Patent ID: 7661594

Claim:
A discrete optical correlation system including an adjustable aperture comprising: an optical illumination system including an elongated transparent member coupled to a portable illumination system, wherein the portable illumination system further includes an on state and an off state, and wherein the portable illumination system transmits an optical illumination output in the on state, and wherein the optical illumination output is transmitted through the elongated transparent member; a first optically opaque sleeve slidably coupled over the elongated transparent member partially covering an exposed transparent surface of the elongated transparent member, wherein the first optically opaque sleeve includes a first and second end, and wherein a concave curved cutout is disposed on the second end; and a second optically opaque region disposed on the elongated transparent member partially obstructing the exposed transparent surface of the elongated transparent member, wherein the first optically opaque sleeve is slidably disposed over the second optically opaque region creating an exposed transparent region of the elongated transparent member between the concave curved cutout of the first optically opaque sleeve and the second optically opaque region, wherein the optical illumination output is externally transmitted through the exposed transparent region.