A bird repellent apparatus having an integral base member and a plurality of prongs. The lens is fastened with the image sensing component through adhesion or by using a fastener. The total internal reflection effect is controlled by a high intensity optical pump beam separate from the optical data signal. Preferably, the head weight 12 is attachable todetachable from the grip cavity body 40. The elastomeric assembly is movable between a first position where the elastomeric assembly can move axial within the aperture and a second position where the elastomeric assembly is prohibited from moving axially within the aperture. The resulting programmable duplexer has an added additional advantage of lessening the temperature variations of the programmable duplexer.