一种提高双CCD图像拼接精度的方法

利用一对光楔间距变化时,通过它的成像光束的像点会产生微小偏移这一特性,在双CCD图像拼接探测器中增加了光楔调整机构,该光楔调整机构包含两对光楔,一对光楔用于CCD水平方向的图像调整;另一对用于垂直方向的图像调整。通过设计、制作,光楔调整机构最终应用于双CCD图像拼接探测器的装调。装调过程显示:加装光楔调整机构对原有光学系统没有任何影响,可以实现精度高于0.001 mm的图像移动量,有效降低了双CCD图像拼接探测器的装调难度,提高了拼接图像质量,降低了生产成本。

Improving image stitching accuracy for double CCD

The imaging ray will have a small displacement when the space between a pair of light wedges is changed. A light wedge regulation device is added in the detector of double CCD image stitching, which includes two pairs of light wedges, one pair is used for the image regulation in horizontal direction, while the other is used for image regulation in vertical direction. A light wedge regulation device was designed and manufactured. It is incorporated in the detector for tuning double CCD image stitching. The assembly and tuning process shows that the regulation device does not have any negative impact on the original optical system, and it can realize image displacement with accuracy better than 0.001mm. It reduces the detector assembly and tuning complexity for double CCD image stitching, improves image stitching quality and saves the production cost.