A vacuum temperature-controlled optical path purification device

Abstract

The invention provides a vacuum temperature control light path purification device, comprising a first light path temperature isolation ring (1), a temperature control ring (2), a vacuum purification ring (3) and a second light path temperature isolation ring (4), wherein one end of the first light path temperature isolation ring (1) is in seamless connection with one end of the temperature control ring (2), the other end of the temperature control ring (2) is in seamless connection with one end of the vacuum purification ring (3),the other end of the vacuum purification ring (3) is in seamless connection with one end of the second light path temperature isolation ring (4), and the other end of the second light path temperature isolation ring (4) is connected with a subsequent optical element. By using the vacuum environment, the device can effectively prevent air heat conduction, protect a molecular cell from being affected by the external environment, protect a subsequent optical device, particularly protect the receiving end face of a photoelectric detector from being polluted and effectively prolong the service lives of the both.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a vacuum temperature-controlled optical path purification device. Background technique [0002] In laser radar systems, especially wind and temperature measurement laser radar, daytime observation laser radar, laser frequency locking and other systems, as well as in spectroscopy applications, gas cells filled with gas molecules / atoms / molecular compounds are used for frequency stabilization, Calibration of frequency discrimination, light filtering and wavelength testing instruments, etc. Since the substances in these gas cells have specific absorption spectra, the laser beam interacts with gas molecules / atoms / molecular compounds when passing through these gas cells. These molecular pools usually need to be placed in a temperature-controlled heating device, and there are precise temperature control equipment to control the temperature of the molecular pool. However, at the two e...

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Problems solved by technology

However, at the two end faces of the molecular pool, because these two end faces are very easy to contact with the outside air, when the external environment changes, the temperature of the end face and the center of the molecular pool is different, and even the end faces of the molecular pool will cause condensation molecules (such as iodine gas cell), resulting in inaccurate experimental measurements and even damage to the molecular cell

[0003] At present, in the optical system using the molecular pool, the free-space optical path design method is usually adopted, which makes the molecular pool and other optical components in the system independent, does not form a unified whole, and cannot effectively protect the molecular pool

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