An alignment apparatus for aligning components of an optical assembly , the alignment apparatus comprising: a chuck configured to support the optical assembly thereon; and an adjustable flexure assembly disposed around the chuck , the adjustable flexure assembly comprising a plurality of flexures , wherein: the plurality of flexures are positioned relative to the chuck such that each of the plurality of flexures contact the optical assembly when the optical assembly is positioned on the chuck ; and adjustment of a position of one or more flexures of the plurality of flexures adjusts an alignment of an optical axis of an optical component of the optical assembly when the optical assembly is positioned on the chuck , wherein the alignment apparatus is configured to align optical axes of the optical components to an angle of deviation (α) of less than about 1,000 grad and provide a polarization extinction ratio within the optical assembly of greater than or equal to 1000: 1; wherein the adjustable flexure assembly is rotatable around a datum axis ; wherein the adjustable flexure assembly further comprises a tip-tilt assembly disposed around the chuck , the tip-tilt assembly comprising: a base plate defining a support surface ; an adjustable plate adjustably coupled to the base plate , the adjustable plate supporting the plurality of flexures thereon; and one or more adjustment actuators configured to adjust a position of the adjustable plate relative to the support surface of the base plate . a chuck configured to support the optical assembly thereon; and an adjustable flexure assembly disposed around the chuck , the adjustable flexure assembly comprising a plurality of flexures , wherein: the plurality of flexures are positioned relative to the chuck such that each of the plurality of flexures contact the optical assembly when the optical assembly is positioned on the chuck ; and adjustment of a position of one or more flexures of the plurality of flexures adjusts an alignment of an optical axis of an optical component of the optical assembly when the optical assembly is positioned on the chuck , wherein the alignment apparatus is configured to align optical axes of the optical components to an angle of deviation (α) of less than about 1,000 grad and provide a polarization extinction ratio within the optical assembly of greater than or equal to 1000: 1; the plurality of flexures are positioned relative to the chuck such that each of the plurality of flexures contact the optical assembly when the optical assembly is positioned on the chuck ; and adjustment of a position of one or more flexures of the plurality of flexures adjusts an alignment of an optical axis of an optical component of the optical assembly when the optical assembly is positioned on the chuck , wherein the alignment apparatus is configured to align optical axes of the optical components to an angle of deviation (α) of less than about 1,000 grad and provide a polarization extinction ratio within the optical assembly of greater than or equal to 1000: 1; wherein the adjustable flexure assembly is rotatable around a datum axis ; wherein the adjustable flexure assembly further comprises a tip-tilt assembly disposed around the chuck , the tip-tilt assembly comprising: a base plate defining a support surface ; an adjustable plate adjustably coupled to the base plate , the adjustable plate supporting the plurality of flexures thereon; and one or more adjustment actuators configured to adjust a position of the adjustable plate relative to the support surface of the base plate . a base plate defining a support surface ; an adjustable plate adjustably coupled to the base plate , the adjustable plate supporting the plurality of flexures thereon; and one or more adjustment actuators configured to adjust a position of the adjustable plate relative to the support surface of the base plate . <EOS>