Example 23 - Python
Last update: 09.03.2026import clr, os, winreg
from itertools import islice
import time
import matplotlib.pyplot as plt
import numpy as np
from System import Enum, Int32, Double
class PythonStandaloneApplication(object):
class LicenseException(Exception):
pass
class ConnectionException(Exception):
pass
class InitializationException(Exception):
pass
class SystemNotPresentException(Exception):
pass
def __init__(self, path=None):
# determine location of ZOSAPI_NetHelper.dll & add as reference
aKey = winreg.OpenKey(winreg.ConnectRegistry(None, winreg.HKEY_CURRENT_USER), r"Software\Zemax", 0, winreg.KEY_READ)
zemaxData = winreg.QueryValueEx(aKey, 'ZemaxRoot')
NetHelper = os.path.join(os.sep, zemaxData[0], r'ZOS-API\Libraries\ZOSAPI_NetHelper.dll')
winreg.CloseKey(aKey)
clr.AddReference(NetHelper)
import ZOSAPI_NetHelper
# Find the installed version of OpticStudio
if path is None:
isInitialized = ZOSAPI_NetHelper.ZOSAPI_Initializer.Initialize()
else:
# Note -- uncomment the following line to use a custom initialization path
isInitialized = ZOSAPI_NetHelper.ZOSAPI_Initializer.Initialize(path)
# determine the ZOS root directory
if isInitialized:
dir = ZOSAPI_NetHelper.ZOSAPI_Initializer.GetZemaxDirectory()
else:
raise PythonStandaloneApplication.InitializationException("Unable to locate Zemax OpticStudio. Try using a hard-coded path.")
# add ZOS-API referencecs
clr.AddReference(os.path.join(os.sep, dir, "ZOSAPI.dll"))
clr.AddReference(os.path.join(os.sep, dir, "ZOSAPI_Interfaces.dll"))
import ZOSAPI
# create a reference to the API namespace
self.ZOSAPI = ZOSAPI
# create a reference to the API namespace
self.ZOSAPI = ZOSAPI
# Create the initial connection class
self.TheConnection = ZOSAPI.ZOSAPI_Connection()
if self.TheConnection is None:
raise PythonStandaloneApplication.ConnectionException("Unable to initialize .NET connection to ZOSAPI")
self.TheApplication = self.TheConnection.CreateNewApplication()
if self.TheApplication is None:
raise PythonStandaloneApplication.InitializationException("Unable to acquire ZOSAPI application")
if self.TheApplication.IsValidLicenseForAPI == False:
raise PythonStandaloneApplication.LicenseException("License is not valid for ZOSAPI use")
self.TheSystem = self.TheApplication.PrimarySystem
if self.TheSystem is None:
raise PythonStandaloneApplication.SystemNotPresentException("Unable to acquire Primary system")
def __del__(self):
if self.TheApplication is not None:
self.TheApplication.CloseApplication()
self.TheApplication = None
self.TheConnection = None
def OpenFile(self, filepath, saveIfNeeded):
if self.TheSystem is None:
raise PythonStandaloneApplication.SystemNotPresentException("Unable to acquire Primary system")
self.TheSystem.LoadFile(filepath, saveIfNeeded)
def CloseFile(self, save):
if self.TheSystem is None:
raise PythonStandaloneApplication.SystemNotPresentException("Unable to acquire Primary system")
self.TheSystem.Close(save)
def SamplesDir(self):
if self.TheApplication is None:
raise PythonStandaloneApplication.InitializationException("Unable to acquire ZOSAPI application")
return self.TheApplication.SamplesDir
def ExampleConstants(self):
if self.TheApplication.LicenseStatus == self.ZOSAPI.LicenseStatusType.PremiumEdition:
return "Premium"
elif self.TheApplication.LicenseStatus == self.ZOSAPI.LicenseStatusTypeProfessionalEdition:
return "Professional"
elif self.TheApplication.LicenseStatus == self.ZOSAPI.LicenseStatusTypeStandardEdition:
return "Standard"
else:
return "Invalid"
def reshape(self, data, x, y, transpose = False):
"""Converts a System.Double[,] to a 2D list for plotting or post processing
Parameters
----------
data : System.Double[,] data directly from ZOS-API
x : x width of new 2D list [use var.GetLength(0) for dimension]
y : y width of new 2D list [use var.GetLength(1) for dimension]
transpose : transposes data; needed for some multi-dimensional line series data
Returns
-------
res : 2D list; can be directly used with Matplotlib or converted to
a numpy array using numpy.asarray(res)
"""
if type(data) is not list:
data = list(data)
var_lst = [y] * x;
it = iter(data)
res = [list(islice(it, i)) for i in var_lst]
if transpose:
return self.transpose(res);
return res
def transpose(self, data):
"""Transposes a 2D list (Python3.x or greater).
