Image Quality Testing Software & Charts

SFRplus Chart: Chrome on Glass


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Quick Overview

This chart is produced with the highest precision process we have available.  Read more in our Transmissive Chart Quality Comparison post.

Chrome-on-glass charts are uni-tone, have 10:1 contrast, and do not include a step-chart. This means that they do not support calculation of tonal response curves. These charts are mounted on a 2" x 2" (50.8mm x 50.8mm) substrate that is 0.059" (1.5mm) thick. The star pattern is strictly for use as a focusing aid, and is not intended as a testing feature (i.e., as a star chart).

SFRplus Chart:  Chrome on Glass

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Testing at Infinity can be simulated by using this chart as a reticle in a telescope along with a collimating light source.

The Unitone SFRplus test chart can be used with the SFRplus module in Imatest 3.2 or later to measure MTF, lateral chromatic aberration, and distortion. The SFRplus module features fully automated region-of-interest detection.

The SFRplus chart offers significant advantages over commonly used charts such as the ISO 12233 chart, including

  • much less wasted area
  • the ability to produce a map of sharpness over the sensor surface
  • better measurement accuracy due to the lower contrast
  • full support for automated testing.
Technical Notes:


TypeActive AreaPriceModel Number
Chrome on Glass 19.74mm X 29.91mm $490 QI-SFR15-P-CG