Broadband optics for manipulating light beams and images

Patent metadata

Field	Value
Publication number	US-9715048-B2
Application number	US-201514739240-A
Country	US
Kind code	B2
Filing date	Jun 15, 2015
Priority date	Jan 29, 2010
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

Optical systems for controlling with propagation of light beams in lateral and angular space, and through optical apertures. The light beams include laser beams as well as beams with wide spectrum of wavelengths and large divergence angles. The optical systems are based on combination of diffractive waveplates with diffractive properties that can be controlled with the aid of external stimuli such as electrical fields, temperature, optical beams and mechanical means.

First claim

The invention claimed is:

1. A system for positioning light beams comprising:
(a) A light source irradiating a light beam;
(b) a plurality of diffractive waveplates configured to receive and diffract the light beam;
(c) means for independently controlling one or more diffractive properties of one or more of the plurality of diffractive waveplates.

2. The system of claim 1 further comprising means for shaping the light beam via controlling one or more of divergence, spectral content, polarization and profile.

3. The system of claim 1 wherein the plurality of diffractive waveplates comprises at least one pair of optically identical diffractive waveplates.

4. The system as in claim 1 wherein the means for independently controlling one or more diffractive properties of one or more of the plurality of diffractive waveplates comprises varying one or more of electric field, magnetic field, optical radiation, temperature and mechanical stress.

5. The system of claim 4 wherein the plurality of diffractive waveplates is deposited on a single substrate.

6. The system of claim 1 wherein the means for independently controlling one or more diffractive properties of one or more of the plurality of diffractive waveplates comprises varying one or more of temperature, mechanical rotation assembly and mechanical displacement assembly.

7. The system of claim 1 wherein the light beam is produced by a laser source with quasi-monochromatic spectrum.

8. The system of claim 1 wherein the light beam is produced by a source with broadband angular spectrum.

9. The system of claim 1 wherein the diffractive waveplates deflect light with nearly 100% efficiency in a broad spectrum of wavelengths.

10. The system of claim 8 wherein the light beam is produced by a source with broadband wavelength spectrum.

11. The system of claim 1 further comprising an optical setup for receiving and controlling light irradiated by the light source and emanating at the output of the plurality of diffractive waveplates, said optical setup including one or more of spatial filters, spectral filters, polarizers and diffraction gratings.

Assignees

• Us Army
• Beam Eng For Advanced Measurements Co

Inventors

• Tabirian Nelson V
• Nersisyan Sarik R
• Kimball Brian R
• Steeves Diane M

Classifications

• G02B27/44

  Grating systems; Zone plate systems (G02B27/46 takes precedence) · CPC title

• G02B5/1866

  Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials (G02B5/1809, G02B5/1828, G02B5/1833, G02B5/1838 and G02B5/1847 take precedence) · CPC title

• G02B27/4272

  having plural diffractive elements positioned sequentially along the optical path · CPC title

• G02B5/1828 Primary

  having means for producing variable diffraction (controlling the direction of light by means of one or more diffracting elements G02B26/0808; acousto-optical elements G02F1/11, G02F1/33; electro- or magneto-optical diffraction G02F1/292, G02F1/2955) · CPC title

• G02B27/425

  in illumination systems (mask illumination systems in photolithographic systems G03F7/70158) · CPC title