Compare Model Drawings, CAD & Specs Availability Price
RES-1
Resolution Test Target, Glass, Chromium Negative, USAF-1951
$175
In Stock
 RES-1 Resolution Test Target, Glass, Chromium Negative, USAF-1951
In Stock
 $175
RES-2
Resolution Test Target, White Paper, Emulsion Positive
$142
In Stock
 RES-2 Resolution Test Target, White Paper, Emulsion Positive
In Stock
 $142

Features

Resolution Test Target Standards

An element is defined as a set of 3 horizontal bars and 3 vertical bars of the same size. The resolution of the set is defined by the number next to the bar. The group number will specify the size category. Each element has a set resolution based on which group the element belongs to. The resolution of an imaging system under test is defined to be the smallest element size before the lines become indistinguishable. This is based on U.S. Air Force MIL-STD-150A Standard of 1951.

Glass Test Target

The RES-1 target is a 50 x 50 x 1.5 mm optical glass substrate with clear lines on an opaque background. It can be used in transmission and is easily held in FH-2S mounts. RES-1 fully conforms to USAF-1951.

White Paper Test Target

Our RES-2 resolution test targets are black line emulsion on heavy 50 x 50 mm white paper positives. They are ideal for photo lens testing and are a less expensive alternative to the RES-1. Please note that for RES-2, the printing of higher resolution groups beyond Group 4 – Element 4 is done on a best effort basis. Because the grain structure of the paper substrate is unable to support the smaller features, the lines pairs become indiscernible at the higher resolutions. For the most stringent applications, please choose RES-1.

Test Target Mounting

Test targets can be mounted in Newport's spring-loaded optical filter mounts.

Test Target Line Pairs Per Millimeter

Element Number Group Number
0 1 2 3 4 5 6 7
1 1.00 2.00 4.00 8.00 16.00 32.00 64.00 128.00
2 1.12 2.24 4.49 8.98 17.96 35.92 71.84 143.70
3 1.26 2.52 5.04 10.08 20.16 40.32 80.63 161.30
4 1.41 2.83 5.66 11.31 22.63 45.25 90.51 181.00
5 1.59 3.17 6.35 12.70 25.40 50.80 101.60 203.20
6 1.78 3.56 7.13 14.25 28.51 57.02 114.00 228.10

Line pairs/mm = LP
Line width (mm) = 1/(2LP)
Space width (mm) = 1/(2LP)
Line length = 5(line width)