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US08294993B2 Variable reflectivity notch filter and optical devices using same 有权
可变反射陷波滤波器和使用其的光学器件

  • Patent Title: Variable reflectivity notch filter and optical devices using same
  • Patent Title (中): 可变反射陷波滤波器和使用其的光学器件
  • Application No.: US12843424
    Application Date: 2010-07-26
  • Publication No.: US08294993B2
    Publication Date: 2012-10-23
  • Inventor: Maarten Niesten
  • Applicant: Maarten Niesten
  • Applicant Address: US WA Remond
  • Assignee: Microvision, Inc.
  • Current Assignee: Microvision, Inc.
  • Current Assignee Address: US WA Remond
  • Agent Kevin D. Wills
  • Main IPC: G02B27/14
  • IPC: G02B27/14 ;  G02B5/28
Variable reflectivity notch filter and optical devices using same
Abstract:
A variable reflectivity notch filter (100), suitable for use with a laser image projection source (1001) is provided. The variable reflectivity notch filter (100) defines a transmission curve (101) having a plurality of reflective peaks (102,103,104) each centered about a predetermined wavelength (105,106,107), which can correspond to output wavelengths from laser sources. Reflective peaks (204) corresponding to wavelengths that change with temperature are configured with wider widths (223) and lesser reflectivities (210) than are other reflective peaks (202,203). To provide enhanced color balance, lasers (821) corresponding to these reflective peaks (204) can be driven at higher output power. Variable reflectivity notch filters (100) are suitable for use in head-up displays as well as other applications.
Abstract(Chinese):

提供了适用于激光图像投影源（1001）的可变反射率陷波滤波器（100）。 可变反射率陷波滤波器（100）限定了具有多个反射峰值（102,103,104）的传输曲线（101），每个反射峰值（102,103,104）以预定波长（105,106,107）为中心，其可对应于来自激光源的输出波长。 对应于随温度变化的波长的反射峰（204）被配置为比其它反射峰（202,203）更宽的宽度（223）和较小的反射率（210）。 为了提供增强的色彩平衡，可以以更高的输出功率驱动对应于这些反射峰值（204）的激光器（821）。 可变反射率陷波滤波器（100）适用于平视显示器以及其他应用。

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