. 1988 Apr 1;93(2):85–144. doi: 10.6028/jres.093.010

Table 2.

Key dimensions of the hemispheres

Blank	Outside radius, r_c, mm	Inside radius, r_s, mm	rms radial deviation $< δ r_{s}^{2} >^{1 / 2}$ , μm	Concentricity		Cylindrical extension h, mm
Blank	Outside radius, r_c, mm	Inside radius, r_s, mm	rms radial deviation $< δ r_{s}^{2} >^{1 / 2}$ , μm	δx, μm	δy, μm	Cylindrical extension h, mm
			After final polish
#1	107.958	88.918	10	8	5	0.570
#2	107.963	88.938	4	1	1	0.509
			Before final polish
#1	107.949	88.922	5	8	−4	0.537
#2	107.955	88.938	5	2	−5	0.497