The invention describes a device (1) and a method (100) for bio metric identification of an object with a significantly improved signal-to-noise ratio. The device comprises an optical image sensor element (11) at least sensitive to an infrared spectrum to take at least one picture (112) of the object (2) under ambient light conditions (ALC) with additional infrared light conditions (ILC), an infrared light source (12) to provide additional infrared light (IR) for the infrared light conditions (ILC), and a processing unit (13) to provide an image or image code (131) for the bio metric identification obtained from the picture (112), where the infrared light source (12) emits a narrow infrared light spectrum with a peak wavelength (121) between 925 nm to 955 nm and with a full width of half maximum of less than 5 nm, and where an infrared bandpass filter (14) is arranged in the light path (LP) between the object (2) and a sensor array of the optical image sensor element (11) having a transmission window (141) between 925 nm and 955 nm covering at least the peak wavelength (121) of the infrared light source (12).