Noncontact Measurement for Radius of Curvature of Unpolished Lens

Table 1

Measurement results for a plane-convex lens.

Mutual distance (mm)	Number of arcs	Arc radius (mm)	ROC (mm)	Repeatability error
				Absolute (mm)	Relative (%)
2	a	38.0596	38.1804	0.0006	0.0017
	b	38.1664
4	a	32.0596	38.1801	0.0003	0.0008
	c	38.1678
6	a	32.0596	38.1800	0.0002	0.0006
	d	38.0643
8	a	32.0596	38.1815	0.0017	0.0044
	e	37.8590
10	a	32.0596	38.1820	0.0022	0.0060
	f	37.5451
2	b	38.1664	38.1802	0.0004	0.0011
	c	38.1678
4	b	38.1664	38.1802	0.0004	0.0011
	d	38.0643
6	b	38.1664	38.1809	0.0011	0.0030
	e	38.8590
8	b	38.1664	38.1811	0.0013	0.0035
	f	37.5451
2	c	38.1678	38.1802	0.0004	0.0010
	d	38.0643
4	c	38.1678	38.1792	−0.0006	−0.0015
	e	37.8590
6	c	38.1678	38.1791	−0.0007	−0.0018
	f	37.5451
2	d	38.0643	38.1743	−0.0054	−0.0146
	e	37.8590
4	d	38.0643	38.1751	−0.0047	−0.0125
	f	37.5451
2	e	37.8590	38.1770	−0.0028	−0.0075
	f	37.5451
Average ROC value (mm)			38.1794
Nominal ROC value (mm)			38.1900
Relative error (%)			0.027%