LBTEK Compact Reflective Collimators are precisely positioned and packaged with off-axis parabolic mirrors, with a stainless steel housing. For the 25.4 mm RFL collimator, the reading step of the radial scale is 10°. For the 50.8 mm RFL collimator, the step of the radial scale is 10°, and an axial scale is also provided, with the spacing between adjacent scale lines of the axial scale being 1 mm. They can be directly mounted in LBTEK's 16 mm coaxial cube. The internally configured off-axis parabolic mirror enables the focal length of the mirror to remain constant over a wide wavelength range. Due to this inherent property, compact reflective collimators can collimate light of different wavelengths without adjustment, which makes them an ideal choice for collimating polychromatic light. They are commonly used for collimating broadband light source systems, infrared beam collimation/coupling systems, and polychromatic light coupling systems.