Patent ID: 8530862

Claim:
A device comprising: an optically stimulated luminescence (OSL) sensor comprising: a first cylindrical cup-shaped filter having: a first circular base, a first cylindrical wall extending from the first circular base, and a first recess surrounded by the first circular base and the first cylindrical wall; and an optically stimulated luminescent material (OSLM) mounted in the first recess of the first cylindrical cup-shaped filter, wherein the first cylindrical cup-shaped filter comprises a first energy compensating material, wherein the OSL sensor comprises one or more filter material discs located between the OSLM and the circular base of the first cylindrical cup-shaped filter, wherein the OSL sensor comprises a converter material disc located between the OSLM and the first cylindrical cup-shaped filter, wherein the converter material disc comprises high-density polyethylene and wherein there is a conformal disc comprising polyethylene located between the OSLM and the converter material disc.