The making of robust and highly performing imaging spectropolarimeters for large solar telescopes

Open Access

Table B.1

Prescription of the EST-B FPI ‘mother’ system.

No.	Radius	Thickness	Lens dia	Beam dia	Glass	Label
	(mm)	(mm)	(mm)	(mm)
–						Telescope
–						+ POP
0		infinity
1		100					System stop
2		100					Ideal lens
–						FPI system
3		100					F1
4		80		64	Silica	WBBS
5		195.33		64
6	284.96	8	82	70	PBL1Y	L1
7	117.84	14	82	70	N-FK51A	L1
8	−340.93	345.96	82	70
9		800.82		7.9		P1
10	790.98	24	160	147	N-FK5 **	L2
11	−292.40	39.89	160	147
12	−253.37	16	150	142	PBM2Y	L2
13	−463.09	407.93	160	142
14		140	160	139	Silica	FPI1
15		200	160	139
16		200		136		F2
17		140	160	139	Silica	FPI2
18		407.93	160	139
19	463.09	16	160	143	PBM2Y	L3
20	253.37	39.89	150	143
21	292.40	24	160	147	N-FK5 **	L3
22	−790.98	800.25	160	147
23						P2

Notes. The camera lens is not included here. F1-F3 are focal planes, L1-L4 are cemented doublet lenses, P1-P2 are pupil planes, and WBBS is the wideband beam splitter. The total length from F1 to F3 is 4400 mm.

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