×

Hologram screen and a method of producing the same

  • US 6,597,477 B2
  • Filed: 03/26/2002
  • Issued: 07/22/2003
  • Est. Priority Date: 07/07/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A hologram screen for reproducing an image based on an output light obtained by scattering and diffusing and image light from an image projector, characterized in that;

  • said hologram screen present an optical spectrum whose bandwidth is 100 nm or more; and

    said hologram screen is comprised of a hologram element which is made by forming an interference fringe on a photosensitive material, said interference fringe being formed by irradiating an object light and a reference light onto said light sensitive material, said object light being made of a light diffused by a light diffusion body having a large diffusion angle and said reference light being made of a non-diffused light, where said light diffusion angle of the light diffusion body is set to 9 degrees or more such that the half bandwidth of said optical spectrum of the hologram screen is 100 nm or more.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×