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Wednesday, February 5, 2020 | History

2 edition of Standard procedure for testing infrared detectors and for describing their performance. found in the catalog.

Standard procedure for testing infrared detectors and for describing their performance.

United States Office of the Director of Defense Research and Engineering

Standard procedure for testing infrared detectors and for describing their performance.

Prepared by R. Clark Jones, Deryck Goodwin [and] George Pullan.

by United States Office of the Director of Defense Research and Engineering

  • 241 Want to read
  • 21 Currently reading

Published in Washington .
Written in English

    Subjects:
  • Infra-red rays

  • Edition Notes

    ContributionsJones, R, Clark
    Classifications
    LC ClassificationsQC457 U55
    The Physical Object
    Pagination45p.
    Number of Pages45
    ID Numbers
    Open LibraryOL16630162M

    Industry-standard image formats, such as the tagged image file format TIFFpermit files to work with a wide array of commercially available software packages. The liquid nitrogen had to be replenished every 1. Results for three key factors — sharpness, distortion, and noise — are described below. The factors affecting the performance of infrared tympanic thermometer were discussed by Heusch et al. The testing unit also is provided with a means for detecting the relay contact resistances in the unit to be tested for measuring the electrical resistance of the relay contacts in a simple yet effective manner.

    Introduction Body temperature is an indication to express the health condition or pathological state. Infrared radiation source 15 of testing unit 10 is also supplied from the rectified and filtered AC at point 37 and this DC voltage is further applied to variable voltage regulator 31 which might typically be an LM model variable voltage regulator. The method of claim 8 including the step of sensing the presence said infrared radiation. The relay contact resistance test circuit 16 is also supplied from the output 50 of voltage regulator 38 through switch Existing Conditions Prior to the commencement of any work, all existing conditions related to the safety of the work must be determined. The first type is the glass mercury thermometer.

    This yields very good contrast for MWIR imagers as seen in the image on the far right. If normally closed relay contact 13 has a resistance value which exceeds 3 ohms, light emitting diode 58 will extinquish and light emitting diodes 59 and 60 will remain lit. As an example, for energized equipment with moveable parts, you must be at least 10 feet from any energized component with a voltage between 50 - volts. Results for three key factors — sharpness, distortion, and noise — are described below. Imatest responded to requests from engineers at WSMR and VAFB for a system that could measure, analyze, and document infrared system performance in both lab and field operating environments.


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Standard procedure for testing infrared detectors and for describing their performance. by United States Office of the Director of Defense Research and Engineering Download PDF Ebook

Evaluation of Performance and Uncertainty of Infrared Tympanic Thermometers

Industry-standard image formats, such as the tagged image file format TIFFpermit files to work with a wide array of commercially available software packages.

Books, including ePDF books and merchandise: All sales are final on software and multimedia products. Their results are inconsistent. They found the average difference between the reading values of infrared thermometer and glass thermometer was within 0.

The mean of two ear temperatures had better agreement with the rectal temperatures. Conventional ohm meters incorporating continuity testers in either the AC or DC modes in the form of audible beepers, or digital multimeters in the continuity test mode have disadvantages.

A change of approximately degrees Celsius transforms the contrast from an unusable level, shown on the left in the table below, to a level well suited for computer based analysis.

Infrared Detectors

If you are performing infrared electrical inspections, and you are not following these OSHA adopted standards, you need to familiarize yourself with them and comply.

The sensing elements of digital thermometer still need to have contact Standard procedure for testing infrared detectors and for describing their performance.

book the human body. These scanners have one element per line and scan several lines simultaneously. These components included the repeatability of an IR thermometer, the reference thermometer, the blackbody radiator, the transducer of instrument and the resolution of the IR thermometer.

The testing apparatus of claim 4 wherein said infrared radiation source includes at least one infrared radiating diode. Traditional enforcement procedures will continue for those employers who neglect safety and endanger their workers; however, compliance can be simpler and more effective for conscientious employers.

Detailed estimates and procedures for determining uncertainties of the reported values are also presented. The reliability and accuracy of infrared tympanic thermometer have been discussed by many researchers.

Ultimately, a sturdy aluminum substrate was used and a durable infrared coating was developed by mixing infrared pigments with special enamels. The purchaser is responsible for advising ASNT of any customs regulations pertaining to the order and for supplying all proper customs declaration forms with the order.

They concluded that the infrared tympanic thermometer could be applied in an emergency room setting. Most notably, required contrast is clearly visible in all three of the images, which underscores the multi-spectral application of this particular test pattern design. The camera sits on top of the gray box in the foreground.

The first type is the glass mercury thermometer. Results for three key factors — sharpness, distortion, and noise — are described below. Only unused or defective materials will be considered as returns. As an example, for energized equipment with moveable parts, you must be at least 10 feet from any energized component with a voltage between 50 - volts.

List of International Electrotechnical Commission standards

Flir and Fluke seem Standard procedure for testing infrared detectors and for describing their performance. book be the major players in the North American market, with a dozen or so other companies also involved in supplying systems.

Kocoglu et al. These provisions apply to power generation, transmission, and distribution installations, including related equipment for the purpose of communication and metering, which are accessible only to qualified employees.

Failure to comply can result in serious fines and criminal penalties. The second type is the electronic digital thermometer. The typical process for testing the image quality of a visible-light camera system involves acquiring an image of a test chart with known image properties e.

As far as the authors know, there have been no reports of uncertainty evaluations of an infrared tympanic thermometer.

The output of voltage regulator 38 is a regulated 5 VDC and is connected to light emitting diode 39 via current limiting resistor 40 to indicate the presence of the 5 VDC. The pattern is poorly suited to computer-based analysis because it contains only vertical and horizontal lines, which cannot be analyzed to objectively measure sharpness, distortion, noise, or other important image quality factors.

Because of the many slanted edges in the SFRplus test chart pattern, sharpness can be easily measured across the imaging plane, as show in the figure below. However, the response time is from 3 to 5 minutes.Testing of Infrared Focal Plane Array Meng-Lieh Sheu current means a good dynamic performance of detectors.

A large dark current will lessen the the testing of detector array. 22 Test Socket Circuit for Measuring Dark Current To measure dark currents, the detectors can be directly probed at their bump pads. However, the direct. View program details for SPIE Defense + Security conference on Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXIX.

1 1 0 Mercury cadmium telluride (Hg.,Cd*Te) (MCT) photoconductive long wave infrared linear arrays are still in demand due to several advantages.This standard outlines specific content for documenting the results pdf an infrared inspection.

This standard may involve use of equipment in hazardous or remote locations. This standard addresses criteria for infrared imaging equipment, such as spatial resolution and thermal sensitivity.Proc. SPIEInfrared Imaging Systems: Design, Analysis, Modeling, and Testing IX, pg (26 August ); doi: / Read Abstract + The current standard to characterize Electro-Optical system performance is the MRTD (Minimum Resolvable Temperature Difference) for thermal imagers and the MRC (Minimum Resolvable Contrast) for.Jun 16,  · The method and apparatus for testing infrared radiation detectors ebook the present invention incorporates all of these desired capabilities in a single unit package and generally comprises an infrared radiation source for radiating infrared rays to the infrared radiation detector on .