R75P High Resolution Positive Image

State: In stock

USAF Test Chart Group 0 to Group 9, Element 3
Sub micron minimum feature size

Warranty: No warranty infomation

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Pattern	Description	Order code
R75P	USAF Test Chart, positive image, groups 0/1 to 9/3	06B01102

Sub Micron smallest feature size - bar width 0.00078mm [0.78µm]

USAF resolution charts are recognised the world over as a universal standard for testing the vertical and horizontal resolution of imaging systems.

Each element on the chart comprises three vertical bars and three horizontal bars, and the detail on these slides is as fine as 0.78 microns (644 line-pairs per mm). The resolution of the imaging system is normally specified as the Group and Element of the finest bars that can be clearly defined.

The following tables show the USAF data as either line-pairs-per-mm or the actual line/bar sizes in mm:-

USAF Resolution Chart, Number of Lines per mm
Element Number	Group Number
	-2	-1	0	1	2	3	4	5	6	7	8	9
1	0.25	0.5	1	2	4	8	16	32	64	128	256	512
2	0.28	0.561	1.12	2.24	4.49	8.89	17.95	36	71.8	144	288	576
3	0.315	0.63	1.26	2.52	5.04	10.1	20.16	40.3	80.6	161	322	644
4	0.353	0.707	1.41	2.83	5.66	11.3	22.62	45.3	90.5	181	362
5	0.397	0.793	1.59	3.17	6.35	12.7	25.39	50.8	102	203	406
6	0.445	0.891	1.78	3.56	7.13	14.3	28.51	57	114	228	456

USAF Resolution Chart, Width of Bars in mm
Element Number	Group Number
	-2	-1	0	1	2	3	4	5	6	7	8	9
1	2	1	0.5	0.25	0.125	0.063	0.031	0.016	0.0078	0.0039	0.002	0.00098
2	1.79	0.89	0.446	0.223	0.111	0.056	0.028	0.014	0.007	0.0035	0.0017	0.00087
3	1.59	0.79	0.396	0.198	0.099	0.05	0.025	0.012	0.0062	0.0031	0.0016	0.00078
4	1.42	0.71	0.355	0.177	0.088	0.044	0.022	0.011	0.0055	0.0028	0.0014
5	1.26	0.63	0.315	0.158	0.079	0.039	0.02	0.0098	0.0049	0.0025	0.0012
6	1.12	0.56	0.281	0.14	0.07	0.035	0.018	0.0088	0.0044	0.0022	0.0011