Where do antireflective coatings reflect light?

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    Light Optics
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SUMMARY

The discussion centers on the behavior of light when interacting with an index-matching antireflective coating on a conducting substrate, specifically a Salisbury screen. It is established that while destructive interference minimizes specular reflection, energy conservation dictates that any unreflected light must be redirected. The angle of reflection remains consistent with the absence of the coating, as refraction influences all transmitted light. Understanding these principles is crucial for accurately predicting light behavior in optical applications.

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  • Understanding of optical interference principles
  • Familiarity with antireflective coatings and their applications
  • Knowledge of light refraction and reflection laws
  • Basic concepts of energy conservation in physics
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Optical engineers, physicists, and materials scientists interested in the design and application of antireflective coatings and their impact on light behavior.

Christofer Br
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Lets consider an index matching antireflective coating on a conducting substrate (i.e. salisbury screen). The waves reflected destructively interfere in the direction of specular reflection. However, the energy has to be conserved, and since it is not transmitted, it most me reflected in a different direction. How do i figure out the new angle of reflection?
 
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Hi,

In articles they use the term absorbed when there is no reflection. Is there a basis for your
Christofer Br said:
the energy has to be conserved, and since it is not transmitted, it must me reflected in a different direction
 
Christofer Br said:
How do i figure out the new angle of reflection?
The angle for the inevitable tiny bit of reflected light will be the same as if the coating were not there. The light that would have been reflected will go through with the main beam because the refraction acts on everything that goes through.
 

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