Is the lens in the camera convex or concave?

The lens of the camera has convex lens and concave lens, which is a combination of convex lens and concave lens. The effect of overall synthesis is a convex lens. The convex lens can converge the real image to the other side of the lens to form the real image, which exposes the film or electronic photosensitive element, but concave mirror can't.

The lens in the camera is made of optical glass with different refractive indexes, and the convex lens and concave lens are made separately to combine them. Convex lens dispersion, concave lens pull-back dispersion (positive and negative effects). Therefore, the later camera lenses are all composed of convex lenses and concave lenses. For example, the Kirk lens used in Seagull 4 has two convex lenses and a concave lens in the middle (called three lenses), which is the simplest and most famous asymmetric positive lens.

Extended data:

Traditional camera imaging

1, the lens focuses the scene image on the film.

2. The photosensitizer on the chip will change with the light.

3. The changed photosensitive agent on the wafer is developed and fixed by the developer.

4. Form an image that is opposite or complementary to the scenery.

5. Is the formed image a real image?

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