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A Parallel Imaging Probe with Fine Spectral Encoding Based on Virtual Image Phased Array

A phased array, imaging probe technology, applied in the field of optical endoscopy, to achieve the effects of simple design, improved imaging quality, and high total pixel count

Active Publication Date: 2022-03-11
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • A Parallel Imaging Probe with Fine Spectral Encoding Based on Virtual Image Phased Array
  • A Parallel Imaging Probe with Fine Spectral Encoding Based on Virtual Image Phased Array
  • A Parallel Imaging Probe with Fine Spectral Encoding Based on Virtual Image Phased Array

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Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited thereto.

[0044] A clinical endoscopic probe that meets the following technical indicators:

[0045] 1. The working wavelength covers the visible light range of 400-800nm, and the central wavelength is 550-650nm;

[0046] 2. The diameter of the bare probe (before packaging) is less than 1mm;

[0047] 3. The length of the hard end of the probe is less than 7mm;

[0048] 4. The number of effective pixels in the linear field of view 8 of the probe is greater than 200, or the number of pixels in the circular field of view 9 is greater than 160,000;

[0049] 5. The field of view or FAR of the probe is greater than 20 degrees;

[0050] The schematic diagram of the probe is as figure 1 , Figure 4 shown. Among them, SMF1 is the 630-HP optical fiber of Nufern Company, which is suitable for transmitting visible lig...

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Abstract

The invention discloses a parallel imaging probe based on fine spectral coding of a virtual image phased array. Composed of a rotating illumination probe and a fixed collection channel, the illumination probe uses VIPA with high spectral resolution and narrow free spectral range as a dispersive element to spatially encode the outgoing beam and form a spectrum in the one-dimensional direction of the sample space The fine structure is different from each other but the spectral range is still equivalent to the spectral comb of incident white light. Driven by an external motor to rotate the illumination probe around the axis of the probe, a two-dimensional circular field of view can be formed. The light scattered or reflected from the sample is conducted to the fine spectral detection device by a fixed collection channel. The VIPA-based spatial encoding of the present invention can not only realize parallel imaging in one-dimensional direction, but also retain the wide spectral characteristics of the original incident white light in its fine spectrum, which can ensure the color imaging of the optical endoscope, so it has great advantages. potential for clinical application.

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 (virtual image phase array, VIPA) for fine spectrum encoding. [0002] technical background [0003] Endoscopes provide doctors with intuitive optical images of the interior of the human body, featuring low damage and high resolution, and are therefore widely used to observe and diagnose lesions in tissues or organs such as the digestive tract, reproductive tract, and respiratory tract. The earliest endoscopy can be traced back to 60 years ago [1]. Hirschowitz et al. developed a clinical endoscopy model using a coherent fiber bundle (CFB) and performed an examination of the upper gastrointestinal tract. This kind of endoscope that 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B1/00A61B1/05A61B1/07
CPCA61B1/00163A61B1/05A61B1/07A61B1/00096A61B1/00172A61B1/0605
Inventor 丁志华章程邱建榕
Owner ZHEJIANG UNIV
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