Digital Micro-mirror Device (DMD) is an important tool in holographic display owning high-speed refresh rate and
good diffraction efficiency. However, the reconstruction light source has great impact to image quality. A new
holographic display system based on DMD for using light-emitting diodes (LEDs), is proposed in this paper. LEDs are
chosen as light source to replace the laser, since it can reduce the speckle noise effectively, which is caused by both
temporal and spatial coherence of laser. In order to solve the problem using LED as DMD holographic display light
source, the characteristics of DMD as the display device for holographic displays are studied. An aspheric collimator for
LED is used to improve the optical efficiency. A spatial filter is used to improve the coherence. The experimental results
show that this lighting system has a good display quality.
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Ping Su ; Bingchao Cheng ; Wenbo Cao ; Jianshe Ma and Liangcai Cao
A holographic display system based on DMD using LED as light source
", Proc. SPIE 9970, Optics and Photonics for Information Processing X, 99700B (September 14, 2016); doi:10.1117/12.2236761; http://dx.doi.org/10.1117/12.2236761