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Side shaft matter light confocal filtering method for optical coherence tomography and detecting lens

A technology of optical coherence tomography and confocal lens, which is applied in the field of paraxial object light confocal filtering and detection lens group for optical coherence tomography, and can solve the problems of non-filtering, low signal-to-noise ratio, measurement resolution and Problems such as detection depth limitation, to achieve high signal-to-noise ratio, high positioning accuracy, measurement resolution and improved detection depth

Inactive Publication Date: 2009-06-03
ZHEJIANG UNIV
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Problems solved by technology

Although this kind of detection optical path can detect the interference signal of the measured point, it cannot filter the noise in the detection beam composed of the backscattered light of the points other than the measured point inside the measured object and the reflected light on the surface of the measured object, so the system The signal-to-noise ratio is low, and the measurement resolution and detection depth are also greatly limited

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  • Side shaft matter light confocal filtering method for optical coherence tomography and detecting lens
  • Side shaft matter light confocal filtering method for optical coherence tomography and detecting lens

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Embodiment Construction

[0012] refer to figure 1 , the paraxial objective light confocal filter detection lens group used for optical coherence tomography includes a box body 12 with a light hole 13, the center line of the light hole 13 along the center line of the light hole 13 in the box body 12, that is, the main optical axis 14, and A detection objective lens 1, a confocal lens 4, a pinhole filter 5 and a photoelectric converter 11 are sequentially installed on the axis, and the detection objective lens 1, confocal lens 4 and pinhole filter 5 form a confocal filtering optical path; between the detection objective lens 1 and the common One side of the main optical axis 14 of the confocal filtering optical path between the focal lenses 4 is provided with a first plane reflector 2 and a second partial reflector 3 which are inclined at 45° and are parallel to each other, and are parallel to the main optical axis of the confocal filtering optical path. The third plane mirror 6, wherein, one end of the...

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Abstract

This invention discloses the paraxial optical confocal microscopy filtering method and detection mirror group used in optical coherence tomography. Mirror Group detection is constituted of optical confocal optical filter optical axis and adjacent interfered optical combination, which includes two part-routing and three total reflection mirror. The method is characterized by detection of confocal optical filter only in the optical path adjacent to the region to a single axis track road, so the detection objective lens measured in the former focus in the internal, the only focus of the reverse before scattering light can be achieved after the system focus away from the previous focus of the reverse point of the measured surface scattering light and the reflected light are filtering system, which can remove noise tomographic measurement of the main sources of interference signal-to-noise ratio to be greatly enhanced , and the probing depth measurement resolution, but has also improved. The method and detection devices at the core group can make high-performance chromatography interference measuring instrument.

Description

technical field [0001] The invention relates to a filtering method and a detection mirror group device for tomography measurement in optical detection technology. Background technique [0002] Optical coherence tomography is a new type of measurement technology that is developing in the field of optical detection. For various optical coherence tomography methods, the design of the detection optical path system is the core technology, because the measurement object, measurement method and measurement effect of each optical coherence tomography technology mainly depend on the structure and work of the detection optical path system principle. The signal-to-noise ratio is a major factor affecting the measurement results of optical coherence tomography, and the size of the signal-to-noise ratio is closely related to the design of the detection optical path. Most of the existing optical coherence tomography technologies are developed on the basis of optical low coherence tomogra...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/45
Inventor 鲁阳
Owner ZHEJIANG UNIV
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