"LED surface light source with a beam angle of 120°, how to simulate it in PMCX? Which type is most suitable?"

[shangdong265]

This is the surface light source code, but when adjusting the divergence angle, the spot size does not seem to change accordingly. When I modified it to a Gaussian light source, the spot shape changes significantly with the beam angle. Which one is most suitable? It is used in a smartwatch, with an LED as the light source and a PD as the detector.
cfg['srcpos'] = [400,600,0]
cfg['srcdir'] = [0,0,1]
cfg['srctype'] = 'disk'
cfg['srcparam1'] = [110,0,0,0]

高斯型：
# 光源设置
cfg['srcpos'] = [300, 300, 0]
cfg['srcdir'] = [0, 0, 1]
cfg['srctype'] = 'gaussian'
cfg['srcparam1'] = [ang, 0, 0, 0]
cfg['srcparam2'] = [led_radius_vox, led_radius_vox, 0, 0]