US 7,924,973 B2 · Interferometer device and method

Abstract

The present invention discloses an interferometer device and method. In embodiments, the device comprises an electromagnetic radiation source emitting radiation having a first mean wavelength λLE; a phase grating having a first aspect ratio; an absorption grating having a second aspect ratio; and a detector. The electromagnetic radiation source, the phase grating, the absorption grating and the detector are radiatively coupled with each other. The absorption grating is positioned between the detector and the phase grating; the electromagnetic radiation source is positioned in front of the source grating; and wherein the phase grating is designed such to cause a phase shift that is smaller than π on the emitted radiation. Additional and alternative embodiments are specified and claimed.

Claims14

Dependent claims

An interferometer device, said device comprising:

an electromagnetic radiation source emitting radiation;
a phase grating having a first aspect ratio and comprising grating bars;
an absorption grating having a second aspect ratio;
and
a detector;
wherein said electromagnetic radiation source, said phase grating, said absorption grating and said detector are radiatively coupled with each other;
wherein said absorption grating is positioned between said detector and said phase grating;
wherein said electromagnetic radiation source is positioned in front of said source grating;
and
wherein said phase grating is designed such to cause on at least one wavelength of radiation passing through the grating bars a phase shift Δφ of less than π relative to radiation passing between the grating bars respective to said at least one wavelength.

7 more elements

Dependencies are inferred from the claim text.

Interferometer device and method

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Interferometer device and method

Life of this patent

Abstract

Claims14