Useful for converting mutli-dimensional line series (i.e. FFT PSF)
Parameters
----------
data : Python native list (if using System.Data[,] object reshape first)
Returns
-------
res : transposed 2D list
"""
if type(data) is not list:
data = list(data)
return list(map(list, zip(*data)))
if __name__ == '__main__':
zos = PythonStandaloneApplication()
# load local variables
ZOSAPI = zos.ZOSAPI
TheApplication = zos.TheApplication
TheSystem = zos.TheSystem
# Set up primary optical system
sampleDir = TheApplication.SamplesDir
testFile = sampleDir + "\\Sequential\\Objectives\\Double Gauss 28 degree field.zos"
TheSystem.LoadFile(testFile, False)
max_rays = 150
#! [e23s01_py]
max_field = 0
for i in range(1,TheSystem.SystemData.Fields.NumberOfFields + 1):
if TheSystem.SystemData.Fields.GetField(i).Y > max_field:
max_field = TheSystem.SystemData.Fields.GetField(i).Y
#! [e23s01_py]
max_num_field = TheSystem.SystemData.Fields.NumberOfFields
# sets up plot
plt.close('all')
plt.rcParams["figure.figsize"] = (15, 8)
colors = ('b', 'g', 'r', 'c', 'm', 'y', 'k')
tic = time.time()
#! [e23s02_py]
# Set up Batch Ray Trace
raytrace = TheSystem.Tools.OpenBatchRayTrace()
nsur = TheSystem.LDE.NumberOfSurfaces
normUnPolData = raytrace.CreateNormUnpol(max_rays + 1, ZOSAPI.Tools.RayTrace.RaysType.Real, nsur)
#! [e23s02_py]
#! [e23s03_py]
# define batch ray trace constants
hx = 0
# since python doesn't include STOP number in range, need to use STOP value slightly more than 1
py_ary = np.arange(0, 1.0001, 1 / max_rays) * 2 - 1
px = 0
max_wave = TheSystem.SystemData.Wavelengths.NumberOfWavelengths
#! [e23s03_py]
# initilize x/y image plane arrays
y_ary = np.zeros((max_num_field + 1, max_wave + 1, max_rays + 1))
#! [e23s04_py]
# image surface number and primary wavelength
nsur = TheSystem.LDE.NumberOfSurfaces
pwav = 0
for a in range(1, TheSystem.SystemData.Wavelengths.NumberOfWavelengths + 1):
if TheSystem.SystemData.Wavelengths.GetWavelength(a).IsPrimary == 1:
pwav = a
# creates array of Y coordinate chief ray values
chief_ary = np.zeros(max_num_field)
for field in range(1, max_num_field + 1):
#hy = TheSystem.SystemData.Fields.GetField(field).Y / max_field
hy = 1 if max_field == 0 else TheSystem.SystemData.Fields.GetField(field).Y / max_field
# gets single value without using MFE (see ZPL OPEV)
chief_ary[field - 1] = TheSystem.MFE.GetOperandValue(ZOSAPI.Editors.MFE.MeritOperandType.REAY, nsur, pwav, 0, hy , 0, 0, 0, 0)
#! [e23s04_py]
# setup plot
for field in range(1, max_num_field + 1):
if (field == 1):
ax1 = plt.subplot(2, max_num_field, field + max_num_field)
else:
plt.subplot(2, max_num_field, field + max_num_field)
hy = 1 if max_field == 0 else TheSystem.SystemData.Fields.GetField(field).Y / max_field
for wave in range(1, max_wave + 1):
#! [e23s05_py]
