Projector convex lens can be based on the projection distance and choose the right convex lens to ensure 10 times the projection classroom. The specific method is as follows:

1.determine the projection distance. The magnification of the convex lens is related to the projection distance, so you need to determine the projection distance according to the actual need, so that you can accurately calculate the size and magnification of the required convex lens.

2: Calculate the magnification of the convex lens. According to the required projection distance and the size of the projected image, the focal length and magnification of the required convex lens can be calculated. In general, the shorter the focal length of the convex lens, the greater the magnification.

3: Choose a suitable convex lens. Factors such as the size, shape and material of the convex lens, as well as parameters such as the required magnification and focal length, need to be taken into account when choosing a convex lens. In general, you need to choose a convex lens with good quality, high light transparency and good color reproduction to ensure that the projection effect is clear, vivid and natural.

4: Install the convex lens. Install the convex lens in front of the lens of the projector and adjust the position and size of the projected image to achieve the best projection effect. At the same time, you need to pay attention to the symmetry and stability of the convex lens, so as not to affect the projection quality and life.

In short, the projector convex lens magnification method requires careful calculation and selection of the appropriate convex lens, while paying attention to the installation and adjustment to achieve the best projection effect.