This note is a proposal for precise geometry parametrization of planar imaging detectors.
(Xmin,Ymax) ^ Y (Xmax,Ymax) (0,0) | (0,387) ------------------------------ | | | | | | | | | --|-------------+--------------|----> X | | | | | | | | | ------------------------------ (184,0) | (184,387) (Xmin,Ymin) (Xmax,Ymin) |
Optical measurements provide a list of coordinates for all sensor points
Tile # |
---|
Point # | X[µm] | Y[µm] | Y[µm] |
---|
Quality check of optical measurement may include for each tile:
Detector pixels' geometry in 3-d can be unambiguously derived from
The tile location and orientation can be defined by the table of records
Tile # | Xc[µm] | Yc[µm] | Yc[µm] | Rotation angle [degree] | Tilt in X-Y[degree] | Tilt in Y-Z[degree] | Tilt in X-Z[degree] |
---|
where
Tile center coordinates are defined as an average over 4 corners.
Tilt angles are projected angles of the tile sides on relevant planes. Each angle is evaluated as an averaged angle for 2 sides.
Suggested method for imaging detector geometry description provides simple and unambiguous way of pixel coordinate parametrization. This method utilizes all available information from optical measurement and design of the detector and tiles. All geometry parameters are extracted without fitting technique and presented by natural intuitive way.