Dear @xiongbp,
Fluka scores “all optical photons”. What does “all” mean?
Remember that Fluka simulates optical photons only when requested. In order to do so, it requires to be provided, as input, the wavelengths of the optical photons to be simulated. These wavelength can be shifted, as you have seen in Optical photon production and transport. The photons with shifted wavelengths would be scored as well.
Summarizing, all photons means all photons having the wavelengths you provided in input plus all those having wavelengths as you “shifted”.