Lenses are important optical components, and the main types of optical lenses are flat convex lenses, flat concave lenses, biconvex lenses, biconvex lenses, and other different categories. Today, let's take a closer look at the specific differences between convex and concave lenses? Let's learn together.
Structure difference: A convex lens is a transparent body made of two surfaces ground into a spherical surface, with one surface being a convex surface and the other surface being a flat or convex lens; A concave lens is a lens or flat surface that is concave on one side and opaque on the other.
Different imaging properties: Convex lenses are used to refract imaging images, which can be positive, inverted, virtual, real, enlarged, or shrunk, and have the function of focusing light. They can concentrate parallel light at the focal point or refract the light emitted from the focal point into parallel light; A concave lens is a reflective imaging device that can form inverted reduced or enlarged real images, as well as upright enlarged virtual images, and has the effect of dispersing light beams. This also includes convex lenses, which can allow light to pass through. Instruments that use light refraction to create images follow the law of refraction. A lens is not an instrument that allows light to pass through, but rather reflects back to form an image, thus complying with the law of reflection.
The effect on light is different: convex lenses mainly concentrate light; Concave lenses mainly diverge light.
Different focal points: convex lenses have a real focal point and two focal points; A concave lens has a virtual focus.
Different uses: convex lenses are used for farsighted eyes; And concave lenses are used for myopia glasses.