Optical thermostat with comprehensive vibration reduction and low-temperature in-situ displacement functions

By employing graded vibration reduction and dual-system frequency difference decoupling design and modular thermal insulation structure, the contradiction between vibration isolation, in-situ displacement capability, convenience and cost in low-temperature optical thermostats has been resolved, achieving efficient cooling, low-temperature in-situ micron-level displacement and convenient sample replacement.

CN121534801AActive Publication Date: 2026-02-17BEIJING INST OF TECH
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Patent Information

Application Number
CN202511531081.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-24
Publication Date
2026-02-17
Estimated Expiration
2045-10-24

AI Technical Summary

Technical Problem

Existing cryogenic optical thermostats present a trade-off between vibration isolation, in-situ displacement capability, convenience, and cost, making it difficult to simultaneously meet the requirements of efficient cooling, cryogenic in-situ micron-level displacement, and convenient sample replacement.

Method used

It adopts a graded vibration reduction and dual-system frequency difference decoupling design, combined with non-contact suspension support and modular thermal insulation structure, and uses a general GM refrigeration unit. Through the combination of support vibration reduction frame, suspension support system, displacement structure and thermal insulation and heat conduction system, it achieves system-level vibration isolation and low-temperature in-situ displacement.

Benefits of technology

It achieves high-precision micron-level displacement in low-temperature environments, reduces vibration transmission rate to below 10%, improves the convenience of sample replacement and the versatility of the system, and reduces costs.

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Abstract

The invention discloses an optical thermostat with comprehensive vibration reduction and low-temperature in-situ displacement functions, which adopts upper and lower opposite vibration absorbers and a large-mass base to realize first-order to second-order inertial vibration absorption, and further realizes thorough decoupling with an optical platform in a suspension type non-contact manner, and the vibration transmissibility can be reduced to be less than 10%. Resonant frequencies of two systems (a sample table system and a cold head system) are designed to achieve vibration decoupling. The technical problems that in the prior art, the high-grade vibration isolation capacity is insufficient, refrigerator noise is easily coupled to a measuring light path, the low-temperature in-situ precision displacement capacity is lacked, and the contradiction between heat isolation, convenience and cost is difficult to balance can be solved. Under the support of a conventional GM refrigerator, the comprehensive requirements of ultralow basic vibration, strong decoupling of a measurement light path, low-temperature in-situ micron-sized displacement, convenient sample replacement and efficient refrigeration / thermal control are met at the same time.
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