Hi Joep,





I think there are a couple ways you could do this, depending on exactly what you need. If you wanted to achieve this from purely within the macro, and you only need data for a particular angular 'bin' (i.e. between +/-10 degrees, but no other data is required), then I think you're on the right track. Before running the ray trace, you need to set the angular limits. You can do this by:





a. change your detector's min/max angle settings (via the SETNSCPARAMETER keyword in the ZPL)


b. run a new ray trace


c. retrieve the results for the acceptance angle defined in (a)


d. repeat if desired.





I've attached a simple macro to demonstrate; note that this macro assumes the detector is object#3.





The problem is that if you need these results for a range of different angular bins, one approach could be to pre-define a set of Detector Rectangle objects, all of which are nearly co-located in space, and each of which has a particular acceptance angle. Then, you could run a single ray trace, and by retrieving results from different detectors you can see the results for different angular regions. 





A second option would be to use a single ray trace, but make use of filter strings to extract only a particular bin of angular data. This would best be achieved by setting up a Detector Viewer window in 'text' mode, and extracting the data via the GETT() numeric function.





One other option would be to use NSDD in angular mode, but with pix > 0 to retrieve individual pixel value. When used in angular mode, the detector pixels represent angular bins. By using pix>0, you can retrieve data from a single pixel at a time. So, you can retrieve the data from a set of pixels which spans the desired angular region this way, by looping over a subset of detector pixels.

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I’m having the same issue as Joep and am interested in looking at this macro. Whenever I download and extract with any standard zip file utility, it says it’s not an archive. If I change the file extension to .zpl, that also doesn’t work. Any tips? 

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Hi Josh,

 

It worked for me on Windows 10 with the built-in feature. The ZIP contains the ZPL file.

I’m copying its content here for your information:

! NOTE: this assumes the detector rectangle object is #3

clear = NSDD(1, 0, 0, 0)



# set detector object 3's angular max/min to +/-90 degrees

SETNSCPARAMETER 1, 3, 12, -90

SETNSCPARAMETER 1, 3, 13, 90

SETNSCPARAMETER 1, 3, 14, -90

SETNSCPARAMETER 1, 3, 15, 90



NSTR 1, 0, 0, 0, 0, 1, 1

total_power = NSDD(1, 3, 0, 2)

PRINT total_power



# set detector object 3's angular max/min to +/-10 degrees

SETNSCPARAMETER 1, 3, 12, -10

SETNSCPARAMETER 1, 3, 13, 10

SETNSCPARAMETER 1, 3, 14, -10

SETNSCPARAMETER 1, 3, 15, 10



clear = NSDD(1, 0, 0, 0)

NSTR 1, 0, 0, 0, 0, 1, 1



ang_bin_power = NSDD(1, 3, 0, 2)

PRINT ang_bin_power

Take care,

 

David

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Hi dear collegues !

 

How to evaluate the same power (flux) not in rectangular restricted by angle dx , dy, but in some polar df ] like in fiber coupling case NA ?

so the task is find that amount of power not in ractangle dx, dy but in circle with polar angle df ?

 

Regards  

 

 

 

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In non-sequential mode, to measure the power within a specific cone angle, look at using a filter string.  Here’s one of the example strings described in the help documentation:

In this case, the flat object can be a Detector Rectangle.

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