Polarization dark field self-adaptation optical retina imager

Abstract

A polarization dark field self-adaptation optical retina imager comprises a light source, an optical system, a polarization dark field achieving device, a self-adaptation optical device and a computer. Light emitted by the light source becomes parallel light after being collimated by a lighting objective lens, the parallel light forms linearly polarized light after passing through a polarizer, and the linearly polarized light shines the fundus retina through a human eye optical system. Light reflected by the retina directly and weak diffused light still keep the polarization state of incident light, and the light beam is not changed in a polarization state after passing through a light beam matching system, a deformation reflecting lens (11) and a light beam matching system (12) and enters an imaging light path. Due to the fact that a polarization shaft of a polarization analyzer is perpendicular to a polarization shaft of the polarizer, the light beam is filtered by the polarization analyzer and can not participate in imaging. Due to the fact that the light beam is in a free polarization state, the light beam can participate in imaging through the polarization analyzer. Dark field imaging is achieved through a polarization method, and the contrast ratio of a retina image is improved compared with the prior art.

Description

technical field [0001] The invention relates to a polarized dark field adaptive optics retinal imager. Background technique [0002] Eyes are the windows to the soul. More than 80% of the external information obtained by people relies on eyes to obtain. Everyone desires to have a pair of bright and healthy eyes. However, in reality, the number of people suffering from eye diseases is quite large, and there are still signs of rising, which has attracted more and more people's attention. From a medical professional point of view, except for ocular trauma and refractive errors, most eye diseases actually originate from the retina of the fundus. When there is a problem with the fundus, it will show abnormal shape or color clinically (such as swelling, edema, hole, atrophy, spots or color circles, exudates, etc.). On the other hand, the human eye is a part of the whole human body, and eye lesions may also come from other problems in the body. Medical research and clinical stud...

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Problems solved by technology

However, the above studies are limited to in vitro ophthalmic experiments and cannot be applied to live human retinal imaging.

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