Spectroscopy using a visible photonic lantern at the Subaru Telescope: Laboratory characterization and the first on-sky demonstration on Ikiiki (α Leo) and ‘Aua (α Ori)

Open Access

Table A.1

Optical setup of the PL injection.

Focal ratio	6	8	10.6	12	28
BS to L1	62.6	335.2	242.2	183.4	244.6
L1 focal length	500	500	400	400	400
L1 to L2	134.1	37.2	207.1	241.6	10
L2 focal length	400	400	150	150	400
L2 to L3	332.2	119.6	20.7	45	210
L3 focal length	50	150	N/A	N/A	N/A
Back focal length	43.0	91.7	124.4	109.4	181.2
Effective focal length	-134.2	140.4	171.2	189.9	199.6

Notes. Optical setup parameters for various numerical apertures of the beam injected into the PL. Distances and focal lengths are given in mm. (N/A: Not Applicable)

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