# US 8,785,887 B1 · Power system for dosimeter reader > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,785,887 B1 - Document ID: US8785887B1 - Status: Granted - Kind: B1 - Application number: 14/012,072 - Filed: 2013-08-28 - Published: 2014-07-03 - Granted: 2014-07-22 - Earliest claimed: 2010-04-09 - Assignees: Landauer, Inc. - Applicants: Landauer, Inc. - Inventors: R. Craig Yoder; Mark S. Akselrod; Kent J. Dillin; Vasiliy V. Fomenko; David F. Johnson; Yoshikazu Tatsumi; Tse-Min Lo - Web page: https://patentgrep.com/patent/US8785887B1 ## CPC - G01T 1/105: Read-out devices (G01T1/115 takes precedence) - G01T 1/10: Luminescent dosimeters - G01T 1/115: Read-out devices - G01T: MEASUREMENT OF NUCLEAR OR X-RADIATION (radiation analysis of materials, mass spectrometry G01N23/00; tubes for determining the presence, intensity, density or energy of radiation or particles H01J47/00) ## Abstract Described is a portable dosimeter reader that is small in size and light in weight. ## Claims ### Claim 1 A device comprising: an optically stimulated luminescence (OSL) reader for reading one or more OSL sensors of a dosimeter sled; a sled slider that is driven by an engine to position in turn each of the one or more OSL sensors of the dosimeter sled at a reading position where the OSL reader reads each respective OSL sensor; a display for displaying information relating to reading the one or more OSL sensors; and a battery compartment for retaining one or more batteries, wherein the OSL reader includes an LED light source, wherein the battery compartment is electrically connected to the OSL reader, the engine and the display, and wherein the one or more batteries provide all of the power required for operating the OSL reader, the engine and the display, wherein each of the one or more OSL sensors comprises: an optically stimulated luminescent material (OSLM) mounted in one or more cylindrical cup-shaped energy compensating filters; one or more discs of filter material sandwiched between a filtered side of the OSLM and a selected cylindrical cup-shaped energy compensating filter of the one or more cylindrical cup-shaped energy compensating filters. ### Claim 2 (depends on 1) The device of claim 1, further comprising the one or more batteries. ### Claim 3 (depends on 2) The device of claim 2, wherein the one or more batteries comprise four AA batteries. ### Claim 4 (depends on 2) The device of claim 2, wherein the total weight of the one or more batteries is less than about 100 g. ### Claim 5 (depends on 2) The device of claim 2, wherein the total weight of device including the one or more batteries is about 2,700 g or less. ### Claim 6 (depends on 1) The device of claim 1, wherein the one or more batteries comprise four AA batteries. ### Claim 7 (depends on 1) The device of claim 1, wherein the total weight of the device excluding the one or more batteries is 2,600 g or less. ### Claim 8 (depends on 1) The device of claim 1, wherein the OSLM comprises an Al2O3:C material. ### Claim 9 (depends on 1) The device of claim 1, wherein the device requires a current of 90 mA for less than 1 second to read each of the one or more OSL sensors. ### Claim 10 (depends on 1) The device of claim 1, wherein the device requires a current of 80 mA or less when in a powered idle state prior to reading the one or more OSL sensors. ### Claim 11 (depends on 1) The device of claim 1, wherein the device is mounted in a clamshell case. ### Claim 12 (depends on 1) The device of claim 1, wherein the device includes a handle for carrying the device in one hand. ### Claim 13 A device comprising: an optically stimulated luminescence (OSL) reader for reading one or more OSL sensors of a dosimeter sled; a sled slider that is driven by an engine to position in turn each of the one or more OSL sensors of the dosimeter sled at a reading position where the OSL reader reads each respective OSL sensor; a display for displaying information relating to reading the one or more OSL sensors; a battery compartment for one or more batteries; and a case enclosing the device, wherein when the case is in a closed configuration, the device has a total volume of about 3,065 cm3 or less, wherein each of the one or more OSL sensors comprises: an optically stimulated luminescent material (OSLM) mounted in one or more cylindrical cup-shaped energy compensating filters; one or more discs of filter material sandwiched between a filtered side of the OSLM and a selected cylindrical cup-shaped energy compensating filter of the one or more cylindrical cup-shaped energy compensating filters. ### Claim 14 (depends on 13) The device of claim 13, wherein the device includes a handle for carrying the device in one hand. ### Claim 15 A device comprising: a radiation dosimeter including one or more optically stimulated luminescence (OSL) sensors; and a strap member for wrapping around a portion of a body or a portion of an article of clothing to thereby allow the dosimeter to be worn by an individual, wherein the dosimeter includes an upper housing and a lower housing, wherein the