Dichroic Beam Splitter- An Interesting Tale of Beam and Light Put Together

When it comes to the subject of science and quantum physics, the less said the better as this is one area where even the best of the best put their hands up and concede defeat due to its complexity so what to speak of the poor common people.

Even people with basic knowledge of science can understand how difficult a topic it is that cannot be covered up in one or two or even a hundred articles as the best scientists and theorists continued to research more about it till their last breath like Einstein, Newton, Galileo, Fleming and so many others.

Today’s topic follows a similar pattern as the basics can be understood with a few pointers here and there but to understand it in depths is virtually impossible so we too will follow the same path to be on the safer side.


How many of you have heard about the Dichroic beam splitter or prism? To put it simply, it is a prism that splits light into two or more parts but for understanding purposes we shall limit the discussion to two parts as that is easier to sail through in one go.

It is important to mention here that the two beams are of different wavelengths whereas a trichroic prism is one that is even more interesting where you take two prisms (dichroic) to split the lighted image into 3 different colors mostly from red, blue and green as that is what the model has been termed as by the experts and it is called RGB theory.

This prism is quite different from any regular prism whose main purpose is to simply allow the light to pass through it while this one can be categorized as a beam splitter that is used for optical purposes because the splitter itself is an optical instrument taken from filters.

Dichroic prism can be found in various wavelengths but they cannot absorb light completely because the light is transferred in its entirety and as a result cannot be reflected completely, which is why this prism comes into play most of the time.


A dichroic prism is also used by photographers for digital cameras as they are of the belief that if pictures are taken in a digital format, the images are enhanced through the dichroic mirror that gives you the vibes of 3D images.

They typically use this technique to follow through with the RGB theory where different colors can be used for filtering through the images to give you an excellent byproduct.

The dichroic prism separates colors and absorbs very little light as they are mostly directed towards beam splitters while it can be easy on the eye with stunning clarity and no artificial enhancement.

While different colors are used it does not involve the regular artifacts that one gets to see in normal images while the reflection taken through different prisms is a sight to behold where the various beam splitters used are taken from an original source.