Is lens maker formula valid for thick lens?
Lens maker’s formula is applicable to Thin lenses and paraxial rays which subtend very small angles with the principal axis. Thick lenses and paraxial rays which subtend very small Thin lenses and for marginal rays Thick lenses and for marginal rays.
What is the difference between lens formula and lens maker’s formula?
The Lens Maker’s Formula. The focal length of a lens depends on the refractive index of the lens and the radii of curvature. The lens maker’s equation is another formula used for lenses that give us a relationship between the focal length, refractive index, and radii of curvature of the two spheres used in lenses.
What is the focal length of the lens formula?
According to the convex lens equation, 1/f = 1/v + 1/u. It relates the focal length of a lens with the distance of an object placed in front of it and the image formed of that object.
What is a lens maker’s formula?
Lens maker’s formula is the relation between the focal length of a lens to the refractive index of its material and the radii of curvature of its two surfaces. It is used by lens manufacturers to make the lenses of particular power from the glass of a given refractive index.
Why do sunglasses have zero power explain using lens makers formula?
Power of a lens arises because of the difference between the curvatures of either spherical surfaces. Since the curvatures on either side of a sunglass are of same radius, it has no power.
Why is it called lens maker formula?
It is a relation between the focal length of a lens to the refractive index of its material and the radii of curvature of its two surfaces. It is so called because it is used by lens manufacturers to make lenses of particular power from the glass of given refractive index.
Is thicker at the center as compared to its edges?
Whatever the mix of surfaces, if the lens is thicker at its center than its edges it is called a converging lens (having positive focal length). If it is thinner at its center than its edges it is called diverging (having negative focal length).
How does the lensmaker’s equation relate to the focal length?
The lensmaker’s equation relates the focal length of a simple lens with the spherical curvature of its two faces:, where and represent the radii of curvature of the lens surfaces closest to the light source (on the left) and the object (on the right).
What do you need to know about lens maker’s formula?
Lens maker’s formula relates the focal length, radii of curvature of the curved surfaces, and the refractive index of the transparent material. The formula is used to construct lenses with desired focal lengths. The formula is applicable to both types of lenses.
What is the formula for a convex lens?
For a convex lens, R 1 is positive and R 2 is negative. The lens maker formula takes the following form, The focal length of a lens, made up of glass, is 5 cm in air. What would be the focal length of the same lens in water?
How to calculate camera sensor resolution and lens focal length?
Calculate minimum sensor resolution: Knowing the field of view and smallest feature you want to detect. Select a camera: Once the camera is selected you can use the sensor size to calculate the focal length. The resolution of an image is the number of pixels in the image. This is in two dimensions; for example 640X480.
