2022年9月7日 · In photography, moiré happens when the item being photographed contains a detailed pattern that does not play along with the pattern of the imaging sensor. With two separate patterns overlaid on top of each other, a third, false pattern emerges in the form of “moiré pattern”.

2021年2月12日 · With the Moiré lens a laser beam can be variably focused or objects at variable distance can be imaged sharply. By rotating two DOES (Diffractive Optical Element) against each other, the focal length of the lens changes. Our tunable axicons make it easy to create high-quality Bessel-like beams.

THE MOIRE LENS. The MOIRE LENS© is an innovation in the field of focus tunable lenses. It shows some useful advantages compared to other lenses: ready for high power applications; its focal spot stays on optical axis; compact design (thin and lightweight) scalable in size; wavelength and power; diffraction limited resolution (monochromatic light)

Variable Focus Moiré Lenses consist of specially structured cascaded Diffractive Optical Elements (DOEs). These lenses are continuously adjustable over a wide focal length range by simply rotating the elements.

2017年5月9日 · Moiré lenses are cool: two patterned diffractive optical elements are rotated relative to each other to vary the power of the “lens”. Just watch the video (below). Demonstration of focus-tunable diffractive Moiré-lenses Stefan Bernet, Walter Harm, and Monika Ritsch-Marte

2021年11月20日 · Moiré is an optical phenomenon that occurs when two patterns with similar frequencies interact with each other. This interference produces an unwanted pattern that can be visible in digital images, prints, and even textiles. In this article, we’ll take a closer look at what causes moiré, how to avoid it, and how to remove it. What Causes Moiré?

Moiré metalenses are tiny patterned lenses composed of artificial meta-atoms. To keep these metalenses thin and compact enough for their desired uses, such as in MEMS devices, they have a limited focal tuning range.

The surface structure of individual Diffractive Optical Elements of a Variable Focus Moiré Lens are produced by standard photolithography techniques. The resultant pair of elements creates Fresnel zones that can be continuously adjusted to create a continuously variable focal length.

2013年3月25日 · Our experimental investigation shows that the Moiré-lenses have a broad adjustable refractive power range with a high efficiency, which allows one to use them for flexible beam steering and for imaging applications.

The rotationally tunable moiré zone plate is capable of generating an array of equal intensity focal spots with a precisely adjustable axial distance along the propagation direction.