The difference and function of different types of optical lens
Release time:
2024-06-25
An optical lens is an optical element used to distribute or disperse light. It is a very widely used optical element used in imaging systems. The lens is a refractor, which may contain one or more elements, and its applications range from microscopes to lasers. In addition, the lens is also an element used in many industries, such as life sciences, imaging, industry or defense industry. Its refractive surface is two spherical (spherical part), or a spherical (spherical part) a plane transparent body. The image it has become has a real image and a virtual image. So what are the differences and functions of different types of optical lenses?
The difference and function of different types of optical lenses:
1. Plane convex lens is a lens with a positive focal length, one side is a plane mirror, one side is a spherical mirror. The plano-convex lens is the ideal choice to gather parallel light to a point, the plano-convex lens can be collimated beam converging on the back focus, can also be a point light source into a collimated beam, plano-convex lens is mainly used for monochromatic light, such as laser; this kind of lens is used to converge parallel light, or the point light source into parallel light.
2. Plane-concave lens means that one side of the lens is flat and the other side is concave. A plano-concave lens has a negative focal length, which allows the beam to diverge. Therefore, it can be used to expand the beam, project light and expand the focal length of the optical system.
3, biconvex lens means that both sides of the lens are convex, usually their curvature is equal, mainly used for converging light from a point light source or transmitting images to other optical systems. Since the object distance and the image distance are equal or approximately equal, the distortion can be minimized.
4. Biconcave lens means that both sides of the lens are concave. A biconcave lens has a negative focal length, which allows the beam to diverge. Therefore, it can be used to expand the beam, project light and expand the focal length of the optical system.
5. Meniscus lens means that one side of the lens is concave and the other side is convex. The focal length of the meniscus lens may be positive or negative. The meniscus lens can correct the phase difference, which is usually used as a corrective lens, and can also be used as a condenser of the lighting system, and the selection of the appropriate thickness can also have the effect of eliminating the chromatic aberration.
6. The achromatic lens is composed of two birefringent crystals of different materials. Because the dispersion of the two materials is different, a relatively uniform phase delay can be achieved in a wide wavelength range. Achromatic lenses can improve the effect of temperature on the lens to some extent, but another result is that they increase the sensitivity of retardation to incident angle and wavelength.
The above content is an introduction to the differences and functions of different types of optical lenses. Optical lenses are widely used in VR virtual reality, camera magnifiers, projectors, optical imaging, astronomical observation, scientific research, military industry, mobile phone external lenses, photographic lenses, telecentric lenses, infrared lenses, collimating lenses, military lenses and other high-end lenses. In optics, the image formed by the convergence of actual light rays and can be presented on the light screen is called a real image; the image formed by the convergence of reverse extension lines of light rays and cannot be presented on the light screen is called a virtual image.
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