Light homogenizer and application of optical fiber panel

Abstract

The invention relates to a light homogenizer and application of an optical fiber panel. Due to the adoption of a charge coupled device (CCD) camera of which the focal length is more than or equal to 16 millimeters, the petal phenomenon is likely to occur after an image is formed within close range by a near-field marker, and the uniformity cannot meet the requirement. In order to solve the problems of petals and particularly the near-field marker, the light homogenizer is arranged additionally on the basis of the original design. The light homogenizer comprises a cylindrical shell (6), wherein a high-uniformity optical fiber panel (7) is arranged at one end of the cylindrical shell, and a luminous combination is arranged at the other end of the cylindrical shell; and the luminous combination comprises a circuit board (4) and a group of luminous devices (1). The light homogenizer is an important facility for solving the problem of uniformity in the near-field marker.

Description

Technical field: [0001] The invention relates to a uniform light device for an active optical (target) mark. Background technique: [0002] An active optical (target) marker, in order to have the advantages of small size, light weight and low power consumption, while ensuring high reliability, long life, and meeting the requirements of large radiation power, the light source of the marker is preferably several or several It consists of ten LEDs / IREDs, but each of them is a point light source. The spatial distribution of the radiant light intensity of such a marker is not uniform, and in the application as a cooperative target of a CCD optical imaging sensor, petals will appear after imaging in a relatively short range. Although the near-field petal problem of the marker is related to the focal length of the camera, the most fundamental reason is that the light source of the marker is composed of several or dozens of point light sources, and there must be a certain distance ...

AI Technical Summary

Problems solved by technology

[0006] 2. The solution of using Fresnel lenses and compound glasses: the small lens of the compound glasses cannot be made small enough, the light uniformity is limited, it cannot meet the requirements, and the volume is relatively large

[0007] 3. The solution based on the particle light guide plate: the particle light guide plate is also called uniform light plate, which can be used in the visible light band and does not require high uniformity. At present, there is no uniform light plate in the near infrared band in China.

However, due to manual arrangement, the light-emitting surface that can be realized is small and the accuracy is poor. When the light-emitting surface is large, the coupling between the input terminal and LEDs / IREDs is also difficult, which will reduce the transmission efficiency

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