Today I found the IESNA Lighting Handbook in the Library. The Chapter 9 -
Lighting Calculation has mentioned about the interreflection.
The topic discussed is beyond my capacity, ie I'm incapable to handle this.
Many thanks for your advice before.
Samuel Chan
I knew that it is not a simple question. I knew there is software but I
would like to learn the theory/calculation.
Can u advise me any web-sites or books or ... that I can refer to.
Regards
Samuel Chan
You have asked for the content of a year long college class, with pre-
requisites of begining interior design and lighting design. There are
formulas you can look up, and software you can use, they will give you
lots of numbers. However, understanding what you are doing is the hard
part. Just what those numbers mean to a human in a particular place is
not the sort of topic that can be covered easily.
Perhaps if you have a more specific question...
---
RickR
- Show quoted text -
If you can get a copy of the IES lighting handbook and review the
chapter on lighting calculations (chapter 9 in the 9th edition
handbook) it goes into detail on the theory for calculating
interreflection components. There is an example (example 5) that does
it for a simplified case assuming diffuse lambertian reflecting
surfaces in a simple cube room with floor ceiling and walls.
Basically you are using a flux balance method where you need to
calculate the final exitance of of surfaces that are luminous from
interreflection, and add the contribution of those final exitances to
the illuminance of your direct component at the point you are trying
to measure. This is typically done by finite element analysis and
programs like AGI32 use this technique, but in a simple case like
example 5 in the book, the calculation can be done by hand.
