« What is a dichroic mirror?»

Published on 14-08-2022

A dichroic mirror is a mirror that reflects specific wavelengths and transmits other wavelengths. A prism that uses this technology is called a dichroic prism. Philips prism efficiently separates RGB by combining a dichroic coating that reflects specific wavelengths and has a total reflection surface.

As can be seen from the figure, only the blue light is reflected by the first reflecting surface of the light incident on the prism. The reflected blue light is totally reflected by the next surface and reaches the image sensor. The second surface reflects only red light, leaving the remaining light in green. The reflected red colour is totally reflected by the next surface and reaches the image sensor. In this way, Philips prism successfully utilizes reflection of specific wavelengths by dichroic coating and total internal reflection.

 [Philips refers to the company Philips, which patented this type of prism.]

#Industrial Imaging
#MultiModus Camera
# spectroscopy
# multi wave length
#prism spectroscopy
#molecular spectroscopy
#multi sensor

PureSpectra Ltd.


At PureSpectra, we believe in passionate people and that technology can realize Sustainable Development Goals. A world with less waste contribute to a better life. Helping the engineers developing embedded systems for Recycling, Medical, SDGs and Food industries. So we contribute to a sustainable world together.


 By harnessing the power of prism and knowledge of molecular spectroscopic imaging, we can help you to develop with smart sensors embedded systems which will contribute to a better world.


 We believe that combination of smart sensors observing through the same optical path – using a prism - results in better and reliable information for solving your application. The Machine Learning or AI? The algorithm will benefit from the improved data quality.


1.1 PureSpectra Competence


Our core competence is designing and producing Prism devices which can adapt to the wavelength you as customer needs.  Spectroscopic imaging molecular innovation that helps improvement of productivity in the industrial field by our cutting-edge technology of Prism Spectroscopic Imaging. SWIR wavelength


 Our developed manufacturing technology to produce high quality prism modules for the latest smart sensors on the market. This will benefit the needed high quality data you need. As an imaging professional, you know that the image data needs to be of high quality to make it possible to utilize the benefits of AI algorithms.


 We are specialists in creating an embedded prism module with integrated sensors at customer request. Implementing AI in this small modules with prism technology fits our strategy where we match todays sensors provided by the market leaders.


 As we have a flexible organization which is utilized for reasonable series where NRE costs fit to your needs


In 2022 we started our company and end of 2022 we will produce the prism by PureSpectra.


 We can do this as we understand very well the CMOS technology and the needs for multispectral solution in small embedded systems.




Starts with Japanese workmanship to bond the newest high technology sensors to the prism by taking care of the spatial resolution and matching the pixels of the different sensor without compromise and will cover the spectrum from 400nm to 1700nm.