Grin type diffuser based on volume holographic material
Patent 5365354 Issued on November 15, 1994. Estimated Expiration Date: 
March 9, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 9, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3754814 Speckle minimization in projection displays by reducing spatial coherence of the image light Holographic diffusion screen and methods for the production thereof Chromatically corrected directional diffusing screen Patent #: 5046793 InventorsAssigneeApplicationNo. 848703 filed on 03/09/1992US Classes:359/15, Using a hologram as an optical element359/22, For producing or reconstructing images from multiple holograms (e.g., color, etc.)359/28, Having multiple object beam or diffuse object illumination359/599DIFFUSING OF INCIDENT LIGHTExaminersPrimary: Lerner, MartinAttorney, Agent or FirmInternational ClassesG02B 005/32G02B 005/02 G02B 027/48 G03H 001/32 AbstractA diffuser based on a phase volume holographic medium is recorded non-holographically with speckle which define non-discontinuous and smoothly varying change in the refractive index of the medium. The diffuser scatters light traveling from an entrance surface to an exit surfaces and reflection from the diffuser is substantially limited to Fresnel reflection from the entrance and exit surfaces and light exiting the exit surface is substantially non-specular. | |
