Journal
OPTICS EXPRESS
Volume 21, Issue 21, Pages 25285-25290Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.025285
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Funding
- Japan Society for the Promotion of Science (JSPS) KAKENHI [25330125]
- KAKENHI [25240015]
- Grants-in-Aid for Scientific Research [25330125] Funding Source: KAKEN
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Projectors require a zoom function. This function is generally realized using a zoom lens module composed of many lenses and mechanical parts; however, using a zoom lens module increases the system size and cost, and requires manual operation of the module. Holographic projection is an attractive technique because it inherently requires no lenses, reconstructs images with high contrast and reconstructs color images with one spatial light modulator. In this paper, we demonstrate a lensless zoomable holographic projection. Without using a zoom lens module, this holographic projection realizes the zoom function using a numerical method, called scaled Fresnel diffraction which can calculate diffraction at different sampling rates on a projected image and hologram. (C) 2013 Optical Society of America
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