Time of flight (TOF) sensor with transmit optic providing for reduced parallax effect

A time of flight (TOF) sensor, comprising:

• a transmit integrated circuit including a light source configured to generate a beam of light;
• a receive integrated circuit including a first photosensor;
• and
• a transmit optic mounted over the transmit integrated circuit and the receive integrated circuit, said transmit optic formed by a prismatic light guide, wherein said prismatic light guide comprises:
• a collimating lens that receives the beam of light;
• an annular body region surrounding a central opening which is aligned with the first photosensor, the annular body region including a first reflective surface defining the central opening and configured to internally reflect the received beam of light;
• and
• a light output surface surrounding the central opening in a ring-shape and configured to output light in response to the internally reflected received beam of light;
• a light pipe mounted within the central opening, said light pipe having a bore aligned with the first photosensor;
• wherein an outer surface of the light pipe is conical in shape and wherein the first reflective surface defining the central opening is conical in shape;
• and
• wherein reflected light from an object illuminated by said output light propagates through the bore of said light pipe to the first photosensor.