All-sky atmospheric gravity wave imaging instrument adopting fish eye lens and telecentric beam path

Abstract

The invention provides an all-sky atmospheric gravity wave imaging instrument adopting a fish eye lens and a telecentric beam path, which comprises the No. F2.8 fish eye lens with the focus of 10.5mm, a telecentric lens, a circular light filter with the diameter of 3 inches, a focus reducing lens group, an imaging lens and a scientific grade CCD camera, and OH, O2, OI, Na and other airglows are radiated as tracers, thereby realizing the all-sky atmospheric gravity wave imaging. The telecentric lens is placed in the rear position of a focal plane of the fish eye lens, thereby leading emergent light to meet the requirements on the angle of incident light of the light filter; and then the light sequentially passes through the circular light filter, the focus reducing lens group for focusing and adjusting aberration, the imaging lens and the connected scientific grade CCD camera, thereby realizing the all-sky 180-degree atmospheric gravity wave imaging. The all-sky atmospheric gravity wave imaging instrument utilizes the No. F2.8 fish eye lens with the focus of 10.5mm which is commercially universal at present and is matched with the multi-channel light filter with 3 inches, thereby being more economic and convenient to realize the multi-channel all-sky gravity wave imaging on the basis of ensuring the high light throughput of the whole system.

Description

technical field [0001] The invention relates to an optical imaging design of an all-sky atmospheric gravity wave, in particular to an all-sky atmospheric gravity wave imager using a fisheye lens and a telecentric optical path. Background technique [0002] Atmospheric gravity waves will disturb the airglow radiation layer during the upload process, and the observation of atmospheric gravity wave activities can be realized by using atmospheric airglow radiation as a tracer. In the middle and upper atmosphere, there are many kinds of airglow radiation in the visible light to near-infrared band, such as broadband OH and narrowband O2, OI, Na and other airglow radiation layers, these airglow radiation can be used for gravitational wave activities imaging observation. [0003] At present, the all-sky gravitational wave imager using telecentric optical path includes: fisheye lens, telecentric mirror, filter, reimaging lens and scientific grade CCD camera. For the weak airglow ra...

AI Technical Summary

Problems solved by technology

However, a problem that must be faced with the use of telecentric optical path is: if the size of the limited filter is small, the clear aperture of the fisheye lens should also be small, which is not conducive to satisfying the atmospheric gravity with the weak airglow radiation layer as the tracer. The requirements for wave detection; and if the clear aperture of the fisheye lens is increased, the size of the filter is required to be large

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