Original file (2,976 × 1,964 pixels, file size: 2.13 MB, MIME type: image/jpeg)
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Summary
| 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
- 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.
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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
Captions
26 February 2011
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 07:57, 2 March 2023 | | 2,976 × 1,964 (2.13 MB) | Shubjt | Uploaded a work by Dominic Alves from https://www.flickr.com/photos/dominicspics/5480234275/ with UploadWizard |
File usage
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Metadata
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If the file has been modified from its original state, some details may not fully reflect the modified file.
| 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 |
| Shutter speed | 0.736966 |
| 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 |