Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. Experimental configuration. (a), Setup. LD, laser diode; BS, beam splitter; F, color filter; PZT-M, piezo-transducer mirror; CCD, charge coupled device; CMOS, complementary metal oxide semiconductor; PC, personal computer; EB, electric balance. (b), Picture of the paint applied on the copper (Cu) plate. Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE

Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. Variation of images obtained for the paint #1 at different time lapses. (a), Reconstructed intensity image I(X,Y;t). (b), Phase difference image Δ ϕ (X,Y;t). (c), Microscopic images with magnification of 700. White rectangle (Area1) in (a) and (b) indicates the area observed with the microscope, and the dotted square (Area2) in (b) was analyzed for a local variation. Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE

Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. Comparison between microscopic observation and holographic analysis. (a), Peak value Cpm of cross-correlation function for two subsequent microscope images and the standard deviation σAreal of phase difference within Area1 obtained by holography. (b), Polynomial fitting curve for σAreal and a gradient ασAreal of the fitting curve. Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE

Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. Time dependence of C (a) and σ (b) calculated from the reconstructed complex amplitudes of the whole painted area and weight of paint Mp. σArea2 is obtained from Area2 in Fig. 2(b). Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE

Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. Fitting curves for the standard deviations σ and σArea2 obtained, respectively, from the whole painted area and Area2 in the period of 200 to 2500 s in Fig. 4(b) and their gradients ασ calculated from the curves. Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE

Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. Variation of weight of the paint Mp and a fitting curve for Mp and the gradient αMp of the fitting curve. Weight of paint #1 is measured with the electric balance with a resolution of 0.1 mg. Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE

Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. Variation of phase difference images Δ ϕ (X,Y;t) obtained for paint #2 at different time lapses. Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE

Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. (a), Time dependence of a standard deviation of the phase difference σ calculated from the reconstructed complex amplitudes and weight of paint #2 Mp. (b), Time dependence of a fitting curve to the values of σ and its gradient ασ obtained for paint #2. Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE

Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. Variation of weight of paint #2. (a), Weight Mp and weight loss ΔMp. (b), A fitting curve to Mp and a gradient of the fitting curve αMp. Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE

Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. Variation of phase-unwrapped images in Fig. 7 at different time lapses. Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE

Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. Cross-sectional variation of phase change along each dotted line in Fig. 10. (a) and (c) are along X1 and X2, respectively, (b) and (d) are along Y1 and Y2, respectively. Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE

Date of download: 6/27/2016 Copyright © 2016 SPIE. All rights reserved. Time dependence of a volume reduction in the paint film obtained from the value of phase change Δ ϕ in Fig. 10 and the specific gravity de of evaporated solvent estimated using the values of both Δv and Mp in Fig. 9. Figure Legend: From: Combination method of digital holography and gravimetric measurement for assessment of a paint drying process Opt. Eng. 2013;52(1): doi: /1.OE