Power system for dosimeter reader

• US 8,785,887 B1
• Filed: 08/28/2013
• Issued: 07/22/2014
• Est. Priority Date: 04/09/2010
• Status: Active Grant

• Current Assignee: Landauer, Inc. (Fortive Corp.)
• Original Assignee: Landauer, Inc. (Fortive Corp.)
• Inventors: Yoder, R. Craig, Akselrod, Mark S., Dillin, Kent J., Fomenko, Vasiliy V., Johnson, David F., Tatsumi, Yoshikazu, Lo, Tse-Min
• Primary Examiner(s): Porta, David
• Assistant Examiner(s): FEIN, ABRA S
• Application Number:
  US14/012,072
• Publication Number:
  US 20140183378A1
• Time in Patent Office: 328 Days
• Field of Search: 250/484.2
• US Class Current: 250/484.2
• CPC Class Codes: G01T 1/10 Luminescent dosimeters
• CPC Class Codes: G01T 1/105 Read-out devices G01T1/115 takes precedence
• CPC Class Codes: G01T 1/115 Read-out devices

Abstract

Described is a portable dosimeter reader that is small in size and light in weight.

Claims

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.

2. The device of claim 1, further comprising the one or more batteries.

3. The device of claim 2, wherein the one or more batteries comprise four AA batteries.

4. The device of claim 2, wherein the total weight of the one or more batteries is less than about 100 g.

5. The device of claim 2, wherein the total weight of device including the one or more batteries is about 2,700 g or less.

6. The device of claim 1, wherein the one or more batteries comprise four AA batteries.

7. The device of claim 1, wherein the total weight of the device excluding the one or more batteries is 2,600 g or less.

8. The device of claim 1, wherein the OSLM comprises an Al₂O₃:

C material.

9. 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.

10. 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.

11. The device of claim 1, wherein the device is mounted in a clamshell case.

12. The device of claim 1, wherein the device includes a handle for carrying the device in one hand.

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.

14. The device of claim 13, wherein the device includes a handle for carrying the device in one hand.

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.

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.

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.