Why is there a red-green curve like this on glasses when shooting glass goods in SLR shed? How to avoid it?

These glasses are polarizers, aren't they?

These colored stripes are moire stripes.

That is, the spatial frequency of CCD(CMOS) pixels is close to the spatial frequency of fringes (polarization grating or coating) in glasses, which will produce moire fringes.

Elimination methods are:

1, change the camera angle. Because the angle between the camera and the glasses will lead to moire fringes, the existing moire fringes can be eliminated or changed by slightly changing the camera angle (by rotating the camera).

2. Change the position of the camera. In addition, moire fringes can be reduced by changing the angular relationship by moving left and right or up and down.

3. change the focus. Too clear focus and height details on detail patterns may lead to moire fringes, and a slight change in focus can change the clarity, thus helping to eliminate moire fringes.