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Our laser and ultrasonic-based technologies provide non-contact diameter measurements for a wide range of materials. Our accurate suite of tools cover outside diameter (OD), ovality (eccentricity), wall thickness (coating thickness/material thickness), concentricity, inside .These two axes of measurement are coplanar and perpendicular to each .Advantages of non-contact measurement with displacement sensors include their non-destructive technique, ability for single-sided continuous thickness measurement, ability to . To measure the thickness (d) of a thin film, the complex refractive indices and incident angles should be known in advance.The total reflectance at each wavelength according to d can be calculated using such .
Filmetrics ® F54-XY-200 Film Thickness Measurement Mapping Instrument. The F54-XY Series are automated benchtop mapping systems for measuring film thickness, refractive index, reflectance, absorption, and surface . This paper is devoted to the simultaneous application of two spatiotemporally resolved optical techniques capable of liquid film thickness measurements, namely Planar Laser-Induced Fluorescence (PLIF) and Brightness-Based Laser-Induced Fluorescence (BBLIF), to co-current downward annular gas-liquid flows.
For the prompt detection of incorrect thickness of aluminum strips, optoNCDT laser triangulation sensors are used as modern alternative solution to isotopic measuring systems. At the measurement location, the sensors are mounted opposite to each other, above and below the conveyed aluminum strip. . In film production inline thickness .
The interfacial wave structure of the liquid film in both upward and downward annular gas-liquid flows in an 11.7 mm pipe were investigated using the Brightness Based Laser Induced Fluorescence . In this paper the liquid film thickness measurement in a Taylor flow regime using laser-induced fluorescence is detailed. The effect of gravity on the film thickness for mini channels of three different diameters (1.5, 2.1 and 3.1 mm) are presented in the study. The variation of film thickness along the slug length is also studied.The use of laser-induced water Raman backscatter for remote thin oil film detection and thickness measurement is reported here for the first time. A 337.1-nm nitrogen laser was used to excite the 3400-cm−1 OH stretch band of natural ocean water beneath the oil slick from an altitude of 150 m. The signal strength of the 381-nm water Raman backscatter was always .This paper presents the development and implementation of a Dual Emission Laser Induced Fluorescence (DELIF) technique for the measurement of film thickness and temperature of tribological flows. The technique is based on a ratiometric principle that allows normalization of the fluorescence emission of one dye against the fluorescence emission of a second dye, .
A new technique has been developed that employs highly focused laser beams for both generating and detecting thermal waves in the megahertz frequency regime. This technique includes a comprehensive 3-D depth-profiling theoretical model; it has been used to measure the thickness of both transparent and opaque thin films with high spatial resolution. Thickness .One of Acuity's existing customers wanted to be able to measure the thickness of a clear and semi-transparent film online. By using the white light confocal chromatic CL4 MG35 probe on a CCS Prima controller, the customer was able to hold +/- 0.6 microns of thickness accuracy. For thickness measurement in W films, theory and simulation show that optimizing the pump and probe laser wavelengths, which determine the intensity and shape of the ultrasonic signal, is critical to improving measurement sensitivity, while for Au film measurements, where acoustic-induced beam distortion is dominant, the signal intensity can . Developed a film thickness measurement system on transparent substrate based on spectral interference ellipsometry. . The mode-locked erbium-doped fiber femtosecond laser output 100 mW of optical power following self-similar amplification. The central wavelength of the laser was 1550 nm, whereas the full width at half maximum was 40 nm. .
We verified the proposed measurement method for glass and plastic films using the laser confocal reflection sensor. Furthermore, by developing a large-are thickness measurement system, the thickness uniformity of the hard coating on PET film were verified and the results were compared with the thickness gauge. The
On the other hand, it is possible to measure a thicker film thickness. According to Fig 8, the 50 µm core diameter fiber can measure a film thickness up to approximately 1.5 mm. However, with a 80 µm core diameter fiber, it is possible to measure film thickness up to approximately 2.5 mm (Fig. 9). J. of the Braz. Soc. of Mech. Sci. & Eng . Gstoehl et al. [10] utilized a non-intrusive optical method to measure the film thickness outside the 19.05 . Measurement of falling film thickness around a horizontal tube using a laser measurement technique. Heat Transfer Eng., 25 (8) (2004), pp. 28-34. Crossref View in Scopus Google Scholar The application of surface acoustic waves (SAWs) for thickness measurement is presented. By studying the impact of film thickness h on the dispersion phenomenon of surface acoustic waves, a method for thickness determination based on theoretical dispersion curve v(fh) and experimental dispersion curve v(f) is developed.The method provides a series of . If the thickness of the film changes, the laser beam’s optical path changes with it, causing a displacement of its imprint on the scope. This displacement is a direct measure for the film thickness.
The development of 3D laser scanning technology provides a new solution for measuring the road surface profile , and thus makes it possible for large-scale water-film thickness estimation. Table 1 compared the specifications of the three different water-film detection methods (in-pavement sensor, roadside sensor, and 3D laser scanning). The determination of thickness has a fundamental importance in all fields in which the implementation of films and coatings are required and takes a crucial role in the electroplating sector.Noncontact high precision thickness measurement systems utilizing laser interferometry and spectrum interferometry.Experiments in Fluids 28 (2000) 355±359 Ó Springer-Verlag 2000 Measurement of liquid film thickness using a laser light absorption method A. A. Mouza, N. A. Vlachos, S. V. Paras, A. J. Karabelas 355 Abstract A photometric technique for ®lm .
The use of laser-induced water Raman backscatter for remote thin oil film detection and thickness measurement is reported here for the first time. A 337.1-nm nitrogen laser was used to excite the 3400-cm(-1) OH stretch band of natural ocean water beneath the oil slick from an altitude of 150 m. The . The thickness of the lubricant film measured in the experiment is about 35.2 μm and the cover slip thickness is about 126.4 μm, which is same as the former measuring result. Download: Download full-size image
The PSRI method for thickness measurement enables us to measure thicknesses in a very wide range of 10 μm to \(3\) mm and with a good precision of about 3 μm. The advantages of this method .
In addition, film thickness measurements from 5 to 400 µm with 1% accuracy are demonstrated. . This paper presents temperature-sensitive laser-induced fluorescence measurements of Fluorescein .
experimental film thickness measurement technique is one example of the desired methods, and here a laser focus displacement instrument (LFD) is explored as a solution. An LFD utilizes the .
systems measure film thickness of up to several mm, surpassing ellipsometers, whose thickness measuring tops out at 250 µm. The systems provide micron-precision thickness measurements as well as surface roughness analysis and imaging of photoresist coating (Figure 5). Measurements are obtained in real time, even, if
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laser film thickness measurement|laser material thickness