Semi-transparent detector array for UV/near-UV detection

Patent metadata

Field	Value
Publication number	US-12125658-B2
Application number	US-202117514884-A
Country	US
Kind code	B2
Filing date	Oct 29, 2021
Priority date	Oct 29, 2021
Publication date	Oct 22, 2024
Grant date	Oct 22, 2024

Abstract

An apparatus and method are provided for a night vision system that integrates functions of detecting an intensified image and transmitting the intensified image superimposed with a heads-up display. The night vision system includes an optical device having a transparent display configured with pixels emitting display light (i.e., the heads-up display), and the transparent display has transmission regions arranged among the pixels for transmitting light representing an intensified image (e.g., luminescent light from a phosphor screen). Light rays passing through the transmission regions also pass through detectors, which detect light outside of the visible spectrum (e.g., UV light). By detecting light outside of the visible spectrum, the detectors detect the intensified image without degrading the image in the visible spectrum that is provided to users.

First claim

What is claimed is:

1. An optical device comprising:
a stacked device formed in a single semiconductor chip, the stacked device comprising:
a plurality of electro-optical circuits formed on the semiconductor chip, and one or more transmission regions being arranged among respective electro-optical circuits of the plurality of electro-optical circuits, the transmission regions being at least partially transparent to light within a first range of wavelengths; and
one or more detectors configured to be in a pathway of rays of light directed through the one or more transmission regions, the one or more detectors detecting light within a second range of wavelengths and transmitting the light within the first range of wavelengths.

2. The optical device of claim 1 , wherein the plurality of electro-optical circuits comprises a plurality of light emitters.

3. The optical device of claim 2 , wherein the plurality of light emitters is driven by a plurality of transistors.

4. The optical device of claim 3 , wherein the one or more detectors are in a same layer as the plurality of transistors.

5. The optical device of claim 1 , wherein the plurality of electro-optical circuits comprises individual pixels of a display.

6. The optical device of claim 1 , wherein the light within the second range of wavelength is ultraviolet light and the light within the second range of wavelengths is visible light.

7. The optical device of claim 1 , wherein the one or more detectors are detectors selected from the group consisting of light emitting diodes, organic light emitting diodes, thinned silicon photodiodes, thinned narrow-bandgap photodiodes, or a large-bandgap photodiodes.

8. The optical device of claim 1 , wherein the one or more detectors are arranged in regions between the plurality of electro-optical circuits and, when viewed from above a plane of the stacked device, the one or more detectors are spaced from the plurality of electro-optical circuits.

9. The optical device of claim 1 , wherein, when viewed from above a plane of the stacked device, the one or more detectors overlap a part of the plurality of electro-optical circuits.

Assignees

• L3Harris Technologies Inc

Inventors

• Burnsed Jon D
• Becker Jacob J

Classifications

• G02B2027/0138

  comprising image capture systems, e.g. camera · CPC title

• G02B23/12 Primary

  with means for image conversion or intensification · CPC title

• H01J31/12

  with luminescent screen · CPC title

• G02B13/16

  for use in conjunction with image converters or intensifiers {, or for use with projectors, e.g. objectives for projection TV} · CPC title

• G01J3/4406

  Fluorescence spectrometry · CPC title