A modified method for calibration of polarimetric components using polarizing interferometry

Abdallah, A. W.; Abdel‐Wahab, May

doi:10.1088/1361-6501/ac0fa7

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…The optical constants of steel and aluminum blocks were determined with the PHE-103 ellipsometer at wavelengths ranging from 250 nm to 1000 nm with a fixed incidence angle of 70 • [21]. It was achieved by measuring the ellipsometric parameters Δ, Ψ, which indicated the phase and amplitude shift in the light beam after it had been reflected from the surface of the test item [22]. These factors were needed to calculate the object's optical constants, such as the refractive index 𝑛 and extinction coefficient 𝑘 [23].…”

Section: Optical Test Methodsmentioning

confidence: 99%

Evaluation of new designed reference blocks for calibration and NDT by optical and ultrasonic techniques

Barakat,

Abdelwahab,

Abdallah

2022

Metrology and Measurement Systems

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Reference blocks are required for ultrasonic calibration and non-destructive testing (NDT). There are already in existence sets of reference blocks constructed according to American Society for Testing and Materials standards, but as the industry evolves, we need more reference blocks with varied designs. In this study, two reference blocks of steel and aluminum are constructed. These blocks have several sets of flat bottom holes (FBH) with different diameters (0.5, 1, 1.5, 2 and 2.5 mm), angles (45 • and 90 • ) and placements. The novel constructed reference blocks are evaluated using the ultrasonic and a displacement measuring interferometer (DMI). They allow for detailed FBH characterization in terms of defining their location, diameter, depth and so on. The two techniques show consistency in the majority of the outcomes. The expanded uncertainty of readings is found to be ±1.4 μm, according to DMI data. The findings show that the newly constructed blocks could be ideal for evaluating a variety of calibration factors including transducer sensitivity, dead zone, defect size, and depth. Furthermore, they can be used in NDT in various industries such as petroleum pipe production, steel manufacturing and so on.

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Section: Optical Test Methodsmentioning

confidence: 99%

Evaluation of new designed reference blocks for calibration and NDT by optical and ultrasonic techniques

Barakat,

Abdelwahab,

Abdallah

2022

Metrology and Measurement Systems

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“…This change occurs due to the nature of the material under test. The general ellipsometry equation is as follows [10]: 𝜌 = tan 𝜓 𝑒 𝑖Δ (1) where 𝜌 is the complex reflectance ratio, Ψ and Δ are the ellipsometric parameters, the change in amplitude and change in phase after reflection respectively.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic and Optical Investigation of Mercury Content Influence on Metrological Properties of Reference Alloy Materials

2023

Journal of Measurement Science and Applications (JMSA)

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Alloys are a mixture of pure metals. They had to be checked for their quality, production, and performance repeatability according to a standard. Thus, reference material may be obtained. The key novelty of this work is the preparation of a reference non-ferrous alloy material according to standards. It has great importance in the restorative materials. In addition, a novel ultrasonic technique was developed. Poly-methyl-methacrylate delay line was designed to modify the used ultrasonic transducers. Alloy powder of platinum modified non-gamma 2 mixed with different mercury percentages (0.5%, 1%, 1.5%, 2%, 2.5% and 3% weight by weight) at room temperature. According to standards, ultrasonic and optical measurements studied the influence of different levels of mercury in the alloy specimens. Ultrasonic velocities and attenuation measurements were carried out using the pulse echo technique. Ultrasonic velocities served to calculate the elastic properties, then to determine the mechanical behavior of the mixed alloy. Ultrasonic attenuation revealed the microstructure change of the mixed alloy. The number of crosslink density and the ultrasonic viscosity are measured. The changes in the optical constants, absorption coefficient, optical band gap, and Urbach energy were measured using the ellipsometric method. Results showed that the mercury content had a great influence on the mechanical properties and the microstructure of the alloys. In addition, 1, 1.5, and 2.5 % W/W mixed alloys were the most mixture that had homogeneous microstructure and could be used as reference restorative materials. The optimum one was the specimen with a mercury content of 2.5 %.

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Developed Method to Evaluate Some Optical Parameters in Gauge Block Measurements Using Ellipsometry

Abdallah

Abdel‐Wahab

El-Bahrawy

2022

MAPAN

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A modified method for calibration of polarimetric components using polarizing interferometry

Cited by 5 publications

References 27 publications

Evaluation of new designed reference blocks for calibration and NDT by optical and ultrasonic techniques

Evaluation of new designed reference blocks for calibration and NDT by optical and ultrasonic techniques

Ultrasonic and Optical Investigation of Mercury Content Influence on Metrological Properties of Reference Alloy Materials

Developed Method to Evaluate Some Optical Parameters in Gauge Block Measurements Using Ellipsometry

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