# Question on Optical Systems and Lenses

• phys_hep_81
In summary, the conversation was about a small lens with two lenses at the end and the question of whether a similar system could be designed for the same magnification. The speaker measured the object and image with a ruler and light source, but the results were not equal. They wondered if more advanced relations and matrix computation would be necessary due to the existence of thick lenses. However, they are not allowed to break the device and are unsure of the nature and number of lenses inside. The speaker later received new information that the device is composed of 7 lenses and will update their thread accordingly.

#### phys_hep_81

Hi everybody and very glad to be here.
I am given a small piece of lens which is tightly sealed and there are two lenses at the end and I do not know what is in between.

My question is as follow. If I design a small apparatus of object and get the image then will I be able to design a similar system that gives me the same magnification?
I measured the object and its image with simple ruler and light source and get the magnification by dividing the image length by the size of the object. Based on my poor memory in optics I was expecting to get the same ratio by dividing the distance of the object and the image but these two numbers are not equal.

Do I have to consider more advanced relations and matrix computation perhaps due to the existence of thick lenses?

Again I am not allowed to break the device and I am not sure about the nature and dimension of lenses and the number of lenses inside.

Any help and advice is greatly appreciated.

Sorry guys but I received new information about the device and it is composed of 7 lenses.
I will update my thread to the best possible delay.

## What is the purpose of an optical lens?

The purpose of an optical lens is to refract or bend light in a specific way. This can be used to create images, magnify objects, or correct vision.

## How do optical lenses work?

Optical lenses work by using the principle of refraction. When light passes through a lens, it is bent or refracted due to the difference in density between the lens material and the surrounding air. This bending of light allows for the manipulation of light rays to create images or magnify objects.

## What are the different types of optical lenses?

There are several types of optical lenses, including convex lenses, concave lenses, and compound lenses. Convex lenses are thicker in the middle and thinner at the edges, while concave lenses are thinner in the middle and thicker at the edges. Compound lenses are made up of two or more individual lenses.

## What is the difference between a converging and diverging lens?

A converging lens, also known as a convex lens, causes light rays to converge or come together. This type of lens is used to create images that appear larger than the object itself. On the other hand, a diverging lens, also known as a concave lens, causes light rays to diverge or spread apart. This type of lens is used to create images that appear smaller than the object itself.

## What are some common uses for optical systems and lenses?

Optical systems and lenses have a wide range of uses, including in cameras, microscopes, telescopes, eyeglasses, and projectors. They are also used in various industries such as medicine, astronomy, and engineering for imaging and precision measurements.