Avionics data storage device and transfer system with electro-opto-mechanical identification
View Patent ↗An avionics data storage device and data transfer system are provided. The data storage device, has a slanted, “shark-like” door, which provides an environmental seal when not installed in the data transfer system. The storage device and data transfer system maintain environmental seals at all times other than installation. The storage device and transfer system can implement a variety of identification and authentication methods, including electrical, physical, and optical authentication or identification.
1. An optical authentication system, comprising:
a first portion of the optical authentication system disposed in an item to be authenticated, the first portion of the optical authentication system comprising a first volume of a first optical media having a first index of refraction, and first volume of a second optical media having a second index of refraction, and a first periodic interface between the first volume of the first optical media and the first volume of the second optical media, and a collimated light source;
and a second portion of the optical authentication system disposed in an authenticator, the second portion of the optical authentication system comprising a second volume of the first optical media, a second volume of the second optical media, a second periodic interface between the second volume of the first optical media and the second volume of the second optical media, and a photodetector; and
wherein the first portion of the optical authentication system and the second portion of the optical authentication system are configured to couple such that the first volume of the second optical media contacts the second volume of the second optical media;
wherein collimated light source is configured to direct collimated light through the periodic interface from the first volume of the first optical media to the first volume of the second optical media and through the second periodic interface from the second volume of the second optical media to the second volume of the first optical media to cause light to exit the second volume of the first optical media; and
wherein the second volume of the second optical media have a combined thickness such that the light that exits the second volume of the first optical media is collimated if the first interface and the second interface are copies.
2. The optical authentication system of claim 1 , wherein the first periodic interface comprises a plurality of copies of a diffusion structure.
3. The optical authentication system of claim 1 , wherein the first periodic interface comprises a plurality of copies of a predetermined sequence of shapes.
4. The optical authentication system of claim 1 , wherein the collimated light source comprises a diverging light-emitting device and a collimating lens.
5. The optical authentication system of claim 4 , wherein the collimating lens comprises a gradient index lens.
6. The optical authentication system of claim 1 , wherein the collimated light source comprises a diverging light-emitting device, a collimating lens, and a polarizer configured to produce a planar polarized light beam.
7. The optical authentication system of claim 6 , wherein the collimating lens comprises a gradient index lens.
8. The optical authentication system of claim 1 , wherein the collimated light source comprises a diverging light-emitting device, a collimating lens, a polarizer configured to produce a planar polarized light beam, and a pass band filter configured to produce a monochromatic light beam.
9. The optical authentication system of claim 8 , wherein the pass band filter comprises a dichroic filter.
10. The optical authentication system of claim 8 , wherein the collimating lens comprises a gradient index lens.
11. The optical authentication system of claim 1 , wherein the collimated light source comprises a collimated light-emitting device and a polarizer configured to produce a planar polarized light beam.
12. The optical authentication system of claim 1 , wherein the collimated light source comprises a collimated light-emitting device, a polarizer configured to produce a planar polarized light beam, and a pass band filter configured to produce a monochromatic light beam.
13. The optical authentication system of claim 12 , wherein the pass band filter comprises a dichroic filter.
14. The optical authentication system of claim 1 , further comprising a polarizer configured to produce a planar polarized light beam.
15. The optical authentication system of claim 1 , further comprising a pass band filter.
16. The optical authentication system of claim 15 , wherein the pass band filter comprises a dichroic filter.
17. The optical authentication system of claim 1 , further comprising a polarizer configured to produce a planar polarized light beam and a pass band filter.
18. The optical authentication system of claim 17 , wherein the pass band filter comprises a dichroic filter.
19. The optical authentication system of claim 1 , further comprising embedded elements sized significantly smaller than the wavelength of the collimated light source.
20. The optical authentication system of claim 19 , wherein the embedded elements are a plurality of hard nanoparticles.