An observation instrument includes a picture capturing device, a terminal connected to the scanner, a first display, a second display, a semi-reflecting mirror and a polaroid glass. The first display and the second display define an angel and display surfaces of them faces eath other. The first and the second display are connected to the terminal. The semi-reflecting mirror is disposed between the display surfaces and extends along an angle bisector of the display surfaces. The polaroid glass include a first lens and a second lens, the first lens allows a perpendicular polarized light passing through only, the second lens allows a horizontal polarized light passing through only. The polaroid glass is employed to observe a picture displaying on the semi-reflecting mirror.一種觀測儀,其包括圖像獲取裝置、與圖像獲取裝置電性連接之處理終端、第一顯示元件、第二顯示元件、半反射鏡以及偏光眼鏡,該第一顯示元件與第二顯示元件均與該處理終端電性連接,該第一顯示元件與該第二顯示元件呈一定角度設置且顯示面相向設置,該半反射鏡設置於第一顯示元件與第二顯示元件之顯示面之間,且處於二者之角平分線上以分別接收該第一顯示元件與第二顯示元件之出射光,該偏光眼鏡包括第一鏡片及第二鏡片,該第一鏡片為垂直偏光片且該第二鏡片為水平偏光片以分別接收從該半反射鏡上出射之垂直偏振光和水平偏振光。100...觀測儀10...圖像獲取裝置20...處理終端40...半反射鏡50...偏光眼鏡31...第一顯示元件33...第二顯示元件41...第一表面43...第二表面51...第一鏡片53...第二鏡片