Patent ID: 9664563
Date: 2017-05-30
CPC Classifications: G01J

Claim:
1. A Fourier transform spectrometer, comprising: a Fabry-Perot interferometer to create a spatial domain interference pattern using input light; a detector positioned with respect to the Fabry-Perot interferometer to capture an image of the spatial domain interference pattern, the detector comprising a plurality of detection elements, and defining an optical axis that is orthogonal to the detector; and a processor that is communicatively coupled to the detector, the processor being configured to process the spatial domain interference pattern image using a frequency domain transform to determine information about the spectral content of the light, wherein the Fabry-Perot interferometer comprises first and second optical surfaces that are partially transmissive and partially reflective to the light, the first and second optical surfaces defining a resonant cavity therebetween, the distance between the first and second optical surfaces being spatially variable in a first transverse direction that is orthogonal to the optical axis, and the first and second optical surfaces having a reflectance in the range of 20-60%.