Advanced glossmeters for industrial applications

Kuivalainen, Kalle; Oksman, Antti; Juuti, Mikko; Myller, Kari; Peiponen, Kai–Erik

doi:10.1007/s10043-010-0043-2

Cited by 7 publications

(7 citation statements)

References 5 publications

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“…The prototype of a sensor that we suggest in this article is based on the idea that a roughened glass can be used for the identification of liquids, namely using the concept of refractive index matching between the roughened glass and the immersion liquid [19]. For this purpose, we have designed and tested in laboratory conditions a modified sensor head mounted on a commercial hand-held glossmeter [17] (MGM-Devices, Finland). The modification includes implementation of a roughened glass in the sensor head.…”

Section: Methodsmentioning

confidence: 99%

“…The prototype is based on a refined sensor that was originally developed for gloss inspection from rough surfaces in field measurement conditions, such as cold-rolling products in metal industry [17]. We have modified such a glossmeter by implementing a removable sensor head that was used in laboratory conditions for the detection of authentic and adulterated diesel oils.…”

Section: Introductionmentioning

confidence: 99%

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A prototype of an optical sensor for the identification of diesel oil adulterated by kerosene

Kanyathare

Kuivalainen

Räty

et al. 2018

J. Eur. Opt. Soc.-Rapid Publ.

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Background: Liquid fuel adulteration has several far-reaching impacts such as environmental pollution. A widespread practice is typically the adulteration of diesel oil by kerosene. The relatively cheap price of kerosene is probably the most important reason for its usage in illegal adulteration. Herein, we demonstrate the use of a prototype optical sensor for efficient tracking of adulterated diesel oil. Methods: In this study, a prototype of an optical sensor for screening of fake diesel oil is proposed. The device exploits the phenomenon of laser light reflection from a fuel film over a roughened glass plate. The sensing mechanism of the devise is based on the refractive index mismatch between the glass and the fuel sample, and the wetting property of the fuel film over the roughened surface. For the sake of comparison, the refractive index for each of the fuel samples was measured at room temperature with the aid of an automatic temperature controlled Abbe table refractometer. The sensitivity of this prototype optical sensor was tested using training sets of diesel oil samples adulterated with low concentrations of kerosene. Results: Originally, a commercial handheld glossmeter, with a new innovation of a removable sensor head for liquid inspection is presented as a prototype sensor for the screening of possible adulteration of diesel oils with kerosene. The significant difference in the signal readings obtained from carefully prepared training sets of adulterated diesel oil composed of low percentages (5-15%) of kerosene has proven the high sensitivity of the developed sensor. Conclusions: The ability to detect low concentrations of kerosene in diesel using the newly developed hand-held prototype sensor proves its high sensitivity compared to a high-accuracy Abbe refractometer. We envisage that this proposed sensor could, in the future, be made accessible to the authorities as a mobile fake fuel measurement unit.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A prototype of an optical sensor for the identification of diesel oil adulterated by kerosene

Kanyathare

Kuivalainen

Räty

et al. 2018

J. Eur. Opt. Soc.-Rapid Publ.

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“…However, for skinrelated study, the utilization of the handheld glossmeter is demonstrated in this paper for the first time. Different forms of the DOE-based glossmeter exist for industrial applications [14]. For example, the DOE-based sensor has been used in the detection of extremely low gloss of 0.0079 G from nano-carbon surfaces [15].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the low angle of incidence and the smaller spot size help to achieve a more compact device. More importantly, the integration of the device to a computer also allows the scanning of some skin length [14], a feature which is an additional advantage over other devices for skin gloss determination [5,6] to the best of our knowledge. Examples of such scanned profiles are shown under the results section.…”

Section: Introductionmentioning

confidence: 99%

Scanning of skin gloss by a diffractive optical element-based handheld glossmeter

Asamoah

Peiponen

2018

Opt Rev

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Skin specular gloss (referred to as "gloss'') determination is important in dermatology and cosmetic industry as it gives an indication of the skin health and beauty. Its accurate determination is, therefore, necessary. Commercially available glossmeters typically employ large incidence angle geometry, large illumination area, and fixed point measurements making them impractical regarding measurement of curved and complex non-planar objects or surfaces as well as low gloss regime such as the skin. In this study, we have demonstrated the novel application of a diffractive optical element-based handheld glossmeter with scanning capability, overcoming the disadvantages of conventional glossmeters, in the accurate determination of skin gloss and gloss profile for different skin types under different measurement conditions. Different parts of the body (back of the hands, the inner part of the arm and the forehead) of four volunteers with light, dark and intermediate skin types were scanned (also in different directions) to obtain the skin gloss profile and the statistical average skin gloss. Additionally, the skin surface was modified by arm extension and scanned as well. Our preliminary results showed that the statistical average skin gloss reading increased with the increasing lightness of skin. Areas with higher sebaceous glands (forehead) showed higher gloss reading than the other body parts (inner arm and back of the hand). However, the roughness of the skin surface decreased the statistical average skin gloss reading. The handheld scanning skin glossmeter allows for the accurate determination of skin gloss with sensitivity to small variation in the skin surface roughness with high repeatability.

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“…The motivation behind this paper is to study the use of two different glossmeters, which are based on the use of diffractive optical element (DOE) for the detection of surface quality of authentic and counterfeit tablets (theory, technical details and industrial applications of the DOE-based glossmeters are presented in [11][12][13]). For this purpose, we have studied the surface properties of commercially available antimalarial tablets.…”

Section: Introductionmentioning

confidence: 99%

Gloss measurement in detection of surface quality of pharmaceutical tablets: a case study of screening of genuine and counterfeit antimalaria tablets

Bawuah

Pääkkönen

Peiponen

2017

J. Eur. Opt. Soc.-Rapid Publ.

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Background: The surface quality of pharmaceutical tablets plays an important role, especially in the drug release of a tablet and hence affects the bioavailability of the drug. Furthermore, important tablet's properties such as coating uniformity and mechanical integrity that can be predicted based on the known surface properties manifest the inevitable link between a tablet's surface property (e.g. Gloss, average surface roughness) and its efficacy. Methods: In this article, laboratory based and handheld glossmeters as well as an optical profilometer were utilized for the detection of the surface properties of commercially available pharmaceutical tablets. Results: As a case study, we measured the surface properties of authentic and counterfeit antimalarial tablets. Clear differences between authentic and fake tablets were detected based on the measured average surface roughness and gloss values of the tablet samples. Conclusions: It is worth mentioning that this is the first time we have utilized both glossmeters for the purpose of surface quality investigation of real pharmaceutical tablets. It is therefore suggested that the handheld glossmeter is a useful device for quick inspection of tablet's surface quality both in the production environments as well as for field screening of fake tablets.

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Advanced glossmeters for industrial applications

Cited by 7 publications

References 5 publications

A prototype of an optical sensor for the identification of diesel oil adulterated by kerosene

A prototype of an optical sensor for the identification of diesel oil adulterated by kerosene

Scanning of skin gloss by a diffractive optical element-based handheld glossmeter

Gloss measurement in detection of surface quality of pharmaceutical tablets: a case study of screening of genuine and counterfeit antimalaria tablets

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