The United States of America as Represented by the Secretary of the Army
대리인 / 주소
Goldfine, Henry S.
인용정보
피인용 횟수 :
1인용 특허 :
2
초록▼
A method of manufacturing a low observable photoluminescent tracer projectile, for use with a small caliber weapon at night—which method utilizes a base phosphor material of Ca, Sr and S, or a base phosphor material of Y2, O2, and S—with a combination of minor dopant ingredients; which base phosphor
A method of manufacturing a low observable photoluminescent tracer projectile, for use with a small caliber weapon at night—which method utilizes a base phosphor material of Ca, Sr and S, or a base phosphor material of Y2, O2, and S—with a combination of minor dopant ingredients; which base phosphor material is mixed with a clear binder to form a photoluminescent material which is applied to the rear end, or base, of a small arms projectile as a thin layer; to which thin layer is added a layer of small retro-reflectors—whereby, when this projectile is fired from the weapon, the photoluminescent mixture will be activated and will be observable, using night vision at an angle of 0 to about 20 degrees from the rear end of the projectile.
대표청구항▼
1. A method of manufacturing a low observable photoluminescent tracer projectile, for use with a small caliber weapon, comprising: a. selecting a at least one photoluminescent phosphor material from the group consisting of 0 to 50 wt. % Ca, and 0 to 50 wt. % Sr; and at least 50 wt. % S, with of at l
1. A method of manufacturing a low observable photoluminescent tracer projectile, for use with a small caliber weapon, comprising: a. selecting a at least one photoluminescent phosphor material from the group consisting of 0 to 50 wt. % Ca, and 0 to 50 wt. % Sr; and at least 50 wt. % S, with of at least one minor dopant ingredients selected from the group consisting of Eu, Sm, Dy, Ce, Mn, Cu, Al, and Tm;b. compounding the selected phosphor material with 40 to 70 weight percent of a clear hinder to form a photoluminescent mixture;c. applying a thin layer of said photoluminescent mixture to the flat rear end of a small arms projectile;d. applying a plurality of retro-reflectors to the surface of the thin layer of said photoluminescent mixture. 2. The method of claim 1, wherein, in combination with the photoluminescent phosphor material, the selectable minor dopant ingredients are 0.01-1 wt. percent Eu, 0.01-1 wt. percent Sm, 0-1 wt. percent Dy, 0.01-1 wt. percent Ce, 0-1 wt. percent Mn, 0-1 wt. percent Cu, 0.01-1 wt. percent Al, and 0.01-1 wt. percent Tm. 3. The method of claim 1, where said clear binder is a 2-part epoxy. 4. The method of claim 1, wherein said retro-reflectors are selected from the group consisting of glass beads, cat's eyes, and corner cube retro-reflectors. 5. The method of claim 1, wherein said thin layer of said photoluminescent mixture is selected from the group consisting of a domed shaped and flat shaped configuration. 6. The method of claim 1, wherein the reacting propellant is selected from the group consisting of SMP-842, WC-844, WC-846, WC-860, HPC-33 and WPR-289. 7. The method of claim 1, wherein the photoluminescent phosphor material is a combination of Ca/Sr/S and wherein the photoluminescence persists for a luminescence time from 2 to 3 seconds. 8. The method of claim 1, wherein the reacting propellant primarily emit energy in the range of from 600 to 2,000 nm. 9. A method of manufacturing a low observable photoluminescent tracer projectile, for use with a small caliber weapon, comprising: a. mixing 20 wt. % to 49 wt. % Y2, 25 wt. % O2, and 25 wt. % S, with at least one minor dopant selected from the group consisting of Yb, Er, Ho and Tm;b. compounding the selected phosphor material with 40 to 70 wt. % of a clear binder to form a photoluminescent mixture;c. applying a thin layer of said photoluminescent mixture to the flat rear end of a small arms projectile;d. applying a plurality of retro-reflectors to the surface of the thin layer of said photoluminescent mixture. 10. The method of claim 9, wherein, the minor dopant are 1-20 wt. percent Yb, 0-6 wt. percent Er, 0-6 wt. percent Ho, and 0.01-6 wt. percent Tm.
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