分析和研究了光纖光斑尺寸、透鏡的數(shù)值孔徑、放大倍率、光纖與透鏡的匹配及裝配等對(duì)自聚焦共焦光纖傳感軸向分辨率的影響。指出, 為使系統(tǒng)獲得較高的軸向分辨率, 需控制與光纖光斑尺寸有關(guān)的參數(shù)A ≤3, 選用大放大倍率的自聚焦透鏡, 并使透鏡的數(shù)值孔徑小于光纖數(shù)值孔徑, 同時(shí)要保證透鏡與光纖間的精密裝配。
關(guān)鍵詞: 光纖共焦顯微技術(shù); 光纖傳感器; 自聚焦透鏡; 軸向分辨率

Abstract: The effect parameters, such as fiber2op t ical spo t size, the numerical aperture and magnificat ion of a gradient2index lens,match and assembly betw een a gradient2index lens and the fiber on axial reso lu2 t ion of the fiber2op t ical confocalm icro scope. It is po inted that, in o rder to obtain h igh axial reso lut ion, parameter A related to fiber2op t ical spo t should be less than 3, the h igh magnificat ion gradient2index lens should be selected, the numerical aperture a gradient2index lens should less than that of a fiber, and p recision assembly betw een a gradient2index lens and the fiber should be abtained.
Key words: F iber2op t ical confocalm icro scope; F iber2op t ical senso r; Gradient2index lens; A xial reso lu2 t ion