Image:Focal cloud.jpg
From Wikipedia, the free encyclopedia
No higher resolution available.
Focal_cloud.jpg (496 × 413 pixels, file size: 66 KB, MIME type: image/jpeg)
[edit] Summary
In this focal cloud illustration, a perfect reflector would focus all beams into blue spot.
But due to imperfections of lens construction, the actual signal beams follow the red path to several different focal points, which form the focal cloud.
The better the lens, the less wide is the focal cloud.
[edit] Licensing
 |
I, the copyright holder of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 20:35, 25 October 2007 | 496×413 (66 KB) | Makrisj (Talk | contribs) | (In this focal cloud illustration, a perfect reflector would focus all beams into blue spot. But due to imperfections of lens construction, the actual signal beams follow the red path to several different focal points, which form the focal cloud. The bet) |
- Search for duplicate files
- Edit this file using an external application
See the setup instructions for more information.
File links
The following pages on the English Wikipedia link to this file (pages on other projects are not listed):
Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
| Orientation | Normal |
|---|---|
| Horizontal resolution | 72 dpi |
| Vertical resolution | 72 dpi |
| Software used | Adobe Photoshop CS2 Windows |
| File change date and time | 23:29, 25 October 2007 |
| Color space | sRGB |
