Patent ID: 9404801
Filing Date: 2016-08-02
CPC Classification: G01J,G01N

Claim Text:
1. A heterodyne detection system for detecting light, comprising: a first input aperture configured to receive first light from a scene input; a second input aperture configured to receive second light from a local oscillator input; a broadband local oscillator configured to provide the second light to the second input aperture; a dispersive element configured to disperse the first light and the second light; and a final condensing lens coupled to an infrared detector, wherein the final condensing lens is configured to concentrate incident light from a primary condensing lens onto the infrared detector, wherein the infrared detector is a square-law detector configured to sense a frequency difference between the first light and the second light; and wherein each area of the first and second input apertures times an input collection solid angle of the system is about a wavelength squared (about λ