TE269 version 3 (V3) uses the same data measurements as version 2 but has a slightly different hardware design than V2 for increased stability. The original version of the TE269 uses two plates of glass built around the chart film. On occasion, we encountered a few problems with stray light and reflections from the glass. Version 3 replaces the glass with a metal frame, which greatly reduces the chance of stray light and reflections.
When working with high dynamic range cameras, it is normal to use OECF charts with patch densities according to ISO 14524. However, many of these charts have large gaps between the high-density patches because they are calculated using the cube root formula.
Our 36 patch OECF TE269B V3 chart presents a solution to this problem. While these charts still closely follow IS0 14524, it also implements additional steps to address the higher density levels. High dynamic ranges up to 1.000.000:1 / 120 dB are attainable using these charts. In addition, they also benefit from having a stable production process and being strongly neutral.
Transparent test charts are best illuminated using a uniform illumination device such as the high-powered LG3 light box.
The iQ-Analyzer-X software can be used for obtaining more accurate results of OECF, dynamic range, SNR, noise, temporal noise, and visual noise.
Technical information
These transparent test charts are available in size D280
The aspect ratio of the test pattern is 16:9 with integrated markers for 4:3 and 3:2 formats
36 patches with densities from 0.03 up to more than 6 (for 1.000.000:1 / 120 dB and higher)
The standard version of TE269 V3 uses a screening to form the gray levels
The three variants available are:
TE269A V3
Gray patches according to ISO 14524.
TE269B V3
Better differentiation of the dark patches. The steps are based on the supporting points of the TE264 (20 patch chart) with a spreading of the steps in between.
TE269C V3*
This version has been adapted to the requirements of the standard IEC 62676-5: Video surveillance systems for use in security applications – Part 5: Data specifications and image quality performance for camera devices.
*For TE269C V3 we recommend using with a strong illumination device, e.g., LG3
TE269M
We also offer the TE269M version of the chart that uses a “mask” to create a black background. While the chart's normal film has mid-density, it does not reach black, and depending on the test setup, ambient light may be too high. As a result, we offer a masked version that completely eliminates unwanted light transmission in certain applications, for example, as specified in the IEC-62676 standard for testing security camera systems.
The TE269 is supported by the iQ-Analyzer-X image evaluation software.
*The exact layout and dimensions may differ from the illustration above.