Heat-eliminating image-stabilizing lens of astronomical spectrometer camera based on liquid lens

Abstract

The invention discloses a liquid lens-based astronomical spectrometer camera heat elimination image stabilization lens, which comprises a fused quartz lens and a calcium fluoride lens, a refractive index matching liquid layer is filled between the fused quartz lens and the calcium fluoride lens, and the front and rear surfaces of the refractive index matching liquid layer are respectively in direct contact with the fused quartz lens and the calcium fluoride lens. The fused quartz lens, the refractive index matching liquid layer and the calcium fluoride lens jointly form a lens triplet structure, when the curvatures of the front surface and the rear surface of refractive index matching liquid are the same, the refractive index matching liquid layer is used for eliminating reflection loss of a lens-air interface, and when the curvatures of the front surface and the rear surface of the refractive index matching liquid are different, the refractive index matching liquid layer is used for eliminating reflection loss of a lens-air interface. The refractive index matching liquid layer is equivalent to a liquid lens. By using the athermal image stabilization lens provided by the invention, the imaging quality of the camera can be kept stable in a wide temperature range change, and the problem of spectral line drift of a spectrograph caused by observation of an astronomical optical telescope in an environment with a large station address temperature difference can be solved.

Description

technical field [0001] The invention belongs to the technical field of astronomical optical instruments, and in particular relates to a heat dissipation and image stabilization lens for an imaging spectrometer camera for an astronomical optical telescope based on a liquid lens. Background technique [0002] Astronomy is a science driven by telescopes, and telescopes play an important role in promoting the development of astronomy. Astronomical telescopes are the main tools for observing celestial objects and capturing information about celestial objects. There are many astronomical instruments at the back end for processing observation signals. As one of the main terminal instruments of an optical telescope, the spectrometer decomposes the complex color light collected at the front end of the telescope into spectral lines and images them on the image plane of the detector. A typical astronomical spectrometer system usually includes an entrance slit, a collimating element, a...

AI Technical Summary

Problems solved by technology

One is to maintain the focus position through the positive and negative refractive index compensation of multiple sets of cemented lenses. This kind of camera requires a large number of lenses and a long lens barrel; the other is to install a temperature control system on the spectrometer as a whole to reduce the spectral line drift through constant temperature control. , but the structure of the temperature control system is complicated, which will make the overall structure of the spectrometer occupy more of the limited back-end space of the telescope. Therefore, there are fewer telescopes using this method, and it is not suitable for the transformation of old instruments.

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