File:LED Standands.jpg
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Summary
[edit]DescriptionLED Standands.jpg |
English: NIST scientists Yuqin Zong (pictured) and Yoshi Ohno have developed a new method for measuring the optical properties of high power LEDs that will allow manufacturers to accurately obtain and compare data. By mounting the LED on a temperature controlled heat sink, the researchers can test the LEDs at their normal operating temperature (important to commercial manufacturers) at high speed (important to LED manufacturers). |
Date | |
Source | https://www.flickr.com/photos/usnistgov/5941043182/ & https://www.photonicsonline.com/doc/bright-idea-illuminates-led-standards-0001 |
Author | National Institute of Standards and Technology |
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This image was originally posted to Flickr. It has been reviewed on 2023-03-31 07:56:21 by FlickreviewR 2. The image was however no longer available on Flickr, and its copyright status thus undeterminable. |
Public domainPublic domainfalsefalse |
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This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.
العربية ∙ English ∙ 日本語 ∙ македонски ∙ Nederlands ∙ +/− |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 13:14, 24 May 2016 | ![]() | 1,024 × 685 (346 KB) | Stephenpgrange (talk | contribs) | User created page with UploadWizard |
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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 D70 |
Date and time of data generation | 19:49, 20 November 2008 |
Exposure time | 2/5 sec (0.4) |
F-number | f/13 |
Lens focal length | 50 mm |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Width | 2,453 px |
Height | 1,641 px |
Compression scheme | Uncompressed |
Pixel composition | RGB |
Number of components | 3 |
Exif version | 2.21 |
Supported Flashpix version | 1 |
Color space | sRGB |
Image compression mode | 4 |
Image width | 2,453 px |
Image height | 1,641 px |
Date and time of digitizing | 19:49, 20 November 2008 |
Exposure Program | Manual |
APEX exposure bias | 0 |
Maximum land aperture | 4.3 APEX (f/4.44) |
Metering mode | Pattern |
Light source | Flash |
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 | Manual exposure |
White balance | Manual white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 75 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Soft |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
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Flash | Flash fired, strobe return light detected, auto mode |
File change date and time | 06:37, 25 November 2008 |
Software used | Adobe Photoshop CS3 Windows |
Date metadata was last modified | 06:37, 25 November 2008 |