Removable large-diameter universal integrating sphere

Abstract

The invention discloses a movable large-diameter universal integrating sphere, which includes an optical-mechanical system and an electric control part; the optical-mechanical system includes an integrating sphere hemisphere (1), a screen (2), an extension section (3), a lamp panel ( 4) and a mechanical support (5); the opening diameter of the integrating sphere hemisphere (1) is 800 mm to 1000 mm; the lamp panel (4) is evenly embedded on the inner circumference of the screen (2); the screen (2) is used to block the incident light source Interference with the uniformity of the opening; the extension section (3) connects the integrating sphere hemisphere (1) and the screen (2), and is fixedly connected to the mechanical support (5) together. In the present invention, the shielding screen (2) is designed in the optical-mechanical system to block the interference of the incident light source on the uniformity of the opening and effectively improve the surface uniformity of the radiation. At the same time, the present invention adopts an extension section to connect the hemisphere of the integrating sphere and the shielding screen, which increases the distance between the light source and the inner wall of the integrating sphere, and further improves the anti-interference ability of the opening to the primary light.

Description

technical field [0001] The invention belongs to the field of satellite system-level testing of payloads of remote sensing satellites, and in particular relates to a device for testing visible light payload cameras. Background technique [0002] Remote sensing satellite payload is one of the important subsystems of remote sensing satellite. It is the eye of the remote sensing satellite, and its main function is to carry out reconnaissance and observation of ground targets or scenes through the payload camera, convert the observed optical signal into an electrical signal, and use the digital transmission channel to transmit the signal to the ground station to complete the ground target. and collection of scene information. [0003] The earth observation data obtained from the space camera can only obtain the quantitative radiation information of various ground objects through radiometric calibration, and then use the atmospheric transmission model to invert the spectral refle...

AI Technical Summary

Problems solved by technology

Although there are large-diameter integrating spheres in foreign countries, their openings are also small, and due to the increase in opening diameter, the surface uniformity is not high (only between 7.5% and 10%), the utilization rate of light energy is low, and the loss of light energy is serious. , at the same time, the foreign integrating sphere is large in size and cannot be moved, and the test angle is single

In addition, the inner wall coating of the integrating sphere in the prior art usually uses barium sulfate as the diffuse reflection material coating, and its reflectance is relatively low, only about 93% in the visible to near-infrared region, and only 80% in the ultraviolet region. Around, the general radiance range is 10W / m 2 Sr~90W / m 2 Sr

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