Light sensor

An apparatus comprising:

• a light source including a plurality of elements for generating light;
• a body:
• having a planar base, the planar base being orientated perpendicular to a receiving axis, defining a sampling aperture communicating with the planar base and through which the receiving axis passes, encompasses the elements, and adapted, in combination with the light source and when the sampling aperture is blocked to ambient light, to shield a sensor from ambient light;
• and
• a light manipulation apparatus for manipulating the light of the elements through internal reflection, absorption and filtration into light collimated to impinge upon the planar base, at an intersection of the planar base and the receiving axis, at a predetermined angle to the receiving axis,
• wherein the light manipulation apparatus includes a waveguide,
• wherein the body includes, for each of the elements, a respective ray blocker, the ray blockers being disposed in a ring, in a spaced-relation to one another, and adjacent to an edge of the waveguide,
• wherein, from a point of view along the receiving axis, the elements and the ray blockers are disposed in circumferentially alternating relation.