A single-shot three-dimensional (3D) shape measurement by low-coherent optical path difference digital holography with small energy consumption is proposed. The use of a superluminescent diode makes it possible. Weighting of the single hologram and numerical reconstruction give the 3D shape of an object. Experimental results using a simple object (the surface of a button cell battery) are given. By comparison with experimental results using a vertical scanning method, the proposed method is confirmed. The effects of a shift interval of the hologram and a zero-order component on a measurement result are also discussed.
Optical setup for low-coherent optical path difference digital holography, The measured shape of the button cell battery surface.
Reference
- Yuji Tanaka, Yutaka Mori, and Takanori Nomura, "Single-shot three-dimensional shape measurement by low-coherent optical path difference digital holography," Appl. Opt. 53, G19-G24 (2014).