# Evenness of light source

**URL:** <https://forums.negativelabpro.com/t/evenness-of-light-source/7399>\
**Category:** Digital Camera Scanning\
**Created:** [February 1, 2024, 9:42pm UTC](https://forums.negativelabpro.com/t/evenness-of-light-source/7399 "2024-02-01T21:42:38Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![ArnoG](https://avatars.discourse-cdn.com/v4/letter/a/ac8455/32.png) [@ArnoG](https://forums.negativelabpro.com/u/ArnoG)\
**Post date:** [August 27, 2024, 12:04pm UTC](https://forums.negativelabpro.com/t/evenness-of-light-source/7399/10 "2024-08-27T12:04:50Z")

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> [@Integrating sphere as a uniform backlight](https://forums.negativelabpro.com/t/integrating-sphere-as-a-uniform-backlight/6302/58):
>
> Hi all, As mentioned in the first post in this forum thread, a finite planar light source (such as an LED panel) will always result in an inhomogeneous light distribution on film. A planar light panel a give a homogeneous light distribution on film, provided it is infinitely large compared to the film, which is not practical for table-top solutions. It took me a while to get this done, but I just calculated the brightness inhomogeneity on a film that results from using a planar light source tha…

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