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How is the grid used?

The grid is divided into a focal plane and a back focal plane, and the focal plane is the side that faces the focus of the bulb, also called the “incident surface.” Labeled or marked on the focal plane and marked with the centerline of the grid. When using, the focal plane must face the direction of the tube.

When the convergence grid is in use, the convergence line should coincide with the focus of the tube, so that the original emission line and the lead strip are parallel and can pass smoothly, and the direction of the scattered line is random, rarely coincides with the direction of the lead strip, so it is absolutely large. Part of it is absorbed by lead strips, and the image obtained is clear. Therefore, the grid should be placed as far as possible in the required position to avoid center deviation.

Since grids of the same size have different grid ratios and grid densities, communicate with customers at least by size and grid.

Ge, the density of the grid and the focal length are confirmed in four aspects, it is best to let its labels and parameters.

1, size (Size): length * width, the unit is generally inches, can also be used cm, denoted by S; such as 15 * 18 or 18 * 18

2, ratio (Ratio): also known as grid ratio, grid ratio, is the ratio of lead strip height to lead strip gap, expressed as R; 8:1, 10:1, 12:1…

3. Line rate: The number of lead bars in the unit distance range, denoted by N; 40L/CM, 52, 60, 80, 85…

4. Focal distance: The vertical distance of the lead strip convergence line to the surface of the grid, which is indicated by f. 1 meter, 1.1, 1.2, 1.3, 1.5, 1.8 meters


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