Single-shot digital holographic microscopy with a modifiedlateral-shearing interferometer based on computational telecentricity
| Autor: | Byung-Mok Kim, Seong-Jin Park, Eun-Soo Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Computer science
business.industry Holography 02 engineering and technology 021001 nanoscience & nanotechnology Holographic interferometry 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Lens (optics) Interferometry Optical imaging Optics law 0103 physical sciences Focal length Digital holographic microscopy 0210 nano-technology Shearing interferometer business |
| Zdroj: | OPTICS EXPRESS(25): 6 |
| Popis: | Single-shot digital holographic microscopy (SS-DHM) with a modified lateral-shearing interferometer (MLSI) based on computational telecentricity is proposed. The proposed system is composed of three-step processes such as optical recording, digital compensation and numerical reconstruction processes. In the 1st step, the object beam is optically recorded with the MLSI, where a tube lens is set to be located at the slightly shorter distance than its focal length from the objective lens. Then, another phase factor due to the deviated locating of the tube lens from its focal length is additionally generated, which is called an additional quadratic phase factor (AQPF). However, in the 2nd step, this AQPF can be balanced out with the computer-generated version of the AQPF. In the 3rd step, the three-dimensional (3-D) object can be finally reconstructed from this AQPF-compensated hologram. Thus, by combined use of the optical recording and digital compensation processes of the AQPF, the proposed system can be made virtually operate in a so-called computational telecentricity, which enables us to implement a MLSI-based SS-DHM system. Wave-optical analysis and successful experiments with actual 3-D objects confirm the feasibility of the proposed system in the practical application fields. (C) 2017 Optical Society of America |
| Databáze: | OpenAIRE |
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