Features

Highest Resolution Target Commercially Available

The Super High Resolution USAF targets provide the finest resolution commercially available on the market. With the minimum feature as small as 137 nanometers bar width, typically these features are only easily seen with a scanning electron microscope (SEM). With microscope systems going to higher and higher resolution levels, scientists require special tools like this to help test their most demanding optical systems.

A typical application would be to test a high resolution microscope at the highest magnification.  This product would facilitate the testing of the microscope systems' top resolution. 

Please note that the high resolution targets are the small features in the center of the diamond aperture. The patterns in the square area on the right side of the slide are not test targests.

High Resolution Targets in HIGHRES-1
Clear line features on opaque background

High Resolution Targets in HIGHRES-2
Opaque line features on clear background

Construction

The target area is quartz with 1,000 angstroms of chrome. The quartz substrate is fastened to the metal slide with UV curing epoxy.  Rarely, microscopic amounts of blocking wax may be present post manufacture.  If this is the case, please remove the fragments with D-limonene.  Acetone can work in this case.  However, be wary of using too much which may loosen the epoxy.  Soap and water will also work or any other cleaning agent used to clean microscope objective immersion oil. Do not soak in any solvent. See optic cleaning instructions for additional information.

USAF Test Target Mounting

If you are not testing a microscope and need to mount the resolution target in free space, the M-PPF50

Model: M-PPF50

Optical Filter Mount, Spring-Loaded, 50.8 x 50.8 mm Square Optics

$115.00
In Stock
Product Series Overview
Drop-in Spring Clamp Filter Holders
mount works very well to mate to the HIGHRES targets.  There are two springs that can easily hold the HIGHRES target in place. Please note that the mount is metric, so the mount will only mate to a metric post. The posts, whether metric or english, will have the same diameter, so the post will be able to fit a metric or english post holder. For other mounting options, please check out spring-loaded optical filter mounts.

Spatial Frequency (cycles per millimeter)

  • Element number is the number left or right to the lines.
  • Group number is the number on top of each area.
Element Number Group Number
4 5 6 7 8 9 10 11
1 16.0 32.0 64.0 128.0 256.0 512.0 1,024 2,048
2 18.0 35.9 71.8 143.7 287.4 574.7 1,149 2,299
3 20.2 40.3 80.6 161.3 322.5 645.1 1,290 2,580
4 22.6 45.3 90.5 181.0 362.0 724.1 1,448 2,896
5 25.4 50.8 101.6 203.2 406.4 812.7 1,625 3,251
6 28.5 57.0 114.0 228.1 456.1 912.3 1,825 3,649

Bar/Space Width Calculations (microns)

Element Number Group Number
4 5 6 7 8 9 10 11
1 31.250 15.625 7.813 3.906 1.953 0.977 0.488 0.244
2 27.841 13.920 6.960 3.480 1.740 0.870 0.435 0.218
3 24.803 12.402 6.201 3.100 1.550 0.775 0.388 0.194
4 22.097 11.049 5.524 2.762 1.381 0.691 0.345 0.173
5 19.686 9.843 4.922 2.461 1.230 0.615 0.308 0.154
6 17.538 8.769 4.385 2.192 1.096 0.548 0.274 0.137

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