A highly stable grating splicing five-dimensional adjustment mechanism

Abstract

The invention discloses a highly stable grating splicing five-dimensional adjustment mechanism, which comprises a base, a splicing grating unit, a base plate, a stable fine-tuning self-locking mechanism, a spring pre-tightening component, a stable fine-tuning mechanism, and a slidable ball hinge fine-tuning mechanism. The stable fine-tuning mechanism and the slidable ball hinge fine-tuning mechanism are arranged at the bottom of the splicing grating unit, and the three stable fine-tuning self-locking mechanisms are arranged in an isosceles triangle distribution on the back of the splicing grating unit. The stable fine-tuning mechanism, the slidable ball hinge The fine-tuning mechanism and the stable fine-tuning self-locking mechanism are used together for five-dimensional adjustment and decoupling. The present invention uses a spring to apply a pre-tightening force to the grating unit and the adjustment mechanism to complete the five-dimensional stable fine-tuning of the grating unit, and utilizes the flexibility of the tension spring and the slidable ball hinge mechanism to ensure that the fixation of the grating unit does not cause over-constraint, and in the grating No interference occurs during the multidimensional adjustment of the unit.

Description

A five-dimensional adjustment mechanism for highly stable grating splicing technical field The invention belongs to optical precision instrument adjustment, installation field, be specifically related to a kind of grating splicing five-dimensional stable fine-tuning mechanism. Background technique In the field of astronomical technology, grating is the most commonly used dispersive element in optical precision instruments such as spectrometers. The volume of astronomical optical telescopes and spectrometers has become larger, and the application size of echelle gratings has reached 1200mm × 300mm. The connection manufacturing size cannot reach 1 meter level, so the mechanical splicing method is used to achieve the application size. Grating mechanism for mechanical splicing It is required that the adjustment error range of the grating unit in the six degrees of freedom during the splicing adjustment is in the sub-micron level and the sub-micro radian level, and Put...

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Problems solved by technology

The adjustment and locking of the existing optical precision adjustment mechanism are independent of each other, which will cause slight changes in the adjustment mechanism during the locking process, and the loosening of the adjustment mechanism or the locking mechanism will cause adjustment misalignment, so that it cannot maintain long-term stability sex

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