Talk:Bidirectional reflectance distribution function

Physics Stub‑class High‑importance

	Physics portal This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics
Stub	This article has been rated as Stub-class on Wikipedia's content assessment scale.
High	This article has been rated as High-importance on the project's importance scale.

This article could use more context. Who uses this parameter, and for what?--Srleffler 01:50, 14 April 2006 (UTC)[reply]

Expanded a bit. `'mikka (t) 02:31, 14 April 2006 (UTC)[reply]

Measurement of BRDF

The third paragraph should be stricken. The statement that the BRDF function cannot be measured because it represents infinitessimal solid angles is not logical. The statement that BRDF cannot be measured due to the infinitessimality of the input parameters is equivalent to saying that one cannot measure any physical quantity that is not immediately discreet. One can measure the function with the best possible angular resolution, and then (by applying the sampling function) deconvolve the instrument function and reconstruct the original BRDF.

Instruments that measure BRDF are readily used in the optics community to determine the BRDF of the materials used to shield optical systems. Without measurements of BDF, stray light predictions would not be possible. —The preceding unsigned comment was added by 192.91.172.36 (talk) 21:42, 16 March 2007 (UTC).[reply]