Table 2.

1D Diffraction-based color filters.

Angle Invariance (${}^{\circ }$)	FWHM (nm)	Efficiency (%)	Ref
0	30	90	[91]
0	60	73	[93]
0	20	80	[94]
0	12	99	[96]
0	NG	90	[107]
35	NG	95	[98]
0	100	70	[99]
0	17	85	[90]
$\pm 80$	NG	NG	[100]

Note: NG = Not given.