Canon CXDI-80C, Service Manual

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5.9 Grid specifications
Grid needs to be procured by sales companies and agents. The table below lists the
specifications of the grids that can be used.
Item Details Remarks
Dimensional
specifications
Exterior
dimensions
383 x 307 [mm]
Allowable tolerance:
0/-1 [mm]
Loading
thickness
dimension
1.0 to 2.5 [mm]
Effective area 359 x 283 [mm] or more
Allowable tolerance:
0/-1 [mm]
Center position
The center of the exterior and center
of the effective area must coincide.
Foil angle
deviation from
exterior
Within 1 [mm] along edges of
effective area
Performance
Grid density 51 to 53 [lines/cm]
Variation in density on
surface: Within ±5%
Variation in
number of lines
in one image
Within ±1%
Grid ratio Determined by user
Selected at discretion
of user.
Focusing
distance
Determined by user
Selected at discretion
of user.
Grid direction Determined by user
Selected at discretion
of user.
Grid surface
Due consideration must be given to
ensuring biological safety (EN ISO
10993-1/5/10) for the surfaces which
can be touched by the patients (for
the EU market).
Other
The ratings of all other items must
comply with JIS 4910-2000.
Precautions
for attaching
the grid
Grid detection
The CXDI-80C Wireless does not
feature any hardware means for grid
detection. However, the
presence/absence and direction of the
grid are identified using software
means by grid stripe suppression
processing.
Grid
attachment
angle
For a grid used in combination with the
detector, a deviation up to 1° from the
attachment angle is allowed from the
perspective of the performance of the
grid stripe suppression processing.
The attachment angle
is the relative angle of
the grid stripes to the
detector pixel rows.