Space refraction and reflection type multichannel imaging optical system

Abstract

A space refraction and reflection type multichannel imaging optical system comprises a main lens, a refraction and reflection type secondary lens, a third lens, a switching reflection lens, a color separation film, a shimmer channel focal plane device, and a visible light and near-infrared channel focal plane device. After the radiation beam of an imaging object is reflected through the main lens, the light beam of a visible light and near-infrared channel reaches the color separation film, and then forms an image at the position of a visible light channel focal plane after being reflected and transmitted through the front surface and the rear surface of the refraction and reflection type secondary lens and then reflected through the third lens. The light beam of a near-infrared channel transmits through the color separation film and forms an image at the position of the near-infrared focal plane device. After the switching reflection lens is switched and a light path is switch-in, the light beam of a shimmer channel is reflected through the main lens and then reflected through the refraction and reflection type secondary lens and the third lens and then is incident to a shimmer and visible near-infrared switching reflection lens, and the light beam of the shimmer channel is reflected through the front surface to be incident to the shimmer channel focal plane device to form an image. The space refraction and reflection type multichannel imaging optical system is simple in model, compact in structure, small in size, low in weight, large in visual field, capable of achieving a large-range and high-resolution dynamic monitoring function in daytime, morning and dusk.

Description

technical field [0001] The invention belongs to the technical field of space optical remote sensors, and relates to a space catadioptric multi-channel imaging optical system. Background technique [0002] With the development of remote sensing technology, all kinds of users have higher and higher requirements for all-day monitoring of ground scenery. The poor morning and evening hours can also realize the high-resolution monitoring function. At present, the visible light channels set up by most satellites in our country only have the ability to observe during the day, and cannot obtain visible light cloud images in the morning, evening and night. Therefore, there is an urgent need to develop high-sensitivity visible light low-light imaging technology to obtain visible light cloud images in the morning, dusk and nighttime low-light conditions, improve the accuracy of low-light cloud and heavy fog recognition, and provide military meteorological services around the clock. ...

AI Technical Summary

Problems solved by technology

However, the use of multiple cameras to achieve multi-time information acquisition will make the size and weight of the space camera very large, increase the launch cost of the satellite, and reduce the reliability of the entire star.

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