Optical readout method utilizing fiber optics bundle to carry out modulation

Abstract

The invention discloses an optical readout method utilizing a fiber optics bundle to carrying out modulation, belonging to an application of fiber optics in the technical field of optical readout type infrared focal plane thermal imaging, and solving the problem of filtering difficulty due to inconsistent zero-order spectrums caused by different initial attitudes of the imaging units of the optical readout type infrared focal plane array. The scheme can replace a knife edge (or an aperture) to carry out optical filtering; and meanwhile, stray light generated due to limited environment conditions has better inhibitory action, thereby improving the quality of output images. The main process is as follows: ray is transmitted in fiber according to the total reflection principle; the fiber has rigid requirement on the incidence angle of the ray, thus the ray (such as the stray light in environment) which does not satisfy the incidence angle can not be totally reflected in the fiber but is refracted into a cladding, i.e. the fiber optics bundle can not transmit the ray, thereby inhibiting the stray light; and the ray (such as beam expanding collimation light source) satisfying the incidence angle can be transmitted to the rear end surface of the fiber optics bundle by means of the total reflection principle. When a focal plane array arranged on the rear end surface deflects because of being heated so as to change the angle of the ray entering the fiber from the end surface, thus the angle of the ray emitted from the front end surface also changes; and luminous energy received from an optical receiver changes and is embodied by the light and shade change on the image.

Description

technical field The invention is an optical readout processing technology of an optical readout infrared focal plane array thermal imaging system, which can replace a knife edge or a small hole to filter the system, which simplifies the structure of the system; and the stray light in the environment It has a significant inhibitory effect, so that the subsequent image processing process can obtain better results and improve image quality. Background technique In recent years, with the continuous advancement of science and technology, the uncooled infrared thermal imaging system has achieved rapid development, and gradually formed the following readout methods: ①Electrical readout method: convert infrared radiation energy into the detection unit on the focal plane The thermal energy, the local temperature change causes the change of the measurable physical parameters of the focal plane detection unit, such as the change of electrical impedance, and then the electrical signal f...

AI Technical Summary

Problems solved by technology

But at present, this technology is not mature enough, and there is still a certain distance from commercialization, and it is still in the experimental research stage.

Images