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Ansys Learning Forum › Forums › Discuss Simulation › Photonics › light source blockage in Lumerical › Reply To: light source blockage in Lumerical

August 1, 2024 at 8:17 pm
Guilin Sun
Ansys Employee

You may need to know how the image is produced: when the object distance is almost zero, the image cannot be real! what you got in the focal plane is the spatial spectrum of the obstacle in theory! Please check Goodman's Fourier Optics.

You have to find where the image is located in order to see the image. In your configurtion the object is located within one focal length the image will be not real at any distance after the metalens.