GEMINY-Product-Brochure.pdf - 第5页

Automatic func tions and s ys tem reports Ge miny a ims t o fr e e us e r s fr om r ou tin e wo rk b y au to ma te d fu nc tio ns for calibration and sys tem pe r forman ce tes t s : • Geometric calibration che c ks a nd…

CT – large choice of scans to address different parts

• Quick scan: set the number of projections, rotation angles and

exposure times.

• Quality scan: additionally set the number of images to integrate per

projection.

• Horizontal scan extension: Scan parts of larger diameter by stitching images

into one larger projection. Alternatively, use offset scan where the rotation

axis is positioned to one edge of the detector.

• Vertical scan extension: Stack standard scans at different heights which are

merged into one larger volume.

• Combined horizontal and vertical scan extension: Stack horizontally

extended scans for largest parts.

• HeliExtend scan: Innovative scan process that boosts image quality

signiﬁcantly. Optimal detail recognition is achieved especially for the

largest parts.

• Dual helical scan: combined offset and HeliExtend scan for largest parts.

• FlexCenter (not for FF20 / FF35 CT Metrology): Determination of a new

virtual rotation axis eliminates the need to reposition the test part or use

an XY table.

Geminy’s strength is a ﬂexible selection of various CT trajectories.

Automatic functions and system reports

Geminy aims to free users from routine work by automated functions

for calibration and system performance tests:

• Geometric calibration checks and corrects component orientations and

positions.

• Detector calibrations offer automatic single-gain, multi-gain, and

step wedge calibration. Expert mode with additional options for further

optimization.

• ASTM report is created in accordance to ASTM E1695 for MTF and CDF.

• MPE

: fully automated determination and documentation of maximum

SD deviation referring to VDI/VDE 2630 – Sheet 1.3. Measurements of the

sphere distances of the Yxlon ruby gauge at two positions.

• Separation breaks multiple parts into individual volumes.

Reconstruction workspace and reconstruction improvements

CT systems based on Yxlon Geminy are equipped with separate workstations

for controlling the system and for reconstruction and analysis. The reconstruc-

tion workspace manages reconstructions and calls CERA-algorithms including:

• Jitter correction to eliminate any blurry edges caused by a focus drift or

shifted parts

• Truncation correction to correct truncation artifacts on ROI scans where the

inspected part ﬁlls the entire ﬁeld of view

• Ring artifact correction for processing projections or volume or detector shift

corrections

• Beam hardening correction/reduction: Various methods are available for

reducing these artifacts, including model-based corrections.

• Metal artifact reduction: FSMAR helps in surface extraction, especially with

plastic-metal mixes and metrological applications.

Wheel without Beam-Hardening

Reduction (left) and with

Beam-Hardening Reduction (right)

Electric component

without Jitter Correction (left) and

with Jitter Correction (right)

Plug without Metal Artefact

Reduction (left) and with Metal

Artefact Reduction (right)