When you pass an optician that sells eyeglasses and contact lenses, what images are usually displayed on the windowsill? Surely you will find pictures of eyes and glasses with a large size. As the name 'optics', the shop certainly provides objects intended for optical devices in the form of eyes. So what are the optical devices?
Like the eye, optical instruments are devices whose working principle is similar to vision. And optical instruments are objects which in their use require the sense of sight. In this case, there are two kinds of vision, namely direct and indirect.
Direct vision means optical tools that are owned directly by humans, namely in the form of human vision. Meanwhile, indirect vision is optical devices in the form of artificial things or man-made tools which basically have the same function as human vision devices.
Artificial optical instruments were created to facilitate human work in seeing small objects or micro-organisms that are near or even far from us. Because our eyes are limited in seeing objects that may be the size of the atom.
Optical Instruments - Understanding Optics
Talking about optical instruments must also talk about optics. Then, what is meant by optics? Optics is a word taken from Latin. The meaning of language is the appearance of a real object that is exposed to light.
In the human body itself, the eye is the five senses as well as the most important optical instrument, the eye is part of the natural optical tools that humans have. Not only from the usability element but also from the aesthetic or beauty element.
Eyes to see become a vital part of everyday human life. And from our eyes, we can see deeper into a person's personality and psyche. Beautiful eyes radiate a heart that is always kept clean. Therefore, the eyes are often referred to as the window of the heart or the window of the soul.
Natural Optical Instruments - Eyes
When it comes to natural optical instruments, the eye and its parts cannot be separated, both internally and externally. As part of the organs of the human body, the eye has its own uniqueness. Basically, the eye is sensitive to light stimuli. It is very fast in detecting the level of darkness and light in a place.
The "mother" of these optical instruments as a whole cannot be separated from the two parts of the organ, namely the internal organs and the external organs.
The shape which tends to be round and slightly flattened on the outside consists of:
1. Natural Optical Instruments - The Outer Eyes, Eyelids or Eyelids
The eyelids are part of natural optical instruments that have an important function. The protruding flexible skin layer that can open and close serves to protect the eyes from dust or dirt and sweat droplets that may enter the inside of the eye. According to this function, the eyelids are flexible.
2. Natural Optical Instruments - The Outer Eye - Eyelashes or Eyelashes
Anything attached to the human body is called hair because it does not branch. Even with the outer part of the eye which is the "mother" of natural optical instruments. Eyelashes were created by God to stick around the eye frame with a fairly important function, namely to sort out the light that may be caught by our eyes.
Try to notice if the eyes experience the power of accommodation or the power to enlarge and reduce the lens of the eye as a result of seeing light that may be too bright or tend to be dim. Eyelashes also work together.
3. Natural Optical Instruments - The Outer Eyes, Eyebrows or Eyebrow
These fine hairs that hang on our temples have the main function of preventing sweat that comes out of the pores around the forehead from falling into the internal organs of the eye. Or even water droplets from the top of our hair. The shape of the optical instruments is also unique, curved and resembles a crescent moon.
Meanwhile, there are more organs in the eye's optical apparatus. Among them:
4. Natural Optical Instruments - The Inside of the Eye, Iris
One part of the inner human natural optical apparatus is the part that is often referred to as the nature of the eye based on its color. The shape is a membrane, located just in front of the eye lens, and has a perfectly round shape.
5. Natural Optical Instruments - Inner Eye, Pupil
The inner part of the eye, which is also a category of natural optical instruments, is a circular slit formed by the iris and has a function as a regulator of the amount of light entering the eye.
6. Natural Optical Instruments - The Inside of the Eye, the Eye
Lens This convex lens, among other natural optical instruments, has the function of controlling the refraction caused by the fluid in front of the lens.
7. Natural Optical Instruments - The Inside of the Eye, Mesh Membrane
Part of the natural optical apparatus is commonly called the retina. Its function is similar to that of a screen that captures the image of a lit projector. Located behind the surface of the eye, as a container where the image of the object seen can be formed. The nature of the image formed is real, inverted and reduced.
8. Natural Optical Instruments - The Inside of the Eye, Aqueous Humor
The function of one part of the natural optical apparatus of humans is to refract light that enters the internal organs of the eye. This fluid is located at the back of the cornea.
9. Natural Optical Instruments - The Inside Of The Eye, Blind Spots
One of the many parts of the natural human optical apparatus is the part of the retina which is insensitive to light so that the image it captures will not be seen clearly or even look the same very.
10. Natural Optical Instruments - The Inside of the Eye, Cornea
This part of the natural human optical apparatus is responsible for protecting the other soft and sensitive parts of the eye. Therefore it is located on the outermost layer of the eye's internal organs. It's tough.
11. Natural Optical Instruments - The Inside of the Eye, Lens Muscle
One of the natural optical organs is also called the ciliary muscle. When the eye performs accommodation, these muscles are in charge of controlling it.
Artificial Optical Instruments
1. Optical Instruments - Lup, The Magnifying Glass
When in school when they were studying science, students were very familiar with optical instruments, one of which was a loupe or magnifying glass. Its function is to see small objects or objects. writings on a map of an area. However, this part of optical instruments has one drawback, namely that it cannot see objects much smaller than the point made by a pencil or pen.
2. Optical Instruments - Microscopes, Microorganisms Monitoring
The invention of the name for this optical instrument is based on its use, namely being able to see small or micro objects. One of these artificial optical instruments is much more focused than a loupe because it has a lens adjuster.
If the loupe can only see the smallest objects such as fingerprints, then this optical tool is able to see germs or bacteria attached to the fingerprint. Not only that, the microscope can also be used to observe viruses and blood-forming components from just one drop of blood placed on the microscope table.
Popular Optical Instruments - Camera
Who does not know the camera? One of these optical tools is not only owned by journalists but now people from various different professions can also use it. Especially now that digital cameras are mushrooming, which are easy to apply. The image formed by the camera is a real object, inverted and reduced.
Optical Instruments - Star Binoculars
This optical instrument is an optical instrument that is quite important for those who work in the field of astronomy or astrology. Its large shape and placed in one large room is the reason why the telescope can only be owned by certain people.
Like a telescope in an observatory. Its use is to observe objects located hundreds or even thousands of kilo meters from Earth. The objects observed are large objects which in
Optical Instruments - Periscope
Optical instruments can also be found in the ocean. These telescope-based optics are found in submarines. Its function is as a surveillance tool for conditions above sea water. Periscope is a long tube with two parallel mirrors positioned opposite each other at an angle of 45 degrees.
That is an article about Optical Instruments and Their Uses. Hopeefully, this article will useful for you.