HIGH EFFICIENCY BEAM COMBINER COATING

• US 20150213754A1
• Filed: 01/27/2015
• Published: 07/30/2015
• Est. Priority Date: 01/27/2014
• Status: Abandoned Application

• Current Assignee: eMagin Corporation (Samsung Electronics Co. Ltd.)
• Original Assignee: eMagin Corporation (Samsung Electronics Co. Ltd.)
• Inventors: Amjad, Malik I.
• Application Number:
  US14/606,977
• Publication Number:
  US 20150213754A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 23/12 with means for image conversion or intensification
• CPC Class Codes: G09G 2320/0238 Improving the black level
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 2340/10 Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]

Abstract

A system having an improved optical coating for use in beam combiner assemblies for an image fusion device using an organic light-emitting diode (OLED) display. The system combines multi-spectral images of a scene having superior reflection of the OLED display image while incorporating high transmission of the image fusion device while allowing low power requirements on the system.

Claims

1. A system for combining multi-spectral images of a scene, the system comprising:

a channel for transmitting a scene image in a first spectral band in a first optical path;

a separate second detector for sensing the scene in a second spectral band in a second optical path, the second detector having an image output representative of the scene;

a display for receiving the image output of the second detector, and displaying an image from the second spectral band, the display includes a transparent organic light-emitting diode (OLED); and

a beam mixer for combining the scene image in the first spectral band with the displayed image, and conveying the combined multi-spectral images to an output, wherein the mixer includes means for transmitting unattenuated the scene image in the first spectral band while simultaneously maximizing reflectance of light from the display.

2. The system of claim 1 wherein the reflectance of light averages over at least 50%.

3. The system of claim 1 wherein the means of the beam mixer is a high efficiency coating for transmitting unattenuated the scene image in the first spectral band while simultaneously maximizing reflectance of light from the display.

4. A beam combiner assembly for an image fusion device using an organic-light emitting diode (OLED) display, wherein the image fusion device emits spectral bands of light, and the OLED display emits a spectrum of visible light having spectral proprieties, comprising:

means configured to generate a combined image by combining a first image from a first imager and a second image from a second imager, said means further configured to transmit said combined image to said OLED display; and

means for minimizing overlap of wavelengths between the bands of light emitted from the image fusion device and the OLED display.

5. The assembly of claim 4, wherein the means for minimizing overlap of wavelengths between the bands of light emitted from the image fusion device and the OLED display is an optical coating.

6. The assembly of claim 5, wherein the optical coating includes means for optimizing reflectance response of the OLED display in the visible spectrum.

7. The assembly of claim 6, wherein the reflectance response of the OLED display is at least 50%.

8. The assembly of claim 5, wherein the OLED display has a spectral emission pattern with minimum emission at the same wavelength as maximum emission of the image fusion device.

9. An optical coating for use in bean combiner assemblies that use an organic-light emitting diode (OLED) display with which to fuse images derived from different spectral channels, comprising:

means for transmitting unattenuated a first image derived from a first spectral channel while simultaneously maximizing reflectance of light from the OLED display.

10. The coating of claim 9 wherein the reflectance of light from the OLED display is at least 50%.