A biometric identification apparatus including a light guide device having a first surface and a second surface opposite to each other, optical micro structures formed on the second surface, a light source used to emitted a light beam and an image capture device disposed opposite to the second surface of the light guide device is provided. Each of the optical micro structures has at least one reflective surface. The light beam is reflected by the at least one reflective surface of each of the optical micro structures to be collimatedly transmitted toward the first surface of the light guide device.一種生物辨識裝置,包括具有相對的第一、二表面的導光元件、形成於第二表面的多個光學微結構、用以發出光束的光源以及相對於導光元件的第二表面設置的影像擷取元件。每一光學微結構具有至少一反射面。光束被每一光學微結構的反射面反射,以準直地向導光元件的第一表面傳遞。10‧‧‧待辨識物100‧‧‧生物辨識裝置110‧‧‧導光元件112‧‧‧第一表面113‧‧‧凹槽114‧‧‧第二表面116‧‧‧外側壁118‧‧‧內側壁119‧‧‧底面119a‧‧‧凹陷120‧‧‧光學微結構122‧‧‧第一反射面124‧‧‧第二反射面130‧‧‧光源140‧‧‧影像擷取元件142‧‧‧像素區150‧‧‧電路板160‧‧‧透光元件162‧‧‧按壓面170‧‧‧第一光學膠180‧‧‧準直元件184‧‧‧透光區190‧‧‧第二光學膠L‧‧‧光束
