Lens array and PD array high-precision alignment mounting device and alignment method thereof

Abstract

The invention relates to a lens array and PD array high-precision alignment mounting device and an alignment method of the lens array and PD array high-precision alignment mounting device. The alignment method comprises the steps of adjusting the expansion link of a stepping booster until the photosensitive surface of the PD array passes through the lens array to be clearly imaged on an image acquisition CCD (Charge Coupled Device), recording the adjusting distance h1 of the expansion link of the stepping booster, acquiring the position coordinates (xn, yn) of the circular center of each circular photosensitive surface of the PD array in the image and computing the slope k1 of the connecting line of the circular centers of the photosensitive surfaces; adjusting the stepping booster again, enabling the lens array to be imaged in an image acquisition CCD viewing field clearly, recording the adjusting distance h2 of the expansion link of the stepping booster, acquiring the position coordinates (x'n, y'n) of the circular center of a clear aperture of the lens array corresponding to the PD array, and computing the slope k2 of the connecting line of the circular centers of the clear apertures of the lens arrays; adjusting a high-precision fine adjustment frame to adjust the position of the lens array according to the calculated values of deltaxn, deltayn and arctan(k1)-arctan(k2); and repeating the operations until meeting the following conditions: deltaxn and deltayn are both equal to 0 and K1 is equal to k2. The device and the method can realize mounting alignment automation of the lenses.

Description

technical field [0001] The invention belongs to the field of optical communication, relates to a photoelectric module in the optical communication technology, and is especially suitable for realizing high-precision alignment of a lens array and a photodiode array (Photodiode, PD) or a laser array and an alignment method thereof. Background technique [0002] Automated image processing technology is widely used in all walks of life, from automatic reading and tracing of barcodes on production lines, automatic identification of license plates, automatic defect detection of parts, DVD identification and automatic return to guiding robots for equipment assembly, etc., image processing technology is play a huge role. The wide application of image processing technology is mainly due to the characteristics of image processing technology such as intelligence, stability, good repeatability, and high precision, which can replace a large amount of manual and repetitive labor. It is pre...

AI Technical Summary

Problems solved by technology

In the operation of the patch, the human eye is used to judge whether the center of the lens array coincides with the center of the photosensitive surface of the PD array. This method has a large human error in judging the center of the two, and the repeatability is not good; PD array, whose photosensitive surface is only tens of microns, makes the judgment error of center alignment larger. On the other hand, high-precision placement machines are expensive and maintenance costs are also high

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