# Adding Rays to Batch, varying normalized object height hy
normUnPolData.ClearData()
for i in range(0, max_rays + 1):
py = py_ary[i]
normUnPolData.AddRay(Int32(wave), Double(hx), Double(hy), Double(px), Double(py), Enum.Parse(ZOSAPI.Tools.RayTrace.OPDMode, "None"))
#! [e23s05_py]
#! [e23s06_py]
# Run Batch Ray Trace
raytrace.RunAndWaitForCompletion()
#! [e23s06_py]
#! [e23s07_py]
# Read and display results
normUnPolData.StartReadingResults()
# Python NET requires all arguments to be passed in as reference, so need to have placeholders
sysInt = Int32(1)
sysDbl = Double(1.0)
output = normUnPolData.ReadNextResult(sysInt, sysInt, sysInt,
sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl);
while output[0]:
if (output[2] == 0 and output[3] == 0):
y_ary[field, wave, output[1] - 1] = output[5]
# Python NET requires all arguments to be passed in as reference, so need to have placeholders
output = normUnPolData.ReadNextResult(sysInt, sysInt, sysInt,
sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl, sysDbl);
plt.plot(py_ary[:], np.squeeze((y_ary[field, wave,:] - chief_ary[field - 1]) * 1000), '-', ms = 4)
#! [e23s07_py]
raytrace.Close();
manual = round(time.time() - tic, 3)
tic = time.time()
#! [e23s08_py]
ray = TheSystem.Analyses.New_Analysis(ZOSAPI.Analysis.AnalysisIDM.RayFan)
ray_settings = ray.GetSettings()
ray_settings.NumberOfRays = max_rays / 2
ray_settings.Field.UseAllFields()
ray_settings.Wavelength.UseAllWavelengths()
ray.ApplyAndWaitForCompletion()
ray_results = ray.GetResults()
#! [e23s08_py]
for field in range(1, max_num_field + 1):
#! [e23s09_py]
# Read and display results
if field == 1:
ax2 = plt.subplot(2, max_num_field, field)
else:
plt.subplot(2, max_num_field, field)
ds = ray_results.GetDataSeries(field *2 - 2)
# get raw .NET data into numpy array
xRaw = np.asarray(tuple(ds.XData.Data))
yRaw = np.asarray(tuple(ds.YData.Data))
x = xRaw
y = yRaw.reshape(ds.YData.Data.GetLength(0), ds.YData.Data.GetLength(1))
plt.plot(x, y)
hy = 1 if max_field == 0 else TheSystem.SystemData.Fields.GetField(field).Y / max_field
plt.title('Field: %4.3f' % (hy))
#! [e23s09_py]
native = round(time.time() - tic, 3)
print('Tracing ' + str(max_rays + 1) + ' number of rays')
print('Elapsed time is ' + str(native) + ' seconds with native code')
print('Elapsed time is ' + str(manual) + ' seconds with manual code')
print('The native code is ' + str(round((manual - native) / native * 100, 2)) + '% faster')
ax1.set_ylabel('Manual Code (%.3fs)' % (manual))
ax2.set_ylabel('Native Code (%.3fs)' % (native))
plt.subplots_adjust(wspace=0.5)
# This will clean up the connection to OpticStudio.
# Note that it closes down the server instance of OpticStudio, so you for maximum performance do not do
# this until you need to.
del zos
zos = None
# place plt.show() after clean up to release OpticStudio from memory
plt.show()
