Measurement of temperature and temperature profile of candle flame using holo-shear lens and Fourier fringe analysis technique

Abstract

Holo-shear lens made on dichromated gelatin (DCG) is used as a lateral shear interferometer for measurement of temperature and temperature profile of an axi-symmetric gaseous flame. By using a Fourier fringe analysis technique, high-frequency speckle noise can be filtered out and disturbances of a nonspectral component may also be compensated for. The method is simple and easy to implement. Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 08/19/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Optical Engineering 084105-3 August 2015 • Vol. 54(8) Kumar and Shakher: Measurement of temperature and temperature profile of candle flame using holo-shear. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 08/19/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Optical Engineering 084105-4 August 2015 • Vol. 54(8) Kumar and Shakher: Measurement of temperature and temperature profile of candle flame using holo-shear. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 08/19/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Optical Engineering 084105-5 August 2015 • Vol. 54(8) Kumar and Shakher: Measurement of temperature and temperature profile of candle flame using holo-shear. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 08/19/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Optical Engineering 084105-6 August 2015 • Vol. 54(8) Kumar and Shakher: Measurement of temperature and temperature profile of candle flame using holo-shear. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 08/19/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Optical Engineering 084105-7 August 2015 • Vol. 54(8) Kumar and Shakher: Measurement of temperature and temperature profile of candle flame using holo-shear. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 08/19/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx

Superior energy‐power performance of N‐doped carbon nano‐onions‐based asymmetric and symmetric supercapacitor devices

“…Under the controlled conditions, the pyrrole liquid was burnt in the air and the flame creates a temperature profile of 900°C to 1100°C naturally, to produce the final product 27 . It is well known that a flame generally produces a temperature profile automatically, the range of which depends on the fuel being used 28 . In our case, the flame generated by the burning of Pyrrole (the fuel) depicted a temperature profile around 900°C to 1000°C.…”

“…27 It is well known that a flame generally produces a temperature profile automatically, the range of which depends on the fuel being used. 28 In our case, the flame generated by the burning of Pyrrole (the fuel) depicted a temperature profile around 900 C to 1000 C. Pyrrole was used as a source of dopant N and C, in this experiment. As shown in Figure 1, the product was placed over the conical flask, which contains water circulation for cooling and constant temperature maintenance.…”

Holographic Interferometer for the Study of Phase Media, Which Has Four Output Channels of Different Sensitivity

“…The second term in (26) is the sum of the images of the original and modified objects. This term represents the holographic interference pattern.…”

“…However, the measurement methods proposed in these works are based on the methods of holographic interferometry with a single output channel, which limits their ability to measure in complex phase media, with a continuously changing pattern of temperature distribution. In work [26], in which, to obtain information on the temperature distribution of the flame of a candle, a shear holographic lens is used, four almost identical interferograms are obtained at the output, which is associated with the features of the optical scheme. For information on the distribution of the temperature field of a candle flame, the authors use one of them.…”

Applications of Digital Holographic Interferometry in Heat Transfer Measurements from Heated Industrial Objects

“…Furthermore, several optical interferometric methods such as classical interferometry [5,6,35,36], holographic interferometry [22][23][24]37], moiré deflectometry [38], speckle shearing interferometry [39], shearing interferometry [40,41], Talbot interferometry (TI) [42,43], Lau phase interferometry (LPI) [44], digital speckle pattern interferometry (DSPI) [45], holo-shear lens based lateral shear interferometry [46][47][48], and DHI [49][50][51][52][53][54][55][56][57][58] have been investigated to measure the temperature field inside the axi-symmetric gaseous flames and transparent hot objects. TI, Moiré deflectometry, lateral shear interferometry, and holo-shear lens-based interferometry are common path interferometric methods and hence these methods are relatively less sensitive to vibrations or external perturbations as compared to speckle shearing interferometry, HI, and DHI.…”