Focus to Detector Distance

Calculation Basis

Software algorithms derive the magnification ratio by comparing the focus to detector distance against the gap between the x-ray source and the sample board. Practitioners define the mechanical separation as the primary variable for controlling spatial resolution during real time imaging. Higher values increase the spread of the electron beam while lower values tighten the projected image.

Any adjustment in this physical clearance alters the pixel pitch relative to the object under observation. Precision in this setting prevents dimensional distortion of small features during high resolution failure analysis.

Performance Limitation

Optical parallax errors arise when the focus to detector distance does not accommodate the height profile of dense electronic assemblies. Angular projections from the source edge cause feature smearing if the sensor plane sits too far from the component array. Shortening the gap between the sensor and the board reduces these edge effects but imposes strict limits on the maximum magnification available for inspection.

Radiographic systems achieve stable throughput only when the mechanical positioning stays locked throughout the duration of the scan sequence. Consistent spatial accuracy relies on the rigidity of the mounting frame supporting both the emitter and the capture hardware.