The optical fiber panel is a large-section passive rigid imaging device made of millions of step-type multi-mode optical fibers after drawing processing, with a compact structure and is not easy to deform. The optical fiber monofilaments are arranged relative to the input end face and the output end face of the optical fiber panel, and their relative spatial position coordinates at both ends of the panel are exactly the same. The input and output end faces of the fiber optic panel correspond one-to-one, and the image transfer magnification of the fiber optic panel is 1. The image transmission mechanism of the optical fiber monofilament determines the image transmission mechanism of the optical fiber panel, and the related arrangement characteristics of the optical fiber monofilament determine the image transmission characteristics of the optical fiber panel.
Each fiber in the fiber optic panel has a good and independent ability to transmit light energy, the fibers will not cross talk with each other, and the fiber cladding has good optical insulation; each fiber filament end face of the incident end face of the fiber optic panel can be viewed. As a sampling hole, the sampling hole independently transmits a pixel with a certain brightness through its own optical fiber channel; the target is imaged on the incident end face of the optical fiber panel coupled with the focal plane of the system through the pre-objective optical system, and is sampled by each The hole is divided into a number of pixels with different brightness, so the incident end face of the entire fiber panel can be regarded as a resolver with many sampling holes arranged regularly; each pixel is independently transmitted along its own fiber channel, Since the incident and outgoing end faces of the fiber optic panel are arranged in a correlated manner, all the picture elements transmitted by each fiber will be recombined into an image that is exactly the same as the incident end face at the outgoing end face of the optical fiber panel. This is the image transmission mechanism by which the fiber optic panel can transmit the image from the incident end face to the outgoing end face. Since the optical fiber panel will generate light energy loss during the image transmission process, the outgoing.
The brightness of the image of the end face is attenuated by approximately the same degree as that of the image of the incident end face. It is worth stating that the effect of fiber optic panels, and even all fiber optic imaging devices, on an image is “transmission”, that is, image transmission, rather than the “imaging” effect of traditional physical lenses. the difference. In addition, the structural characteristics and imaging mechanism of the optical fiber panel also determine that the image transmitted by the optical fiber panel will inevitably have granularity, that is, the characteristics of discrete imaging. For example, the optical fiber panels are arranged in a regular hexagonal close-packed arrangement, and the image pixels formed by the exit end face of the optical fiber panels are arranged in a honeycomb shape. This also inevitably leads to the same optical environment, the image quality of the optical fiber relay imaging system with the optical fiber panel as the image sensor is obviously lower than that of the traditional optical imaging system composed of continuous physical mirror groups.