Table 1:

Comparison of different snapshot spectral imaging technologies.

Type	Device	Spectral range/nm	Spectral resolution/nm	Spatial resolution/px	Size	Reconstruction speed/fps
Spatial-spectral mapping spectral imaging	Slicer mirrors	[161]: 520–660	5.6	100 × 100	Table-top	N/A
		[162]: 450–650	3.3	285 × 285	Table-top	N/A
		[13]: 480–1000	0.26	300 × 300	Room-sized	N/A
	Lenslet array	[163]: 400–760	0.74	268 × 76	Table-top	N/A
		[24]: 500–650	0.82–4.17	35 × 35–40 × 40	Table-top	N/A
	Optical fiber bundle	[30]: 450–750	4.9	188 × 170	Table-top	N/A
		[164]: 515–570	2.75	350 × 350	Table-top	N/A
		[165]: 400–1050	3.2	∼63 × 63	Table-top	N/A
		[165]: 950–5000	8	22 × 22	Table-top	N/A
	Kösters prism	[39]: 800–1700	225	–	Table-top	N/A
	Linear variable filter	[45]: 380–850	5.8	400 × 400	Hand-sized	N/A
Coded reconfiguration spectral imaging	Coding mask	[166]: 455–650	5.9	256 × 248	Table-top	30
		[167]: 3770–4800	10	640 × 480	Table-top	50
		[168]: 7,700–14,000	94	640 × 512	Table-top	50
	Filter array	[169]: 406–688	25	∼1008 × 759	On-chip	–
		[142]: 450–650	10	640 × 480; 1920 × 1080	On-chip	32.3; 7.14
[170]: 1500–1800	16	80 × 60	On-chip	–
	Diffractive optical element	[88]: 470–740	5	203 × 203	Table-top	–
[100]: 420–650	9.2	1440 × 960	Hand-sized	7.8
Metasurface-based spectral imaging	Dispersive metalens	[138]: 400–667	4	3600 × 3600	On-chip	–
	Off-axis focusing metamirror	[141]: 480–650	9.4	–	On-chip	–
	Metasurface filters array	[156]: 450–750	0.8	356 × 436	On-chip	>30
	Parallel metasystems	[140]: 795–980	9.25	∼240 × 240	On-chip	–