Table 1.

Calculated Raman areas and x,y measurements of 90‐µm polystyrene microspheres on steel and calcium fluoride with average area and standard deviations for each substrate

	Polystyrene area/µm2		Steel x, y measurements/µm		CaF2 x, y measurements/µm
Measurement	Steel	CaF2	x	y	x	y
1	6285	6471	89	88	87	94
2	6272	5681	87	90	82	88
3	6266	6674	87	89	94	92
4	6124	6043	86	89	86	89
5	6316	5898	85	89	83	89
6	6296	5775	89	88	82	88
Average	6260	6090	87	89	86	90
Standard deviation	63	363	2	1	5	2