Wide spectral segment non-focusing all-day airglow imager

Abstract

The invention relates to an airglow imager. In order to solve the problems that an existing airglow imager is small in detecting view field and narrow in spectral range and needs to adopt a mechanicalfocusing device, so that the structure of the existing imager and using operation are complex, and the luminous flux of the existing imager is low, the wide spectral segment non-focusing all-day airglow imager is provided. The imager comprises an image space telecentric fish-eye lens, an object space telecentric imaging lens and a detector; a filter wheel is arranged between the fish-eye lens andthe imaging lens, a plurality of narrow band filters with different wave bands and the focal power of zero are arranged on the filter wheel, and the narrow band filters can be switched to a focal plane of the fish-eye lens through the filter wheel; the fish-eye lens comprises a negative light focal power front lens set and a positive light focal power back lens set, and an aperture diaphragm is arranged on a light path between the front lens set and the back lens set; the imaging lens comprises a plurality of gluing lenses composed of plus lenses and concave lenses, the absolute value of a relative abbe number difference value of the plus lenses and the concave lenses is greater than or equal to 5, and the absolute value of a relative dispersion difference value of the plus lenses and theconcave lenses is less than or equal to 0.001.

Description

technical field [0001] The invention relates to an airglow imager, in particular to a wide-spectrum non-focusing all-sky airglow imager. Background technique [0002] Airglow is an important natural luminous phenomenon in the earth's space environment. It is a certain wavelength of light emitted by molecules and atoms in the atmosphere excited by the sun's short-wave ultraviolet radiation. It generally appears between 50-500km above the earth, and its brightness is very low. The distribution is uneven and difficult to detect, and only very sensitive instruments can observe it. [0003] The spatial and temporal distribution of airglow is modulated by various atmospheric dynamic processes such as tidal waves, atmospheric gravity waves and planetary waves, and is an important tracer of atmospheric dynamic processes and atmospheric photochemical processes. special status. [0004] like figure 1 , figure 2 As shown, an existing airglow imager consists of a fisheye lens 01, a...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of existing airglow imagers such as small detection field of view, narrow spectral range and the need for a mechanical focusing device, resulting in complex structure and operation of the imager and low luminous flux of the imager, and to provide a wide-spectrum Segment non-focusing all-sky airglow imager

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