是否有更改 STEM 旋转角度的命令？

Question

DM脚本语言中是否存在改变STEM旋转角度的显微镜控制命令？即，光束在样品上移动的方向。我想在拍摄之间旋转 90 度。

Answer 1

The scan rotation is part of the scan-parameter set.

You can not change it during a running acquisition. Instead, you restart the acquisition with a new parameter set.

( If you use the UI, then the rotation function does this for you. The scan restarts automatically. )

对于脚本，您可以在使用 DSAcquireData:

开始采集时将旋转指定为参数

number dataType = 4   // 4 byte data
number width    = 128 // pixel
number height   = 128 // pixel
image img := IntegerImage( "Img", dataType, 0, width, height )        // Image has to be of type unsigned-integer
 

number signalIndex = 0
number rotation = 0   // degree
number pixelTime= 2   // microseconds
number lineSync = 1   // activated

DSAcquireData( img, signalIndex, pixelTime, rotation, lineSync )
ShowImage( img )

或者在创建参数集时使用 DSStartAcquisition:

number paramID
number width    = 512 // pixel
number height   = 512 // pixel
number rotation = 0   // degree
number pixelTime= 2   // microseconds
number lSynch   = 1   // activated

number continuous  = 0 // 0 = single frame, 1 = continuous
number synchronous = 1 // 0 = return immediately, 1 = return when finished

paramID = DSCreateParameters( width, height, rotation, pixelTime, lSynch )

number signalIndex, dataType, selected, imageID
signalIndex = 0
dataType    = 2 // 2 byte data
selected    = 1 // acquire this signal
imageID     = 0 // create new image
DSSetParametersSignal( paramID, signalIndex, dataType, selected, imageID )
DSStartAcquisition( paramID, continuous, synchronous )
DSDeleteParameters( paramID ) // remove parameters from memory

以上两个示例均直接从 Digiscan 上的 F1 帮助文档中复制而来：

是否有更改 STEM 旋转角度的命令？

Is there a command to change the STEM rotation angle?

hardware

dm-script