Request InfoOptical Surfaces Ltd.Compact tube collimators from Optical Surfaces Ltd. are based on the company's precision off-axis paraboloids, which use zero expansion for long-term stability. The units, fabricated in aluminum with matte black walls, can be athermalized to suit a variety of conditions, and the optics within them are prealigned in stress-free mounts. The company says that the devices maintain alignment while being transported. Precision mounts that provide a platform for off-axis, spherical or flat mirrors up to 250 mm in diameter complement the company's range of mounts for large optics.See full productRelated content from Photonics MediaPRODUCTSPhotonics Spectra January 2024 IssueMirror MountsThe OS series of large-diameter mirror mounts from Optical Surfaces Ltd. provides a secure platform for larger, high-precision flat, off-axis, and spherical mirrors. 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