250
T. Okura
Fig. 10.21 Optical mount of
a VPH grating spectrometer
Fig. 10.22 Hadamard
spectrometer
I k =
n
i=1
P
k
i · I i
(10.14)
where
I k n-summed detector signal corresponding to the different multi-apertures
P
k
i
Multi-aperture pattern
I i Spectral component.
Equation 10.14 can be rewritten as Eq. 10.15. The spectral shape can be calculated from the n signals and n aperture patterns [11]. This is called the Hadamard
spectrometer.