Grating Alignment Bonding Method

Abstract

The invention relates to an aligning attaching method for optical gratings and belongs to the optical field. According to the aligning attaching method, the problems that a system is expensive, the high-precision mark is difficult in production of a membrane material, glue leakage and missing are easily caused by virtue of an optical aligning manner in an attachment process of optical gratings are solved. The aligning attaching method comprises the following steps: (1) attaching the surface of a glass panel with a buffer membrane, wherein the buffer membrane is an optical membrane with a base material solid adhesive, the area of the buffer membrane is larger than that of the glass panel, the glass panel is completely covered with the buffer membrane, and the buffer membrane extends to the edge of the glass panel so as to be cut in a later stage; (2) attaching the buffer membrane with an optical grating membrane through a liquid optical adhesive, and adjusting the alignment of the optical grating membrane by virtue of fluidity of the optical adhesive and an optical aligning system, so as to realize the high-precision attachment of the optical gratings; and (3) after the liquid optical adhesive is solidified, cutting redundant parts, exceeding the glass panel, of the buffer membrane and the optical grating membrane, so as to prepare an optical grating attached optical element.

Description

technical field [0001] The invention belongs to the field of optics and relates to grating bonding technology. Background technique [0002] Grating lamination is to bond the soft grating film on the glass or panel through optical glue (solid optical glue, such as OCA or liquid optical glue LOCA), so as to realize the high-precision angular alignment required for 3D display. Angle and position precision fit can ensure the consistency of product parameters and guarantee mass production. [0003] In the existing lamination process, the most common way to achieve high-precision lamination is to use an image sensor (CCD) alignment system to perform image recognition through grating-specific alignment marks, and the platform moves and rotates to achieve high-precision alignment functions. Then attach it with optical glue. see figure 1 shown. [0004] Using the above system requires high-resolution CCD, high-precision mobile rotary platform and corresponding large image proces...

AI Technical Summary

Problems solved by technology

[0008] 1. CCD, high-precision mobile rotary platform and corresponding large image processing system are expensive

[0009] 2. It is difficult to make high-precision and high-recognition marks on the membrane material, and it is impossible to guarantee the alignment mark of the membrane surface

[0010] 3. The amount of LOCA laminating glue is uncontrollable, and it is prone to glue leakage and insufficient glue, which greatly affects production efficiency

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