IdealPhotonics' autocollimator is a high-precision angle measurement instrument based on the principle of optical autocollimation. Its core function is to detect minute angular deviations (such as tilt or deflection) by coaxially aligning the collimated beam with a reflector, achieving a resolution down to the arcsecond or even sub-arcsecond level.Based on the coaxial principle of optical autocollimation, it achieves non-contact, high-precision measurement of sub-arcsecond angular deviations, while also possessing the capabilities of infinity-based reference simulation and real-time dynamic monitoring.