Based on tLe study of Ref.[1], a structural model of fiber--optic faceplate is establishedin this paper. By means of mode coupling theory and optical information theory, the trans-mission mechanism of faceplate is dis...Based on tLe study of Ref.[1], a structural model of fiber--optic faceplate is establishedin this paper. By means of mode coupling theory and optical information theory, the trans-mission mechanism of faceplate is discussed and the expression of optical information con-tent is obtained. When the maximum information content is transferred in faceplate, theoptimal structural and diffused parameters are given finally.展开更多
An elementary fiber in fiber-optic faceplate serves as a channel for transferring the optical information. The propagation characteristics of an elementary fiber hasagreat effect on the transfer of the maximum informa...An elementary fiber in fiber-optic faceplate serves as a channel for transferring the optical information. The propagation characteristics of an elementary fiber hasagreat effect on the transfer of the maximum information content. A physical model of an elementary fiber with the diffused type, a 3-layer structure fiber, is set up. The concept of the "interim-layer mode" is introduced, and the eigenequation of guided-mode transmission and interim-layer mode transmission has also been deduced. The expressions of transmissive efficiency and crosstalk are defined. According to some low-order modes, in different cases of diffusion and structural design parameters, the transmissive efficiency is calculated. Results show that the existence of the diffused interim layer is the main factor that affects the efficient transmission in fiber and causes crosstalk.展开更多
In this paper, an improved adaptive watershed segmentation method is proposed based on the characteristics of the optical fiber faceplate Firstly, median filtering and morphological contrast enhancement are performed ...In this paper, an improved adaptive watershed segmentation method is proposed based on the characteristics of the optical fiber faceplate Firstly, median filtering and morphological contrast enhancement are performed on the defect images, and then the gradient of the image is obtained by multi-scale morphology. In the improved watershed algorithm, the local minimum is first removed which the depth is lower than H. Then, the local minimum of the depth larger than H as the seed point are extended. Finally, the gradient image is modified by the forced minimum method. The modified gradient image is used to make the watershed Segmentation to get the final segmentation result. The experimental results show that the method can effectively suppress the over-segmentation, and the defects can be extracted well.展开更多
文摘Based on tLe study of Ref.[1], a structural model of fiber--optic faceplate is establishedin this paper. By means of mode coupling theory and optical information theory, the trans-mission mechanism of faceplate is discussed and the expression of optical information con-tent is obtained. When the maximum information content is transferred in faceplate, theoptimal structural and diffused parameters are given finally.
文摘An elementary fiber in fiber-optic faceplate serves as a channel for transferring the optical information. The propagation characteristics of an elementary fiber hasagreat effect on the transfer of the maximum information content. A physical model of an elementary fiber with the diffused type, a 3-layer structure fiber, is set up. The concept of the "interim-layer mode" is introduced, and the eigenequation of guided-mode transmission and interim-layer mode transmission has also been deduced. The expressions of transmissive efficiency and crosstalk are defined. According to some low-order modes, in different cases of diffusion and structural design parameters, the transmissive efficiency is calculated. Results show that the existence of the diffused interim layer is the main factor that affects the efficient transmission in fiber and causes crosstalk.
文摘In this paper, an improved adaptive watershed segmentation method is proposed based on the characteristics of the optical fiber faceplate Firstly, median filtering and morphological contrast enhancement are performed on the defect images, and then the gradient of the image is obtained by multi-scale morphology. In the improved watershed algorithm, the local minimum is first removed which the depth is lower than H. Then, the local minimum of the depth larger than H as the seed point are extended. Finally, the gradient image is modified by the forced minimum method. The modified gradient image is used to make the watershed Segmentation to get the final segmentation result. The experimental results show that the method can effectively suppress the over-segmentation, and the defects can be extracted well.
