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Biconvex lenses are simple lenses made up of two convex spherical surfaces with the same radius of curvature. Biconvex lenses, like simple lenses, have a wide range of uses, including, but not limited to, laser beam focusing and control, intermediate quality imaging, and other optical instruments. It is used in telescopes, magnifying camera lenses and in projector. However biconvex lenses are used for various purposes in daily life. In this article we will go in depth and will know more about convex lens and its uses, biconvex lens with its properties and uses.
Convex Lens Meaning
A convex lens is one that is thinner at the corners and thicker in the centre.
Lenses are often constructed of glass or transparent plastic and can be used for transmitting, refracting, or focussing light.
A convex lens is made up of a number of prisms, with the base of each prism pointing towards the centre of the lens.
Rays parallel to the primary axis are bent inwards when they travel through a convex lens.
However, this type of lens may converge a beam of light from the outside and concentrate it to a point on the opposite side. This is referred to as the focus. Moreover, the focal length of a convex lens is defined as the distance between the lens’s centre and the focus.
Convex Lens Uses
In Telescope
The telescope is used to observe objects that are very far away, such as planets in our solar system. Refracting telescopes and reflecting telescopes are the two types of telescopes. Reflecting telescopes use mirrors whereas refracting telescopes use convex lenses.
In Camera with optical zoom
Convex lenses are used in cameras to concentrate images and magnify them. We can change the magnification of the camera by adjusting the convex lens. We’re shifting the focal point to gain greater magnification with this action. Convex lenses are also used in video cameras, webcams, and other similar devices.
In Projectors
Projectors are optical devices that can display images or films on big displays. The principle underlying a projector’s operation is the amplification of the picture or video displayed on the film. The lens magnifies and inverts the picture it creates. To compensate for the inverted picture created, the film is always loaded in an inverted position.
Biconvex Lens – Definition & Meaning
A biconvex lens is a simple lens composed of two convex surfaces with the same radius of curvature in a spherical form. Another term for this type of lens is a convex-convex lens.
As a type of simple lens, the biconvex lens has a wide range of uses, including but not limited to laser beam management, focusing quality imaging, and other types of optical equipment.
A collimated or precisely parallel beam of light travels through a biconvex or Plano-convex lens and converges at a point or focus behind the lens. In this case, this lens is known as a converging or positive lens. A lens’ focal length is the distance between the lens and the point of focus.
Because the lens has a curvature on both sides, there would be roughly two focal points and two centres. The principal axis is the line that travels through the biconvex lens’s centre.
A human eye lens is the most similar example of a Biconvex lens. Light rays from objects in front of an eye must bend more sharply to bring them to the retina’s focus; light rays from distant objects require less refraction. It must be made of a highly elastic material that allows the shape to be changed, making it less or more convex. The greater the refraction, the bigger the lens’s convexity.
Formula Biconvex lens
The formula for focal length in given by:
Where f denotes the biconvex lens’s focal length.
The object distance from the biconvex lens is represented by u,
The image distance from the biconvex lens is represented by v,
Formula for refraction of the spherical surface is
Where μ1 and μ2 are the medium’s refractive indices and R1 and R2 are the radii of curvature of lens 1 and lens 2.
Uses of Biconvex Lens
These lenses can be used for a number of applications, some of which are listed below.
- Biconvex lenses are useful as magnifying or condensing lenses.
- They can also be used as magnifier
- These are used in telescopes, monoculars, microscopes, binoculars, mirrors, projectors, and other image equipment.
- In the case of a human eye, they are used to form a composite image, whereas photographic films or an optical sensor are used to generate a true image.
- These lenses can also work as a burning glass.
- A biconvex lens is a positive lens that is used to focus converging beams.
Properties of Biconvex Lenses
- Biconvex lenses always have a positive focal length.
- The focal length of a biconvex lens is short.
- The incident light can be efficiently converged using a Biconvex Lens.
- A biconvex lens can form both real and virtual images.
- Biconvex lenses are symmetrical in shape because they have equal radii on both sides.
Conclusion
Biconvex lenses are simple lenses made up of two convex spherical surfaces with the same radius of curvature. However, A convex lens is one that is thinner at the corners and thicker in the centre. A convex lens is made up of a number of prisms, with the base of each prism pointing towards the centre of the lens. However, this type of lens may converge a beam of light from the outside and concentrate it to a point on the opposite side. A biconvex lens is a simple lens composed of two convex surfaces with the same radius of curvature in a spherical form. Another term for this type of lens is a convex-convex lens. A collimated or precisely parallel beam of light travels through a biconvex or Plano-convex lens and converges at a point or focus behind the lens.
