Optical Fiber Spectrum Confocal Measurement Device

Abstract

The invention discloses a fiber spectrum confocal measurement device which comprises the components of a light source which is used for emitting incident light with a plurality of wavelengths and transmitting the incident light to a sampling part through a first optical channel; the sampling part which is used for receiving the incident light emitted from the light source and generating an axial color difference so that the light with the axial color difference is irradiated to a measured object and reflected light that returns from the measured object passes; a measurement part which is used for receiving the reflected light transmitted through a second optical channel, acquiring the information of the measured object and performing analyzing for obtaining a measurement result; fibers which comprise a first fiber and a second fiber; and a housing which is used for placing the light source and / or the measurement part, and furthermore a coupling part is outside the housing. According to the fiber spectrum confocal measurement device, through individually setting the optical channels for the light source and the measurement part, so that the optical paths of the incident light and the reflected light returned from the measured object are independent from each other, thereby eliminating an interface reflection interference formed in the process that light emitted from the light source irradiates into the coupling part and improving measurement precision.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to an optical fiber spectrum confocal measurement device. Background technique [0002] The spectral confocal measurement method uses multi-wavelength light to form a focal zone on the optical axis through dispersion, and one measurement can measure one or more distances along the optical axis. In order to better install the mechanical position or facilitate the modularization of the device, there are many measuring devices with a light source and a measuring part for measuring reflected light that use optical fibers as connecting parts. Then the reflected light is formed on the surface of the measured object and then returns to the measurement part through the original optical path. In order to obtain high-resolution measurement results, it is necessary to use a small-diameter optical fiber to obtain a small measurement spot, so the reflected light carrying measurement informa...

AI Technical Summary

Problems solved by technology

However, the light emitted by the light source 10 will produce interface reflection when passing through the optical fiber connector 70, and the reflected light of this interface will enter the measurement part 30 at the same time as the reflected light carrying measurement information returned from the surface of the measured object 60, forming interference, seriously Affected the measurement accuracy

Although the existing technology uses software to record reflected light and uses offset algorithms to reduce interference, the reflected light at the interface changes every time the optical fiber 50 is plugged in, and it is not reliable to rely solely on software

Especially the wear and scratches on the interface after more than 50 times of plugging and unplugging of optical fibers, as well as the dust and oil brought in by plugging and plugging, the reflected light from the interface can even make the measuring device unable to work normally

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