Adjusting method of drift angles of plurality of TDI (Time Delayed and Integration)-CCD (Charge Coupled Device) cameras spliced in staggered manner

Abstract

The invention discloses an adjusting method of drift angles of a plurality of TDI (Time Delayed and Integration)-CCD (Charge Coupled Device) cameras spliced in a staggered manner. The adjusting method comprises the following steps: step 101: measuring to obtain overlap joint image element column n of two adjacent TDI-CCDs when the drift angle is zero; step 102: calculating the image element column number m of repeated images shot by the two adjacent TDI-CCDs; and the step 103: adjusting a drift current adjusting mechanism so as to enable the image element column number m of the repeated images to tend to be identical to the overlap joint image element column number n. According to the adjusting method, the calibration of an intermediate link can be avoided, the tail end of an imaging link, namely an image, is directly processed firstly, the drift angles are adjusted by calculating the overlap joint image element column number between the two TDI-CCDs, the realization is simple, and the drift current adjusting speed is quick, so that the adjusting method is extremely suitable for being used in imaging experiment of a ground turntable of the TDI-CCDs.

Description

technical field [0001] The invention relates to a method for adjusting the deflection angle of a TDI-CCD camera, in particular to a method for adjusting the deflection angle of a multi-chip interlaced TDI-CCD camera, which is suitable for application in the ground imaging experiment of an aerospace camera. Background technique [0002] TDI (Time Delayed and Integration)-CCD, namely Time Delayed Integral CCD, is a new type of photoelectric sensor developed in recent years. TDI-CCD is based on multiple exposures to the same target. Through the method of delay integration, the collection of light energy is greatly increased. Under harsh environmental conditions, such as places with low light, it can also output signals with a certain signal-to-noise ratio. In space-to-ground remote sensing, using a TDI-CCD device as a focal plane detector can reduce the relative aperture, thereby reducing the weight and volume of the detector. When using TDI-CCD to image a moving target, it ha...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the existing method of adjusting the drift angle of the ground imaging experiment of the aerospace camera, the calibration accuracy of each link is very high, and the accuracy and speed are difficult to guarantee when the drift angle is adjusted frequently. A method for adjusting the deflection angle of multi-chip interleaved TDI-CCD cameras, which is applied in the ground imaging experiment of aerospace cameras, is simple and efficient, and can meet the needs of frequent adjustments

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