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High-efficiency visible-infrared common-caliber off-axis optical system

An optical system and common aperture technology, applied in the field of optical systems, can solve the problems of large system size and low optical system efficiency, and achieve the effects of small size, reduced number of lenses, and compact layout

Inactive Publication Date: 2021-01-15
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology

[0005] The two dual-band optical systems introduced in the articles Proc.of SPIE Vol.6940 69400U and Proc.of SPIE-OSA / Vol.765276522E both contain eight infrared lenses. Not only the optical system efficiency is low, but also the system is bulky

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  • High-efficiency visible-infrared common-caliber off-axis optical system
  • High-efficiency visible-infrared common-caliber off-axis optical system
  • High-efficiency visible-infrared common-caliber off-axis optical system

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings. like figure 1 As shown, a high-efficiency visible-infrared co-aperture off-axis optical system in the present invention consists of a primary mirror 1, a secondary mirror 2, a dichroic filter 3, a visible three-mirror 4, a visible refracting mirror 5, a visible light detector 6, Three infrared mirrors 4a, four infrared mirrors 5a, infrared turning mirror 6a, first lens 7, second lens 8, third lens 9, infrared window 10, and infrared detector 11. Consists of two parts, the off-axis three-mirror optical system of the visible light channel and the cooled off-axis optical system of the infrared channel. The visible light channel and the infrared channel share the primary mirror 1 and the secondary mirror 2. The two channels are separated by the color separation film 3 and can be folded up by the three mirrors. . The aperture stop of the off-axis three-mirror opti...

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Abstract

The invention discloses a high-efficiency visible-infrared common-caliber off-axis optical system. A diaphragm of a visible light channel off-axis three-mirror optical system of the optical system isarranged on a primary mirror, a diaphragm of an infrared channel refrigeration type off-axis optical system of the optical system is arranged on a cold diaphragm, and the cold diaphragm is also an exit pupil of the system. The optical system is an off-axis two-reflection main optical system shared by visible light and infrared light, infinite light of an object side enters a primary mirror, reaches a secondary mirror through the primary mirror, reaches a color separation film after being reflected by the secondary mirror, reaches a third visible mirror after being reflected by the third visible mirror, reaches a visible turning reflector after being reflected by the third visible mirror, and reaches a visible light detector after passing through the visible turning reflector; infinite light of the object space enters the primary mirror, reaches the secondary mirror through the primary mirror, reaches the color separation film after being reflected by the secondary mirror, reaches the third infrared mirror after being transmitted by the color separation film, reaches the fourth infrared mirror after being reflected by the third infrared mirror, reaches the relay optical system afterbeing reflected by the infrared turning reflector, reaches the infrared window after being refracted by the relay optical system, is transmitted by the infrared window, and reaches the diaphragm andreaches the infrared detector after passing through the diaphragm.

Description

technical field [0001] The invention relates to the technical field of space optical remote sensors, in particular to an optical system with a visible and infrared common aperture optical system with high efficiency. Background technique [0002] Satellite remote sensing cameras can be seen in the near-infrared spectrum, and can be widely used in ecological environment monitoring, land and resources surveying, marine supervision, geological disaster monitoring and other fields. The infrared spectrum of the satellite remote sensing camera can not only obtain the outline information of the target, but also obtain the temperature information of the target, so as to identify the state of the target. Compared with the uncooled infrared optical system, the cooled infrared optical system has the advantages of Higher sensitivity and signal-to-noise ratio and more space utilization advantages. With the demand for high-resolution, multi-spectrum, and multi-dimensional data fusion of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B17/06G02B27/00
CPCG02B17/0647G02B27/0012
Inventor 贾永丹聂云松刘剑峰孙建黄伟阮宁娟
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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