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physical optics
reflective grating


dispersion of a reflective grating in the air observed in the back focal plane of a lens


Caution
Fill in all input cells.
Choose all parameters unit.
the grating is supposed to be in the air or in vacuum.
Diffraction order k, dispersion dy and angles are algebric.
Positive direction and angle positive way are according the arrows in the bottom right of the scheme.

InputValueunit
i
d
lam
k
fi
OutputValueUnit
idto be calculated
dyto be calculated
dispersion of a reflective grating in the air observed in the back focal plane of a lens
i : angle of incidence d : grating pitch lam : wavelength k : diffraction order id : diffraction angle fi : effective focal length of the lens ( fi is positive as the lens is converging ) dy : dispersion ( shift of the diffracted spot in the focal plane for a wavelength variation of + 1 nm )

Note
This calculation page can not detect all unrealistic inputs.



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