Manni Jeffrey G, Goodman Joseph W
JGM Associates, Inc., 15 New England Executive Park, Burlington, Massachusetts 01803, USA.
Opt Express. 2012 May 7;20(10):11288-315. doi: 10.1364/OE.20.011288.
We propose a method based on quantitative theoretical analysis for achieving speckle contrast of 1% or less in images created by a full-frame laser projection display system. The method employs a stationary multimode optical fiber to achieve the effect of using a rapidly moving diffuser, but without moving the fiber or any other system component. When a suitably large projector lens is used, low-speckle illumination light delivered through the fiber acts in conjunction with wavelength diversity at the projection screen to achieve speckle contrast of 1% in viewed images. We describe in detail how the proposed method might be used with most types of high-power visible lasers being considered for large-venue displays. When used with visible laser diodes, the method may also be suitable for use in laser-based television.
我们提出了一种基于定量理论分析的方法，用于在全帧激光投影显示系统生成的图像中实现1%或更低的散斑对比度。该方法采用一根固定的多模光纤来实现使用快速移动漫射器的效果，但无需移动光纤或任何其他系统组件。当使用适当大的投影镜头时，通过光纤传输的低散斑照明光与投影屏幕处的波长多样性共同作用，以在观看的图像中实现1%的散斑对比度。我们详细描述了所提出的方法如何与大多数正在考虑用于大型场馆显示的高功率可见激光器一起使用。当与可见激光二极管一起使用时，该方法也可能适用于基于激光的电视。
