An objective lens assembly comprising: a first anamorphic lens group positioned to receive visible light along an optical path and including a first optical sub-group and a second optical sub-group, the first optical sub-group including at least a first pair of crossed cylindrical lenses comprising a first cylindrical lens and a second cylindrical lens, and the second optical sub-group including at least a first spherical lens, wherein the first optical sub-group is configured to provide a first focal power having a same sign focal power in a first dimension and a second dimension substantially orthogonal to the first dimension, and the second optical sub-group is configured to provide a second focal power having a same sign focal power in the first dimension and the second dimension and opposite the sign focal power of the first focal power; a second anamorphic lens group positioned along the optical path to receive the visible light from the first anamorphic lens group and including a third optical sub-group and a fourth optical sub-group, the third optical sub-group including at least a second spherical lens, and the fourth optical sub-group including at least a second pair of crossed cylindrical lenses comprising a third cylindrical lens and a fourth cylindrical lens, wherein the third optical sub-group is configured to provide a third focal power having a same sign focal power in the first dimension and the second dimension and opposite the sign focal power of the second focal power, and the fourth optical sub-group is configured to provide a different sign focal power in the first dimension from the second dimension; and an aperture stop centered along the optical path and interposed between the first anamorphic lens group and the second anamorphic lens group, and wherein the second optical sub-group comprises a fifth cylindrical lens positioned along the optical path to receive the visible light from the first spherical lens. a first anamorphic lens group positioned to receive visible light along an optical path and including a first optical sub-group and a second optical sub-group, the first optical sub-group including at least a first pair of crossed cylindrical lenses comprising a first cylindrical lens and a second cylindrical lens, and the second optical sub-group including at least a first spherical lens, wherein the first optical sub-group is configured to provide a first focal power having a same sign focal power in a first dimension and a second dimension substantially orthogonal to the first dimension, and the second optical sub-group is configured to provide a second focal power having a same sign focal power in the first dimension and the second dimension and opposite the sign focal power of the first focal power; a second anamorphic lens group positioned along the optical path to receive the visible light from the first anamorphic lens group and including a third optical sub-group and a fourth optical sub-group, the third optical sub-group including at least a second spherical lens, and the fourth optical sub-group including at least a second pair of crossed cylindrical lenses comprising a third cylindrical lens and a fourth cylindrical lens, wherein the third optical sub-group is configured to provide a third focal power having a same sign focal power in the first dimension and the second dimension and opposite the sign focal power of the second focal power, and the fourth optical sub-group is configured to provide a different sign focal power in the first dimension from the second dimension; and an aperture stop centered along the optical path and interposed between the first anamorphic lens group and the second anamorphic lens group, and wherein the second optical sub-group comprises a fifth cylindrical lens positioned along the optical path to receive the visible light from the first spherical lens.