upper housing is separable from the lower housing, wherein the one or more of the OSL sensors each comprise an optically stimulated luminescent material (OSLM) and one or more filters, wherein the upper housing includes interior screw threads that engage exterior screw threads on the lower housing, and wherein is separable from the lower housing when the upper housing is turned 90° relative to the lower housing from a position in which the lower housing is mounted in the upper housing, wherein the dosimeter includes two loops on opposite sides of the dosimeter through which the strap member is threaded and which are graspable by an individual to thereby allow the individual to turn the upper housing 90° relative to the lower housing when the lower housing is prevented from rotating, wherein the lower housing comprises one or more rotation preventing engagement structures for engaging respective one or more complementary rotation preventing engagement structures of a dosimeter reader to prevent rotation of the lower housing when the lower housing is loaded in the dosimeter reader, and wherein the lower housing comprises one or more retaining structures for engaging respective one or more complementary retaining structures of the dosimeter reader to retain the lower housing that is loaded in the dosimeter reader from lifting up from the dosimeter reader when the upper housing of the dosimeter reader is lifted up from the lower housing. ### Claim 16 A device comprising: a radiation dosimeter comprising: a dosimeter sled including one or more optically stimulated luminescence (OSL) sensors; an upper housing; and a lower housing; and a clip for attachment to a portion of an article of clothing to thereby allow the dosimeter to be worn by an individual, wherein the one or more of the OSL sensors each comprise an optically stimulated luminescent material (OSLM) and one or more filters, wherein the upper housing includes interior screw threads that engage exterior screw threads on the lower housing, wherein the upper housing is separable from the lower housing when the upper housing is turned 90° relative to the lower housing from a position in which the lower housing is mounted in the upper housing, wherein the dosimeter sled is slidably mounted in the lower housing, wherein the lower housing comprises one or more rotation preventing engagement structures for engaging respective one or more complementary rotation preventing engagement structures of a dosimeter reader to prevent rotation of the lower housing when the lower housing is loaded in the dosimeter reader, and wherein the lower housing comprises one or more retaining structures for engaging respective one or more complementary retaining structures of the dosimeter reader to retain the lower housing that is loaded in the dosimeter reader from lifting up from the dosimeter reader when the upper housing of the dosimeter reader is lifted up from the lower housing, wherein the dosimeter includes two loops on opposite sides of the dosimeter which are graspable by an individual to thereby allow the individual to turn the upper housing 90° relative to the lower housing when the lower housing is prevented from rotating and wherein the clip is attached to one of the two loops. ### Claim 17 A device comprising: a radiation dosimeter including one or more optically stimulated luminescence (OSL) sensors; and a clip for attachment to a portion of an article of clothing to thereby allow the dosimeter to be worn by an individual, wherein the one or more of the OSL sensors each comprise an optically stimulated luminescent material (OSLM) and one or more filters, wherein the dosimeter includes an upper housing and a lower housing and wherein the upper housing is separable from the lower housing, wherein the upper housing includes interior screw threads that engage exterior screw threads on the lower housing, and wherein the upper housing is separable from the lower housing when the upper housing is turned 90° relative to the lower housing from a position in which the lower housing is mounted in the upper housing, wherein the dosimeter includes two loops on opposite sides of the dosimeter which are graspable by an individual to thereby allow the individual to turn the upper housing 90° relative to the lower housing when the lower housing is prevented from rotating and wherein the clip is attached to one of the two loops, wherein the lower housing comprises one or more rotation preventing engagement structures for engaging respective one or more complementary rotation preventing engagement structures of a dosimeter reader to prevent rotation of the lower housing when the lower housing is loaded in the dosimeter reader, and wherein the lower housing comprises one or more retaining structures for engaging respective one or more complementary retaining structures of the dosimeter reader to retain the lower housing that is loaded in the dosimeter reader from lifting up from the dosimeter reader when the upper housing of the dosimeter reader is lifted up from the lower housing.