Positioning racking system for coating film on large-size optical element

By designing a positioning and mounting system for large-size optical components, and employing a lifting system combining ball screws and worm gear reducers, the surface accuracy and safety issues of existing coating auxiliary mounting systems have been solved, achieving high-precision installation and a safe and reliable coating process.

CN121992353APending Publication Date: 2026-05-08SHANGHAI INSTITUTE OF TECHNICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Application Number
CN202610354386.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-23
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing coating auxiliary installation systems have high start-up speeds, sudden stops, and fast lifting rates during the lifting process, which cannot guarantee the high precision requirements of optical component surface shape; the fork arm platform tilts severely under heavy loads, making it difficult to install the product with the coating machine workpiece frame; and hydraulic lifting equipment is prone to causing the lens to fall after failure, resulting in high usage risks.

Method used

A positioning and mounting system was designed, comprising a main structure, a lifting mechanism, a rotating bearing platform, and a motion mechanism. The lifting system uses a combination of ball screws and worm gear reducers and is equipped with safety features such as tilt detection and axial pressure sensors to achieve smooth and precise lifting and safety protection.

Benefits of technology

It achieves the high-precision surface shape requirements of optical components, reduces the risk of platform tilting, improves installation accuracy and safety, reduces operation time, and improves surface quality.

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Abstract

The invention discloses a positioning racking system for coating a large-size optical element. The positioning racking system comprises a main body structure, a lifting mechanism, a rotary bearing platform, a movement mechanism and a safety protection mechanism. A main body structure adopts a rigid design of composite support of a tripod and a tailstock. The lifting mechanism drives double ball screws to move synchronously through a worm and gear speed reducer, and precise lifting of the bearing platform is achieved. The rotary bearing platform can freely rotate by 360 degrees and is provided with a balance weight groove to adjust the gravity center. And the movement mechanism realizes flexible movement and stable support of the system. The safety protection mechanism integrates inclination angle, overload and limiting detection. The problems that a large-size and high-surface-shape-precision optical element is difficult to mount and position and poor in operation safety in the coating process are solved, and auxiliary mounting and positioning of a tool are safely, conveniently and precisely completed outside a coating machine.
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