The disclosed apparatus may include a planar substrate including a first dimension, a second dimension perpendicular to the first dimension, and a thickness perpendicular to a plane defined by the first dimension and the second dimension. The planar substrate may include material that is transparent to at least one wavelength band of visible light and at least one wavelength band of infrared light. The apparatus may also include a plurality of reflective segments embedded in the planar substrate and distributed along the plane. The face of each reflective segment may be oblique to the plane. In addition, the reflective segments may be transparent to the wavelength band of visible light and at least partially reflective to the wavelength band of infrared light. Various other systems and methods are also disclosed.