A scene simulator system with a large field of view and a large dynamic range of object distance

Abstract

The invention belongs to the technical field of optical testing and especially relates to a scene simulator system with a large view field and a super large dynamic range object distance. The scene simulator system comprises an object lens assembly, a graticule, an illumination assembly, a micrometer head and a mechanical support structure. The scene simulator system further comprises an image quality compensation mirror. According to the invention, the image quality compensation mirror is added in front of a focal plane of the object lens assembly, so that the simulation function of scene objects from 0.5m to an infinite distance is realized, and the defect of conventional scene simulation that the scenes only from a distance of 100 times of the focal length to the infinite distance can be simulated is overcome; a relatively large view field is obtained, and the gaps of the scene simulation system with the large view field and the super large dynamic range object distance both in the country and abroad are filled; in addition, the scene simulator system is capable of simulating the scene objects from 0.5m to the infinite distance, and the simulation precision of an object lens reaches 1%.

Description

technical field [0001] The invention belongs to the technical field of optical testing, in particular to a scene simulator system with a large field of view and a super large dynamic range object distance. Background technique [0002] The scene simulator is a testing device that simulates the test target on the ground in order to test the function and performance of the recognition algorithm and imaging quality of the camera under test. At present, the infinity scene simulator commonly used at home and abroad is a collimator. By installing a static reticle or a dynamic target simulator on the focal plane of the optical system to simulate an infinite target, the imaging quality of the camera under test is tested and evaluated; and For the simulation of finite distance targets, there are two methods. The first is to simulate the finite distance target by defocusing the target plate installed on the focal plane of the collimator, and the second is to customize the finite dista...

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Problems solved by technology

[0003] For the test equipment, it must first be guaranteed that its performance index should be an order of magnitude higher than the technology of the camera under test, and secondly, it should have high cost performance and strong versatility, while the above two limited distance object simulators Both have certain defects: the first kind of scene simulator can simulate an infinitely distant target to a finitely distant target, and its realization principle is to realize a certain amount of defocusing through the reticle installed on the Due to the limitation of the characteristic (depth of field) itself, in order to ensure that the simulated scene has a high image quality and test accuracy, the simulated object distance should generally not be less than 100 times the focal length. Therefore, for a collimator with a focal length of 1m, The closest target of the simulated scene is 100m, and the field of view of the simulated scene is very small, which is generally classified as "sub-level". As for the second kind of scene simulator mentioned above, it is a customized scene simulator. This kind of scene simulation The device can be customized according to the observation distance of the camera under test, and can simulate ultra-short-range targets, but this scene simulator is also limited by optical characteristics (depth of field), and can only simulate scenes within a certain distance range, such as 3m to 5m, etc. It cannot realize the simulation of large dynamic range objects, and can only be used with specific cameras, which is not universal and has low cost performance

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