Are you looking for a product that selectively transmits one portion of the spectrum while rejecting others?
If yes, then you are at the right place. Here we are going to talk about one such product that can help you do that exactly.
The product we are going to talk about is Optical Filters.
We will be discussing about optical filters, their types, usage, and more.
What are Optical Filters?
Optical Filters are the kind of products with the help of which you can transmit one port of the optical spectrum and neglect all other portions easily.
If you are aware of microscopy, we would like to tell you that optical filters are used in it. Not just that optical filters are also used in machine vision and chemical analysis.
There are various types of optical filters based on their precision levels and filter types.
You can pick them as per your requirements.
Terminology of Optical Filters
There are a number of terminologies that make optical filters extremely different from the rest of the filters. Let us have a look at those terminologies:
- The first terminology is the center wavelength, in traditional coated optical filters maximum transmission is achieved near the center wavelength. While in the case of hard-coated optical filters you have a fairly flat transmission over spectrum wavelength.
- The next factor is the bandwidth of the optical filter. It is known as the wavelength range, through which the incident energy passes.
- There are many more such terminologies such as blocking range, slope, optical density, and more.
This was all about a few terminologies of optical filters. Let us now talk about the different types of optical filters.
Types of Optical Filters
There are 2 general categories of optical filters, which are absorptive filters and dichroic filters.
Absorptive filters absorb certain wavelengths and throw out other wavelengths. While on the other hand, dichroic filters are completely opposite of absorptive filters, as in this case, they reflect certain wavelengths.
This was all about the general categories, but here we are going to talk about the rest of the types of optical filters too, which are as follows:
- The first type is monochromatic filters, and this type of optical filter transmits just one light. So if you are looking forward to such an optical filter that transmits only one light then this is your option.
- The next from the list is infrared filters which are also considered heat-absorbing filters that can help you transmit visible light and block the mid-infrared light spectrum.
- Here we have ultraviolet filters with the help of which you can block UV rays and pass the visible light. This is one of the most used optical filters.
- The next option from the list is neutral density filters which make every light less intense.
This was all about some of the most in-demand types of high-performing optical filters. There are plenty of other options too, such as long pass filters, short pass filters, bandpass filters, and more.
How to select the right Optical Filters?
There are companies that are offering the best quality optical filters, while there are companies offering the worst quality filters.
A few ways with the help of which you can pick the best quality high performing optical filters are as follows:
- Make sure that you are picking up a trustworthy brand and not just any company. You can check out Alluxa for the best optical filters.
- You can check out the previous reviews of the company you are dealing with. With the help of which you can get a better idea about the products and services offered by them.
We are sure that you must have got to know a lot of things about high-performing optical filters through this post. We also had a look at the various types of optical filters, their uses, and how we can pick the best optical filters for ourselves.