File:Visa Dove Hologram Rainbow.jpg
Original file (2,976 × 1,964 pixels, file size: 2.13 MB, MIME type: image/jpeg)
Captions
Summary[edit]
DescriptionVisa Dove Hologram Rainbow.jpg |
English: A white light "Rainbow" transmission hologram. There is no 3D illusion when the hologram is rotated through 90°, but there is the advantage that the image can be viewed without the need for a coherent light source such as a laser. The "backlighting" is provided by printing / micro embossing the hologram on a reflective film.
Photographed using extension tubes. The full range of rainbow colours seen in a single view was obtained by placing the small illuminating light source (a halogen desk lamp) very close (a few centimeters) to the hologram, so that the angle of incidence of light varied significantly over the surface of the dove. The interference pattern needed for the dove hologram must be recorded at a resolution of approximately 1,400 fringes per mm / 35,000 fringes per inch, making holograms difficult to forge. As an additional security measure (one of very many), more than one (subtly different) version of the hologram is in use. Which one is used where? Ahhh. Now that's a secret... |
Date | |
Source | https://www.flickr.com/photos/dominicspics/5480234275/ |
Author | Dominic Alves |
Licensing[edit]
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by Dominic's pics at https://flickr.com/photos/64097751@N00/5480234275. It was reviewed on 2 March 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
2 March 2023
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 07:57, 2 March 2023 | 2,976 × 1,964 (2.13 MB) | Shubjt (talk | contribs) | Uploaded a work by Dominic Alves from https://www.flickr.com/photos/dominicspics/5480234275/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org
- Usage on sr.wikipedia.org
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 | Canon |
---|---|
Camera model | Canon EOS 300D DIGITAL |
Exposure time | 3/5 sec (0.6) |
ISO speed rating | 100 |
Date and time of data generation | 20:13, 26 February 2011 |
Orientation | Normal |
Horizontal resolution | 240 dpi |
Vertical resolution | 240 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 00:45, 27 February 2011 |
Exposure Program | Manual |
APEX shutter speed | 0.736966 |
APEX exposure bias | 0 |
Metering mode | Center weighted average |
Flash | Flash did not fire |
Color space | Uncalibrated |
Image width | 2,976 px |
Image height | 1,964 px |
Serial number of camera | 0670235610 |
Rating (out of 5) | 0 |
Date and time of digitizing | 00:25, 27 February 2011 |
Date metadata was last modified | 00:45, 27 February 2011 |
IIM version | 2 |