Disclosed is an optical needle comprising a needle body, a light coupler and an optical fiber. The needle body comprises a cavity to accommodate a portion of the optical fiber. The light coupler provides a coupling interface to couple a light source. An end of the needle body is aligned with the coupling interface, so to align an end of the optical fiber with the coupling interface. The optical needle is characterized in that the long axis of the optical reduces from an end aligned with the coupling interface to an end adjacent to the needle body. The coupling interface may be provided in a slot to accommodate the light source. The optical needle may associate a light source. A method for preparation of the optical needle is also disclosed.本發明提出一種光學針，包括一針體、一光源耦合座及一光纖；該針體具有一空腔，用以容納該光纖的一部分；該光源耦合座提供一介接面，用以介接一光源；該針體一端對準該光源耦合座的介接面，以將該光纖的一端對準該介接面；其特徵在於，該光纖之長軸由該對準該介接面的光源端向該針體端縮減。該介接面可包括在一凹槽內，該凹槽可容納該光源。光學針可結合一雷射光源。本發明也提供該光學針的製作方法。
