High-resolution topograms of fingerprints using multiwavelength digital holography

Ujitha Abeywickrema; Partha Banerjee; Akash Kota; Stephen E. Swiontek; Akhlesh Lakhtakia

doi:10.1117/1.OE.56.3.034117

28 March 2017 High-resolution topograms of fingerprints using multiwavelength digital holography

Ujitha Abeywickrema, Partha Banerjee, Akash Kota, Stephen E. Swiontek, Akhlesh Lakhtakia

Author Affiliations +

Optical Engineering, Vol. 56, Issue 3, 034117 (March 2017). https://doi.org/10.1117/1.OE.56.3.034117

Abstract

Fingerprint analysis is a popular identification technique due to the uniqueness of fingerprints and the convenience of recording them. The quality of a latent fingerprint on a surface can depend on various conditions, such as the time of the day, temperature, and the composition of sweat. We first developed latent fingerprints on transparent and blackened glass slides by depositing 1000-nm-thick columnar thin films (CTFs) of chalcogenide glass of nominal composition Ge28Sb12Se60. Then, we used transmission-/reflection-mode multiwavelength digital holography to construct the topograms of CTF-developed fingerprints on transparent/blackened glass slides. The two wavelengths chosen were 514.5 and 457.9 nm, yielding a synthetic wavelength of 4.1624 μm, which is sufficient to resolve pores of depths 1 to 2 μm. Thus, our method can be used to measure the level-3 details that are usually difficult to observe with most other techniques applied to latent fingerprints.

Citation Download Citation

Ujitha Abeywickrema, Partha Banerjee, Akash Kota, Stephen E. Swiontek, and Akhlesh Lakhtakia "High-resolution topograms of fingerprints using multiwavelength digital holography," Optical Engineering 56(3), 034117 (28 March 2017). https://doi.org/10.1117/1.OE.56.3.034117

Received: 28 December 2016; Accepted: 13 March 2017; Published: 28 March 2017

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