Optical  System  Simulation  Software


Coherent imaging

From projection imaging to scanning optical microscopy to holography, coherent beams of light are used in a variety of image-forming applications. Spatial-frequency limitations, diffraction-related phenomena, and spurious multiply reflected rays contribute to image quality degradation. Using Propagation_in_Free_Space, Mask and Lens options of DIFFRACT, you can analyze many aspects of coherent imaging systems in general, and the effects of phase/amplitude masking and spatial filtering in particular. The example below shows a simple case of projection imaging using a finite-aperture lens.

From left to right: object, at the lens, image.

Using a variety of masks, apertures, and polarization elements, you may create complex patterns of amplitude, phase, and polarization on a coherent beam. These patterns may then be propagated to the near field and the far field, or projected to other planes using lenses and mirrors.


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