Introduction to Geometric Distortion Test Card T06A

The geometric distortion test card T06A is designed to check geometric distortion and resolution. The test card is similar to a chessboard surrounded by 13 × 18 black and white square areas and rectangular areas at the edges corresponding to the grid grating lines of the electronic test generator 14/19. The horizontal grid lines of the entire graphics generator are divided into 42 rows.

Nine fan-shaped star inner circles are marked with 625 line structures. The larger circular lines mark the structure of line 312. There are 33 white grids distributed horizontally corresponding to the vertical line grating. They correspond to gratings with frequencies of 2, 3.5, and 5 MHz.

Geometric Distortion Test Card T06A Function

1. Check the consistency between geometric shape and grating, and use it in conjunction with a video oscilloscope if necessary.

2. Check the uniformity of signal generation.

3. Check the resolution and its distribution in the image area.

4. Check the back focal length.