FN14720_STELLA-FRESNEL Optoelectronics

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FN14720 STELLA-FRESNEL lenses have become widely used in many application fields. It is a Fresnel lens, with precision engineered grooves to reduce the size and weight of the lens while still providing high-quality imaging and performance. Unlike other types of lenses, with Fresnel lenses, fewer optical elements are needed to give the same optical performance as a conventional spherical lens.

The middle part of the lens is usually made of polycarbonate, a strong and lightweight material, and typically comprises two pieces with grooves or rings made into the surfaces. The grooves are small and steeply-sloped which creating a Fresnel pattern on the surface. The outside of the lens is also made from a hard material such as plastic or glass, but it usually has no grooves as the grooves in the central material already provide the needed focusing effect.

The most common application for FN14720 STELLA-FRESNEL lenses is for optical projection in scientific and optical applications. The Fresnel lens design allows light to be directed from a source, such as an LED or laser, with a high degree of accuracy. This means that the projected image is bright and sharp, and can be used to display an image on a large surface. The ability to accurately direct light also makes Fresnel lenses useful in a range of other diverse applications, such as displays, medical imaging, industrial inspection, and virtual reality.

The FN14720 STELLA-FRESNEL lenses typically feature a high numerical aperture that can reach up to 0.7. This provides a large field of view and a wide acceptance angle for incoming light, allowing it to be used with multiple sources. Additionally, the lenses are designed to be highly tolerant of chromatic and spherical aberration, which are a common source of image distortion in conventional lenses.

The operation of the FN14720 STELLA-FRESNEL lenses is based on the concept of a phase Fresnel lens. This is an optical element which consists of a series of concentric circles with radii that increase progressively from the center of the lens to the edge. Each circle is etched with a specific periodic pattern or shape, such as concentric grooves, which diffract the incident light into a designed outcome.

This diffraction of light creates a wavefront of light that is redirected either outwards or inwards, depending on its orientation. This wavefront is used to focus or defocus the light. For example, if the lens is designed to focus, then the propagation angle of the light is reduced as it passes through the lens, resulting in a concentrated, focused image. Similarly, defocusing lenses create a scattering of light, making them suitable for illumination or imaging applications.

The FN14720 STELLA-FRESNEL lenses have a high degree of accuracy and provide a wide acceptance angle and a large field of view. Additionally, their low weight and size makes them ideal for many applications. These features give the lens the ability to accurately direct light from any source and also make it suitable for providing high-quality images in scientific and optical applications.

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