High-throughput sagnac interferometric imaging spectroscopy device

Abstract

The invention discloses a high-flux Sagnac interference imaging spectrum apparatus, which comprises a front imaging object lens, a collimating object lens, a Sagnac interferometer, a half-wave plate, a combination polarization analyzer, a rear imaging object lens and a detector. The front imaging object lens, the collimating object lens and the Sagnac interferometer are sequentially arranged along the same optical axis, and the optical axis of the above optical elements is a first optical axis. The half-wave plate, the combination polarization analyzer, the rear imaging object lens and the detector are arranged in sequence along the same optical axis, and the optical axis of the optical elements is a second optical axis. The first optical axis is perpendicular to the second optical axis. Light beams split by the Sagnac interferometer enter the half-wave plate. All the optical elements have the same height coaxially relative to an apparatus pedestal. Compared with conventional same-optical-path interference imaging spectrum systems, the high-flux Sagnac interference imaging spectrum apparatus has the advantage that luminous flux is increased from less than 50% to more than 80%. Moreover, lamination of interference information helps to increase the signal to noise ratio of a system, and the spectrum recovery precision can be improved.

Description

technical field [0001] The invention relates to the field of optical target detection, in particular to a high-throughput Sagnac interference imaging spectrum device. Background technique [0002] Interferometric hyperspectral imaging technology obtains the interference light intensity information of the imaging target by adding an interferometer to the imaging system, and uses Fourier transform to restore the spectral data cube of the imaging target. It has high luminous flux, high spatial resolution and high spectral resolution. It has great application potential in remote sensing imaging, resource exploration, environmental monitoring and other fields. [0003] In recent years, this kind of hyperspectral imaging technology has been studied at home and abroad. Among them, Israel Cabib and others studied the high-throughput interference imaging spectroscopy technology based on the Sagnac interferometer, and formed interference signals on the detector through the idea of ​​...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-throughput Sagnac interference imaging spectroscopy device and method to solve the technical problem of large luminous flux loss in the traditional Sagnac interference imaging spectroscopy technical scheme

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