Opto-thermal laser detonator

Patent metadata

Field	Value
Publication number	US-11629939-B2
Application number	US-202117460717-A
Country	US
Kind code	B2
Filing date	Aug 30, 2021
Priority date	Jan 29, 2018
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

An opto-thermal laser detonator uses resonantly absorptive tuned nano-material associated with secondary explosives for optical absorption and initiation by an integral laser diode. The opto-thermal laser detonator includes main explosive material; resonantly absorptive tuned nano-material; secondary explosive material, wherein the resonantly absorptive tuned nano-material and the secondary explosive material are associated to form associated material made of the resonantly absorptive tuned nano-material and the secondary explosive material; and a laser diode operatively connected to the associated material, wherein the laser diode initiates the associated material which in turn initiates the main explosive material.

First claim

The invention claimed is:

1. An opto-thermal laser detonation method, comprising the steps of:
providing main explosive material;
providing resonantly absorptive tuned nano-material;
providing secondary explosive material;
associating said resonantly absorptive tuned nano-material with said secondary explosive material providing associated material made of said resonantly absorptive tuned nano-material and said secondary explosive material;
positioning said associated material in said main explosive material;
providing an output pellet;
providing a laser diode that produces laser radiation;
locating said laser diode in said explosive material and in said associated material, positioning said lens to receive said laser radiation and project said laser radiation to said associated material,
positioning said output pellet proximate said associated material; and
initiating said main explosive material using said laser diode and said lens and said associated material and said output pellet.

2. The opto-thermal laser detonation method of claim 1 wherein said step of providing resonantly absorptive tuned nano-material comprises providing optically resonant nanometer sized dielectric spheres overcoated with a metal gold shell.

3. The opto-thermal laser detonation method of claim 1 wherein said step of providing resonantly absorptive tuned nano-material comprises providing optically resonant nanometer sized dielectric spheres overcoated with a metal gold shell.

4. The opto-thermal laser detonation method of claim 1 wherein said step of providing secondary explosive material comprises providing KETO RDX (K-6), Hexogen, RDX, PentaErythritol TetraNitrate (PETN), CL-20, or RS1-007 secondary explosive material.

Assignees

• L Livermore Nat Security Llc

Inventors

• Wilkins Paul R

Classifications

• F42B3/113 Primary

  activated by optical means, e.g. laser, flashlight · CPC title

• F42B3/11

  characterised by the material used, e.g. for initiator case or electric leads (F42B3/107 takes precedence) · CPC title