Converting Correction Files - Scanlab RTC 5 PC Interface Board Installation And Operation Manual

(9) Differentiation between correction with or
without an F-Theta objective
The following applies:
Parameter = 10 * P + P
Obj
– P = 0: Correction without F-Theta objective
Obj
P = 1: Correction with F-Theta objective
Obj
– if correction with F-Theta objective:
P = 0.0: without distortion data
Typ
P = 1.0: with F-Theta's F-stop progression
Typ
condition
P = 2.0: with image height table
Typ
(10)Indicator for the source of the correction file
The following applies:
Parameter = 1000 * P
Orig
– P = 10000: Original file
Orig
(as originally calculated)
P = 20000: converted from ctb file
Orig
P = 30000: reconstructed from txt file
Orig
If a correction file is modified by the correXion5
software or by another correction program,
then P will be incremented by 1 each time
Orig
– P = Version number of the program used to
Ver
create the correction file
(11)Information about inverse tables.
The following applies:
Parameter = P + 2 * P
Exist
– P = 1.0: valid inverse table is present
Exist
P = 0.0: no valid inverse table present
Exist
– if valid inverse table is present:
P = 0: inverse table calculated ab initio
Calc
P = 1: inverse table numerically calculated
Calc
(12)Scan system's angle calibration
Mechanical angle deflection in [± °] for 96% of
maximum deflection
(13)Indicator for the scan head geometry used for
the calculation (for internal use only), e.g.:
– = –1.0: unknown geometry (e.g. for a table
converted from a ctb file)
– = 0.0: standard geometry
(14)Indicator for whether an additional protective
glass was taken into account
The following applies:
Parameter = 1000000 * P
– P = protective glass thickness in mm (max. 2
T
decimal places)
– P = refraction index (max. 3 decimal places)
I
Example: The value 3521450.0 corresponds to a
protective glass thickness of 3.52 mm and a
refraction index of 1.450.
®
RTC 5 PC Interface Board
Rev. 1.9 e
7 Basic Functions for Scan Head and Laser Control
(15)Indicator for whether the image field size was
with
Typ
Notes
+ P with
Ver

Converting Correction Files

The delivered product includes the program
CorrectionFileConverter.exe for converting RTC
correction files (ctb) into RTC
and vice versa. Program usage is described in the
accompanying guide.
When converting a ctb file into a ct5 file, the latter's
with
file header will receive an origin indicator (parameter
Calc
10, P
fully complete RTC
conversion, the file header lacks a variety of param-
eters, which can be subsequently added via the
CorrectionFileConverter.exe program. Moreover,
conversion of numerically calculated inverted
correction tables sometimes results in incomplete
scan field coverage or even no inverse correction
table at all (also see parameter 11,
In contrast, converting a ct5 file into a ctb file results
in a fully complete ctb correction file. The ctb file's 2D
tables then won't contain the parameters from the
ct5 file header, whereas the 3D tables will contain
only some of them.
+ 1000 * P with
T I
clipped in the correction file
– = 0.0: field size not clipped
– = 2.0: field size clipped
• A ct5 file created by converting another ctb file
will not contain all parameter data (see below).
The same applies to a 1to1 correction table.
• Parameters 3-7 are only relevant for 3D vector
commands and are set to 0 in 2D correction
tables.
• If the correct calibration factors are used (see
page 172), then the same ABC coefficients
(parameters 5-7) can be used on the same 3-axis
®
scan system with RTC 4 boards (ctb files) and
®
RTC 5 boards (ct5 files).
= 20000). Such conversions do not produce
Orig
®
5 correction files. After
®
4
®
5 correction files (ct5)
page 125).
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