A reflective prism device

Abstract

The invention provides a reflective prism device and a method for fixing the reflective prism. The reflective prism device comprises: a prism body, a boss is provided on both sides of the prism body; A side fixing component, the fixing plane on the back of the prism is pasted and fixed on the back of the prism body, the side fixing components of the prism are arranged on both sides of the fixing plane on the back of the prism and are used to fix the boss on the fixing seat of the prism above; wherein the prism side fixing assembly includes a step for carrying the boss and a boss pressing member, and the boss pressing member is used for pressing and fixing the boss on the step. The reflective prism device of the present invention absorbs the force generated by the deformation of the reflective prism by the deformation of the reed in the direction of gravity, and uses cementation in the horizontal direction to absorb the stress generated when the reflective prism expands or contracts, thereby realizing stress-free fixing of the reflective prism, effectively Controlled the prism surface type.

Description

technical field [0001] The invention relates to the field of optical instruments, in particular to a reflection prism device. Background technique [0002] The design and manufacture of high-precision optical lenses is a very complicated process. Due to the higher and higher requirements for the imaging quality of the optical system, there are more and more optical components, and the optical path is becoming more and more complex, and the optical components are required to have micron-scale The positioning accuracy is high, and at the same time, it is necessary to maintain the surface accuracy of ten nanometers. [0003] In the catadioptric optical system, since the light deflection error is twice the deflection of the reflective surface, the reflective prism often requires higher positioning accuracy and surface accuracy requirements (ten nanometer surface accuracy), which requires a fixed structure to reflect the reflective prism. The influence of the surface shape is ve...

AI Technical Summary

Problems solved by technology

[0003] In the catadioptric optical system, since the light deflection error is twice the deflection of the reflective surface, the reflective prism often requires higher positioning accuracy and surface accuracy requirements (ten nanometer surface accuracy), which requires a fixed structure to reflect the reflective prism. The influence of the surface shape is very small. The existing high-precision prism fixing methods are mostly the method of directly bonding the prism to the high-precision mechanical surface, but when the prism has a large size and weight (weight greater than 0.5kg), in this way Under the action of shock, vibration, temperature change, etc., the fixed prism will have a large change in the surface shape of the reflective prism, and even the phenomenon of prism falling off; if the method of directly clamping on the working surface is used, only submicron or even Micron-level surface accuracy

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