File:330-PS-1004 (USN 708062) (18702050623).jpg
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Description330-PS-1004 (USN 708062) (18702050623).jpg | 330-PS-1004 (USN 708062): Navy’s Two Types of Radiation Detectors. Lieutenant Rosemary Lalferty is holding one of the two types of radiation “dog tags” developed by the U.S. Navy Research Laboratory under sponsorship of the Bureau of Ships, for the protection of its personnel. The oblong object on the table is the other type. Both types of “Dosimeters,” which measure the amount of radiation exposure the wearer has experienced, are simple, rugged and inexpensive. They keep their sensitivity in storage and under extreme heat. One type uses salt crystals known as Alkali Halides, which are normally transparent but turn blue when exposed to gamma rays. A U.S. Navy medic can compare the intensity of the shade of blue of the “dog tag” with a color chart and decide on the spot the degree of seriousness of the individual radiation casualty. Silver-activated phosphate glass is the sensitive element in the other type. Gamma Rays convert the glass into phosphor which takes on an orange color under ultraviolet light. The intensity of the color is the measure of the radiation dose. A quick measure can be made visually. Accurate measurement can be made with a simple and compact photoelectric “reader.” Photograph released January 15, 1950. (6/30/2015). |
Date | |
Source | 330-PS-1004 (USN 708062) |
Author | National Museum of the U.S. Navy |
Licensing edit
This image was originally posted to Flickr by Photograph Curator at https://flickr.com/photos/127906254@N06/18702050623 (archive). It was reviewed on 10 July 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark. |
10 July 2018
Public domainPublic domainfalsefalse |
This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:09, 10 July 2018 | 2,916 × 2,248 (2.33 MB) | Hiàn (alt) (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D80 |
Exposure time | 1/320 sec (0.003125) |
F-number | f/9 |
ISO speed rating | 1,600 |
Date and time of data generation | 10:26, 30 June 2015 |
Lens focal length | 18 mm |
Width | 3,872 px |
Height | 2,592 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS6 (Windows) |
File change date and time | 05:48, 1 July 2015 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 10:26, 30 June 2015 |
Meaning of each component |
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Image compression mode | 4 |
APEX shutter speed | 8.321928 |
APEX aperture | 6.33985 |
APEX exposure bias | 0 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 70 |
DateTimeOriginal subseconds | 70 |
DateTimeDigitized subseconds | 70 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 27 mm |
Scene capture type | Standard |
Scene control | High gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Serial number of camera | 3073408 |
Lens used | 12.0-24.0 mm f/4.0 |
Date metadata was last modified | 01:48, 1 July 2015 |
Unique ID of original document | F6CAF86380FEEE6932ABDF9A42414AC9 |