How to prevent double reflectioln on plexiglass/acrylic material?

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If you place a polarizing filter over the LED display, and if your glass is tilted at about 57 degrees relative to the direction from the display to the viewer's eyes, then there will be almost no reflection from the glass surfaces. That angle is known as Brewster's angle.

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Microbob
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Microbob

Updated on August 23, 2021

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  • Microbob
    Microbob about 2 years

    I have a light source that will reflect readable information off of a piece of Plexiglas. As the question suggests, how can I angle, shift, adjust, or alter my light/Plexiglas to prevent the double reflection caused by the distance between the two sides of the Plexiglas so the viewer can more clearly view the data provided?

    Here's a picture that illustrates my problem:enter image description here

    Thank you!

  • Microbob
    Microbob over 5 years
    Thank you for your response. I apologize for not making my question clear initially, but I am looking for a way to eliminate the second reflection from the Plexiglas while keeping the first one. The goal is for the viewer to see the information projected by the OLED display as shown in the picture. Thanks again!
  • Microbob
    Microbob over 5 years
    Thank you for your response. I apologize for not making my question clear initially, but I am looking for a way to eliminate the second reflection from the Plexiglas while keeping the first one. The goal is for the viewer to see the information projected by the OLED display as shown in the picture. Thanks again!
  • Rob
    Rob over 5 years
    @Microbob - "... viewer to see the information projected by the OLED display as shown in the picture." - So this is from a projector?, and you wish to be able to see the reflection while on the same side as the projector ... -- Same answer.
  • S. McGrew
    S. McGrew over 5 years
    Brewster's angle may still be the answer to your problem. If one surface of the @microbob, Plexiglas has a reflective, semitransparent coating, and the light is polarized and incident at Brewster's angle, then there will be very little if any reflection from the second surface.