In some cases, the phenomenon of surface tension is used for obtaining smooth and repeatable lens surface shapes. The resulting surface is then generally non-spherical, and not necessarily ideal with respect to optical aberrations.

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Further, we have many interesting case studies on the same page, with topics mostly in fiber optics. Concrete examples cases, investigated quantatively, often give you much more insight!

Microlens arrays (or micro-lens arrays) are one- or two-dimensional arrays of microlenses, i.e., rather small lenses (lenslets). In most cases, the lenslets form a periodic pattern either of square or hexagonal type, where the lens pitch is a few hundred micrometers, some tens of micrometers or even less.

Different optical materials can be used, such as fused silica, various other glasses or plastics (polymer materials). The choice of material must fit to the chosen production technique, but also has effects on various device properties, e.g. the usable spectral range and the mechanical and thermal stability.

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Linear Polarizers transmit a linear polarized beam by absorbing or reflecting parts of the incoming light that are not polarized in ...

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PowerPhotonic design and manufacture standard and custom micro lens arrays in 1D and 2D arrays. All products are manufactured out of high-grade fused silica and capable of both high efficiency and high power handling. Lenses can be spheric, aspheric or freeform due to our unique manufacturing process.

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Using our Nanoscribe Quantum X align tool, we can 3D print optical and mechanical microstructures directly onto surfaces such as fiber cores or photonic integrated circuits (PICs). This high-precision additive manufacturing process for microstructures is based on two-photon polymerization (2PP), in combination with state-of-the-art alignment technology. It enables a feature size down to 100 nanometers, with optical grade surface quality free from slicing steps. This allows full control over the optical properties of the printed optics. Not only can lenses be designed to focus or collimate light, but they can even take on aspherical shapes in order to correct for optical aberrations.

Holographix designs and produces cost-effective, high quality custom microlens arrays (MLAs) to customer specifications. We manufacture a wide range of polymer-on-glass MLAs using our proprietary UV replication technology. Our master molds are produced using a variety of mastering techniques, allowing us to offer replicated MLAs with a wide selection of possible lens profiles, packing configurations, sizes, and tolerances. We offer replicas in a range of refractive indices that are solder reflow compatible. Our manufacturing process and equipment allow us to produce precisely aligned single and double-sided MLAs with accurate polymer thickness and flatness control. We also offer wafer-level processing for customers that require high volume scalability.

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One can also apply methods of laser material processing, forming only one lenslet at a time or possibly some number of them, using multiple processing beams. Such methods provide substantial versatility and flexibility, but are generally slow and expensive.

360-degree cameras work by capturing an entire panoramic view in a single instant. Standard cameras, like the one on your smartphone, typically have a field-of ...

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The outer transverse shape is usually a square (e.g. 10 mm × 10 mm), or possibly a rectangle or circle. The number of microlenses can be thousands, possibly many thousands or even millions.

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Microlens arrays are available as separate optical components. Some of them are provided in mounted form, i.e., surrounded by some metal or polymer part which fits into standard optical mounts. The lenses are often equipped with anti-reflection coatings on both sides. Sometimes, the lenses are realized as a thin transparent structured layer contacted to a flat homogeneous glass or semiconductor substrate.

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2024926 — LED lenses, or the caps at the top of them that are visible on the HMI, can take multiple shapes. Each one has its own benefits for the ...

Microlens arrays are rigid arrangements of very tiny lenses, each with a diameter of less than 10 mm. They are precision polished to very high tolerances, so that they can be mounted into complex imaging systems. Specifications • Diameter: +0, -0.1mm • Surface accuracy: λ/2 @633nm or better • Thickness: ±0.2mm • Centration: ±0.04mm • Surface quality:20-10 • Bevel: 0.2mm typical • Material: SK2; BK7 and more

Shanghai Optics Inc custom micro-lenses are made from high index optical glass. They are precision polished to very high tolerances, so that they can be mounted into complex imaging systems.

There are also microlens arrays which are part of a larger assembly. For example, some CCD and CMOS image sensors contain one microlens per photodetector for increasing the light collection efficiency: all incident light should be concentrated to the active areas, which cover only part of the chip area.

by SR Tsai · 2017 · Cited by 501 — Infrared (IR) radiation is electromagnetic radiation with wavelengths between 760nm and 100000nm. Low-level light therapy (LLLT) or photobiomodulation (PBM) ...

Lens arrays are usually produced with a micro-fabrication method which forms all microlenses in a single production step. For example, one may employ a photolithographic method, where the lens pattern is defined by a photolithographic mask, which can be of grayscale or binary type. (Partially, one uses techniques which are common in semiconductor processing technology, and are called wafer level optics.) Particularly in the area of plastic optics, one applies mechanical techniques such as molding, e.g. of epoxy materials.