Contouring of Diffused Objects by Using Lensless Fourier Transform Digital Holography and Dual‐Index Immersion Method |
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| Authors: | G Sheoran M Hossain D S Mehta C Shakher |
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| Affiliation: | Laser Applications and Holography Laboratory, Instrument Design Development Center, Indian Institute of Technology, Delhi, New Delhi 110016, India |
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| Abstract: | Abstract: A simple method for contouring of diffused objects by using lensless Fourier transform digital holography and dual‐index immersion method is presented. It is noticed that to get more accurate results speckle noise should be eliminated/reduced from the reconstructed phase map from digital holograms. Speckle noise is handled by 5 × 5 median filtering. Depth contour interval up to a maximum of 0.12 mm could be achieved without making the interference phase fringes overcrowded. |
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| Keywords: | contouring dual‐index immersion method interference phase lensless Fourier transform digital holography speckle noise |
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