File:Fresnel only.JPG
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Summary
| Description |
English: Front view of Fresnel-lens cover used on window of typical passive infrared motion detector. Illuminated from behind by a single point light source. Each spot of light is one of 18 Fresnel lenses. |
| Date | |
| Source | Photographed and uploaded by me. |
| Author | Jack LaRosa |
Licensing
|
I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:47, 28 July 2008 | | 420 × 336 (11 KB) | Deuxdad | {{Information |Description={{en|1=View of Fresnel lens window cover used on passive infrared motion detector. Lit from behind by a point light source}} |Source=Photographed and uploaded by me. |Author=Jack LaRosa |Date=07-26-08 |Permission= |other_version |
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