling Interaction ◽  
Oil Film ◽  
Manufacturing Error ◽  
Manufacturing Quality ◽  
Supporting Element

The present work focuses on the numerical prediction of the manufacture quality of a sliding panel structure, in which the mobile components are floating on the immobile components and the 0.002mm thickness oil-film clearance between the mobile and immobile components. The interaction between them is the interfacial coupling interaction. A single-point spring-damping supporting element is introduced to simulate this type of interaction traditionally, in which the torsion of the mobile components is increasing with the supporting element reduced. To analogy the interfacial coupling interaction, the finite centrality supporting method is introduced to study the thin oil-film effect between the mobile and immobile components. And the manufacturing quality is predicting through the numerical study. Compared with the results derived from the numerical and experiments, the manufacturing error is in accordance with each other.

scholarly journals The Effect of Coloring on the Transmission of Electromagnetic Radiation in Eyeglass Lenses

2018 ◽  
Vol 55 (4) ◽  
pp. 640-643
Author(s):  
Pawel Pietrusiewicz
Keyword(s):  
Refractive Index ◽  
Solar Radiation ◽  
Electromagnetic Radiation ◽  
Uv Radiation ◽  
Infrared Radiation ◽  
Main Criterion ◽  
Protection Factor ◽  
Eye Protection ◽  
Sun Protection Factor

The paper presents the results of investigations on the transmission of electromagnetic radiation from the UV-Vis ranges of organic colored spectacle lenses. All investigated lenses had the same refractive index and one of them differed in the SPF (sun protection factor). The main criterion for the quality of colored eyeglass lenses is eye protection against harmful UV radiation, infrared radiation and excessive exposure to solar radiation. The lenses were measured using a Varian UV-Vis Cary model 300 spectrophotometer. These studies showed that the best protection against this radiation is the choice of coloring in a color other than blue, and that as the power of the colored lens increases, protection against harmful UV radiation decreases.

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