Plano mirrors
Plane mirrors are mirrors with a flat reflection surface. If an optical system can form a perfect image with random wide beam in any large space, namely, any concentric beam can still be kept as a concentric beam after passing through the system, then this system is an ideal optical system. Flat mirrors do not change the concentric nature of the light beam. They can improve the formation of the image, so flat mirrors are indispensable in an ideal optical system. Planar mirrors are suitable for interferometers, imaging systems, laser applications, collimators and other optical systems.
Concave mirrors(Convergent mirrors, Curved mirrors)
Concave mirrors are optical mirrors that bend inwards to focus light toward the inner focal point. When the parallel light shines on concave mirrors. It reflects on the focal point in front of the mirror through its reflection. The reflective surface is the concave surface. The focus is in front of optical mirrors. When the light source is in focus, the emitted light forms a parallel beam after being reflected. The imaging effect is also different, when the distance between the concave mirror and the object is different. Concave mirrors and optical lenses have many similar optical properties, especially in optical information processing, which can play an equivalent role. Concave mirrors are widely used in daily life, such as microscopes, astronomical telescopes, dentist mirrors, imaging systems, laser systems and other applications.