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MLResearchAtOSRAM / tmm_fast

tmm_fast is a lightweight package to speed up optical planar multilayer thin-film device computation. Developed by Alexander Luce (@Nerrror) in cooperation with Heribert Wankerl (@HarryTheBird).
MIT License
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Nan will sometimes appear when calculating reflection coefficients #5

Closed Hiter-ZSH closed 2 years ago

Hiter-ZSH commented 2 years ago

I used the package for genetic optimization and found that nan would appear when calculating reflectance in a large-scale search

Nerrror commented 2 years ago

For which parameters do Nan's appear? Can you give me a minimal example to replicate the problem?

Hiter-ZSH commented 2 years ago 
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    I have sovled this problem. 

        I found that in a few cases, some numbers in the M matrix are very small, very closely to 0, which can lead to a NAN in the calculated reflection coefficient r. So, I changed all the data types to torch.double. Then, it worked fine after that.

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          Re: [MLResearchAtOSRAM/tmm_fast] Nan will sometimes appear when calculating reflection coefficients (Issue #5)

For which parameters do Nan's appear? Can you give me a minimal example to replicate the problem?

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