Storage of color films by means of a single-wavelength laser and SLMs

Songcan Lai; Bin Shan; Fuping Wang

doi:10.1117/12.251852

23 September 1996 Storage of color films by means of a single-wavelength laser and SLMs

Songcan Lai, Bin Shan, Fuping Wang

Proceedings Volume 2885, Holographic Optical Elements and Displays; (1996) https://doi.org/10.1117/12.251852
Event: Photonics China '96, 1996, Beijing, China

Abstract

In this paper, a new storage approach of color films by means of a single-wavelength laser and SLMs is presented. A color film is illuminated with a beam of incoherent white light but filtered into red one. Then a frame on the film is imaged on a CdS liquid crystal SLM. The red coherent light of a He-Ne laser projects on the SLM as a reading light. So the output light of the SLM is also a red coherent light that carries the image information of the red incoherent light. By replacing filters with green and blue ones, three images of red coherent light can be produced step by step. A rainbow holographic recording geometry is arranged to store the three coherent light waves. Therefore, an image frame of the color film is stored in a rainbow hologram which can be preserved forever.

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Songcan Lai, Bin Shan, and Fuping Wang "Storage of color films by means of a single-wavelength laser and SLMs", Proc. SPIE 2885, Holographic Optical Elements and Displays, (23 September 1996); https://doi.org/10.1117/12.251852

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KEYWORDS

Spatial light modulators

Holography

Holograms

Compact discs

Beam splitters

Helium neon lasers

Image filtering

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