Repeated Scan with Bidirectional Segments

A repeated scan that takes advantage of bidirectional segments for better scan efficiency is obtained using RepeatedPattern. It can be used directly for a custom scan or access conveniently through RepeatedRasterScan or RepeatedRadialScan. The sample below uses RepeatedRasterScan to illustrate a bidirectional repeated scan.

1. Import and instantiate RepeatedRasterScanConfig.

   from vortex.scan import RepeatedRasterScanConfig, RepeatedRasterScan
   cfg = RepeatedRasterScanConfig()
   

2. Configure bidirectional segments.

   cfg.bidirectional_segments = True
   

   Each segment within a bidirectional scan normally has a fixed direction. If repeat_period is odd, one segment may alternate directions.

3. Configure repetition options using the fields inherited from RepeatedPattern. repeat_count determines the number of repeats for each segment whereas repeat_period determines the number of segments between repeats.

   cfg.repeat_count = 2
   cfg.repeat_period = 4
   

   This configuration will repeat every segment twice (repeat_count) in groups of four (repeat_period). Each group of four will complete its repetitions before the next group of four starts.

4. Initialize the RepeatedRasterScan as usual.

   scan = RepeatedRasterScan()
   scan.initialize(cfg)
   

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