What are the advantages of Variable Focus Moiré Lenses?

Variable Focus Moiré Lenses feature a pair of specially structured diffractive optical elements, fabricated via standard photolithographic techniques. These lenses also consist of a simpler design and construction than alternative liquid, photo-acoustic, or nanomaterial techniques. The simple construction also makes the Moiré lenses insensitive to changes in temperature and vibration resistant. The plates are also [...]

By |July 17th, 2017|0 Comments

What is the efficiency of Variable Focus Moiré Lenses?

The first order diffraction efficiency n1 of a Moiré lens depends on the chosen twisting angle θ, resulting in the corresponding optical power: n1 = (sinc (θ⁄2))2 (1) The total efficiency is a product of the diffraction efficiency and the transmission efficiency  nt, which is approximately 96%. For a twisting angle of 45º, the [...]

By |July 15th, 2017|0 Comments

How are Variable Focus Moiré Lenses manufactured?

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.

By |July 14th, 2017|0 Comments

What wavelengths are available?

Variable Focus Moiré Lenses can be manufactured for wavelengths from the UV through the IR. The Moiré pattern of the DOEs is required to be designed for a specific wavelength; maximum efficiency is achieved when the structure heights are equal to an integer multiple of the design wavelength (2π phase shift). The limiting factor in [...]

By |July 10th, 2017|0 Comments
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