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A special application is the generation of (non-diffractive) Bessel beams, which are mainly defined by the cone angle (α) of the axicon. Accordingly, for a lot of applications there are two regions of interest:

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Using mounted axicons is one possibility to avoid this effect. asphericon developed special mountings with an outer diameter of 30 mm, which can easily be integrated into existing optical systems via adapters. The axicons are perfectly aligned to the optical and mechanical axis and provide comfortable solutions for laser applications. Find out more about mounted optics and adapters in our webshop.

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Axicons are conical lenses which create a ring-shaped beam used in research or rather different laser applications. They can be either convex or concave and made from almost any optical material. By combining two or more axicons and lenses multiple intensity profiles can be created.

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Using polarizing filter sheets also helps to conserve energy by blocking out large amounts of sunshine that would otherwise have to be blocked with blinds or curtains. This ability to effectively block out light makes polarizing filters desirable for home and office settings alike, allowing users to save on heating and cooling costs while still enjoying the brightness of natural light.

A detailed description of the functionality and the specifics of axicons can be found in our whitepaper, which is available for download here.

Polarizing film sheets are widely used in fields such as photography and videography because they produce high contrast. These sheets are composed of a polymer material that contains hundreds of small, parallel molecules that are aligned in the same direction and create an orderly array called a dichroic filter.

Furthermore, polarizing filter sheets can enhance the visibility of outdoor displays such as storefronts or signs, as they reduce reflections and amplify colors for an enhanced viewing experience.

Another application is the generation of Bessel beams, which length and width can be influenced by the input beam diameter (Fig. 6). To adjust the length and width of the Bessel beam different Beam Expanders can be combined with the axicon.

The optical effects created by the filter allow polarizing filters to absorb particular light while reflecting or transmitting other light waves. Polarizing films absorb reflected light waves along with scatter away the non-aligned directional waves, thus improving the image contrast.

Polarizing film sheets are a versatile component of display and window applications. These specialized forms of film employ laminated polarizers designed to enhance the image quality of LCD displays, as well as reduce glare in windows.

The length (a) depends on the axicon angle (α) and the diameter (ØEP)of the incoming beam, whereas the width of the Bessel beam is regulated by the angle only (Fig. 2). Fig. 1 shows the diameter of the ring-shaped light distribution (d) which depends on the distance (l) and increases with growing distances (l). Thus, the ring width is about half the diameter of the incoming beam

Spherical aberration is one of the basic imperfections of a spherical lens. It means, that parallel rays of the incoming beam do not find the same focal point after passing a spherical lens. The use of axicons also provide relief here. By modifying the incoming beam to a ring (Fig. 7) the focus of a spherical lens can be improved. This phenomenon can be explained by zonal decomposition of the spherical surface. Illuminating just one ring-shaped zone, the effect of spherical aberration can be avoided. Changing the distance between the axicons, it is possible, to vary the ring-shaped zones and subsequently, to shift the generated spot along the optical axis. Using the same setup to illuminate an aspheric lens will allow focussing below the diffraction limit (Fig. 8).

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Polarizing film sheets are an economic, efficient way to reduce glare and ultraviolet radiation from sunlight. By equipping windows or LCD screens with polarizing film sheets, people can protect their eyesight while enjoying a comfortable viewing experience.

In addition to creating high-contrast images, this type of material is also used for sun protection and helps reduce glare in different types of displays.

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As a polarizing film sheet material supplier, we often get questions about how to best use our polarizing film sheets. In this blog post, we’ll explore the potential of this unique material and how it can be used in a variety of applications. By unlocking the potential of this versatile material, you’ll be able to create stunning results in your projects. Stay tuned to see what possibilities await you with our polarizing film sheets!

Similarly, absorptive films are designed to absorb and minimize glare while reflective films are used primarily for increasing the levels of illumination and contrast. Polarizing films offer efficient optical solutions for a variety of industries including aerospace, communications, defense, medical imaging technology, solar energy systems, automotive lighting applications, and more.

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Furthermore, axicons are also used in optical trapping. The ring of light (Fig. 5) creates attractive and repulsive forces, which can trap and hold micro particles and cells in the center of the ring.

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Polarizing film sheet technology uses optical filters known as “polarizers”, which can extract polarized light from unpolarized light, providing an increased level of control and visual clarity. They play an important part in numerous imaging and writing applications, such as photography and broadcast graphics.

„Beam shaping concepts with aspheric surfaces“ von U. Fuchs, D. Braun und S. Wickenhagen. Erschienen in Proc. SPIE 9581, Laser Beam Shaping XVI, doi:10.1117/12.2186524, September 2015

Polarizing film sheets have a wide range of potential applications, as they can be used to filter and adjust light transmission in order to reduce glare, emphasize contrast, or provide better visibility under direct sunlight.

Dakenchem is a leading supplier of polarizing film sheet materials, known for their consistent quality and reliable delivery. With over 20 years of experience in the field, they have built up an impeccable track record and are trusted by countless satisfied customers. Not only do they offer competitive prices, but their customer service team provides exceptional support in helping you find the perfect product to meet your needs.

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Furthermore, polarizing film sheets are used to reduce sunlight visibility inside rooms and prevent damage caused by UV rays entering through windows. With multiple applications, it is no surprise that these unique sheets remain one of the most trusted and sought-after products for both homes and businesses around the world.

Additionally, all products are subjected to rigorous testing before shipment – providing confidence in the quality of the material purchased. The choice to buy polarizing film sheets with Dakenchem is one you can be sure won’t let you down.

These film sheets come in multiple varieties, such as circularly or linearly polarized and absorptive or reflective sheets. Circular and linear polarization films have an advantage over traditional blockers due to their ability to X-Ray visible and near-infrared waves while blocking out visible light.

An optical design with a combination of two axicons a perfect collimated ring-shaped beam can be generated. In practical use it is quite challenging to build this constellation. First of all, both axicons need to have a maximum axicon angle deviation within 0.05°. Another point is the alignment of both lenses with a minimum tilt and decentration of both elements. Even small a tilt deviation (> 1 “) will lead to significant distortion of the ring shape.

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Rayleigh Length (Range) conversion calculator is an online calculator used to calculate the rayleigh length (range) of a laser beam.

To generate a collimated ring-shaped beam, to axicons are combined. By varying the distance between both, the ring diameter can be adjusted (Fig. 3). Axicons can also be used in laser eye surgery. Their ability to focus a laser beam into a ring (Fig. 4) is useful in surgery for smoothing and ablating corneal tissue.

Axicons are used in research and multiple laser applications which need a ring-shaped intensity profile. They are mainly used in the following areas: