Parallel imaging probe based on fine spectral coding of virtual image phased array

Abstract

The invention discloses a parallel imaging probe based on fine spectral coding of a virtual image phased array. The parallel imaging probe is composed of a rotary illumination probe and a fixed collection channel, the illumination probe uses a VIPA with high spectral resolution and a narrow free spectral range as a dispersion element to perform spatial coding on an emergent light beam, and a spectral comb with different spectral fine structures but with a spectral range still equal to that of incident white light is formed in the one-dimensional direction of the sample space. The illuminationprobe is driven by an external motor to rotate around the axis of the probe, so that a two-dimensional circular view field is formed. Light scattered or reflected from the sample is conducted by the fixed collection channel to a fine spectral detection device. According to the spatial coding based on the VIPA, parallel imaging in the one-dimensional direction can be achieved, the fine spectrum ofthe spatial coding still keeps the wide spectrum characteristic of the original incident white light, color imaging of an optical endoscope can be ensured, and therefore great clinical application potential is achieved.

Description

technical field [0001] The invention belongs to the field of optical endoscopy, in particular to a parallel imaging probe using a virtual image phase array (VIPA) for fine spectrum encoding. [0002] technical background [0003] Endoscopy provides doctors with intuitive optical images of the inside of the human body. It has the characteristics of low damage and high resolution, so it is widely used to observe and diagnose lesions in tissues or organs such as the digestive tract, reproductive tract, and respiratory tract. The earliest endoscope can be traced back to 60 years ago [1]. Hirschowitz et al. developed a clinical endoscope model using a coherent fiber bundle (CFB) and performed an examination of the upper gastrointestinal tract. This kind of endoscope, which uses CFB light guide at the far end and charge-coupled device (CCD) or complementary metal oxide semiconductor (complementary metal oxide semiconductor (CMOS)) detection at the proximal end, has a certain degree...

AI Technical Summary

Problems solved by technology

Unlike diffraction gratings, VIPA uses the principle of multi-beam interference and has high spectral resolution, but its free spectral range (FSR) is very narrow.

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