Details
Our standard test chart has the following options:
10:1 and 2:1 contrast ratios Use of both contrast levels improves ability to analyze non-linear signal processing, which may not affect the lower contrast 2:1 contrast ratio regions
Semi-gloss paper has slightly higher detail than matte, has deeper black tones on the stepchart, and is recommended for most applications except for wide-angle lenses.
- 5x7 grid dimension is recommended for typical compact camera formats with aspect ratios of 4:3.
Paper Size and Active Area
It is recommended that the medium sized charts be used to test imaging systems with sensors up to 12 MP.
| Paper Size | Active Area | |
| Medium | 24" x 40" | 22" x 39.22" |
The active area of the chart includes white space above and below the top and bottom distortion bars. It is slightly larger than the printed area, which is bounded by the distortion bars on top and bottom. White space is included in active area because test images of the chart must include this white space in order to enable automated processing in SFRplus software.
Ink Jet Chart Resolution
This chart, and all our ink jet printed charts have an approximate MTF50 of 5 cycles/mm. Please keep this in mind when choosing the size of chart. Using a chart that is too small with a high-resolution sensor can result in the MTF of the chart degrading the measured MTF of the camera system.
Need different options?
Check out our configurable SFRplus charts in 10:1 contrast ratio, or 4:1 contrast ratio.
Custom variations of the SFRplus chart are available. Please contact sales@imatest.com to discuss your specific requirements.
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