Other

Michigan State University

Baokang Bi

Jes Asmussen

Brage Golding

Wen-Shin Huang

A pattern generating system for generating two-dimensional images on a surface includes a light source and one or more Zone Plate Modulator (ZPM) arrays. The ZPM arrays comprise diffractive zone plate modulating elements that are capable of either diffracting or reflecting an incident light according to the image data. In a high-resolution pattern generating system, ZPM arrays are used as spot array generators. A complete high-resolution image is formed by scanning individual light spots in the spot array using a subfield scanning means.

Pattern generating systems

A zone plate modulator modulates an incident wave by changing the relative distance between a pair of complementary reflective zone plates. The modulator acts to reflect the incident wave as a plane mirror in a first configuration, and to diffract the incident wave into a series of focal points along the axis of the modulator as a phase zone plate in a second configuration. A force applied to the zone plates changes the zone plate modulator between the first and second configurations, therefore modulating the incident wave. The force can be an electrostatic force generated by a voltage source. An array of zone plate modulator elements is a compact spot array generator performing both the modulating and focusing functions. An achromatic zone plate modulator provides a both wavelength and polarization independent modulation of the incident wave. A variable optical attenuator comprises achromatic zone plate modulators.

Diffractive wave modulating devices

Surface Acoustic Wave (SAW) devices with an unpolished or nominally polished nanocrystalline diamond film, metal electrodes and piezoelectric composition coatings are described. The devices are used as radio frequency and microwave filters.

Growing community of inventors

Okemos, MI, United States of America

Baokang Bi