Multi-dimensional collimator adjusting device and assembly adjusting method

The invention belongs to the technical field of optical adjustment and testing of collimators, and discloses a multi-dimensional collimator adjusting device, comprising a support platform, a movable plate, three support adjusting devices and longitudinal adjusting devices. The support adjusting devices are arranged in a triangle and each of the support adjusting devices comprises a support leg positioning block, a support leg and a support frame pressing block. Two groups of longitudinal adjusting devices are arranged on the support platform. The movable plate is located between the two groupsof longitudinal adjusting devices. The multi-dimensional collimator adjusting device can unify the coordinate systems of a mechanical system and a light source system, and fixes a long optical flat to the whole device to be tested, enables the parallel light emitted by the collimator to the parallel with the setting surface of the coordinate system of the whole mechanical system through the adjusting device, satisfies th