What is Infrared Radiation (IR)?

What is Infrared Radiation (IR)?

The infrared is a section of the electromagnetic spectrum. In other words, it’s how we sense light as humans.

It has specific properties, such as wavelength and frequency. Infrared rays are pretty much just like visible light, except that they have longer wavelengths.

Things in nature are constantly emitting infrared waves. The sun emits infrared rays; plants emit infrared rays when they do photosynthesis; animals emit them too when their body temperature is high enough!

Just because you can’t see something with your own eyes doesn’t mean it’s not emitting any light at all!

What is infrared radiation? (IR)

Infrared radiation is a type of wave that has a longer wavelength and lower frequency than visible light.

When you touch a hot pan on the stove, infrared waves from your hand are detected by sensory cells in your skin which send nerve impulses to your brain for interpretation.

It is how we sense heat from objects around us.

An infrared camera is used in wildlife observations since it only detects the infrared energy emitted from an organism’s body and does not detect colors.

It has visible light of waves whose lengths vary from 400 nanometers (nm) to 700 nm. Infrared radiation wavelengths extend from 700 nm to 1 mm—well past the range of visible light.

Microwaves have even longer wavelengths, extending from 1 millimeter (mm) to 30 mm or more. On the lower end of this scale, infrared waves correspond to the radiant heat given off by fire.

Infrared radiation can be felt as heat or light (when air molecules scatter the waves) and is sometimes called infrared radiant energy.

Because of its longer wavelength, infrared rays penetrate further into objects than visible rays do.

A unique photographic film sensitive to infrared radiation allows doctors to “see” internal organs through the skin in medical uses of this technology.

Infrared cameras with lenses made only from glass with no glasses can see behind some opaque objects because they are transparent in the IR range, for example.

The most familiar source of infrared radiant energy is sunlight, which contains a great deal of it, causing our bodies to warm up when we’re outside on a sunny day.

Greenhouse gases in the atmosphere trap the sun’s infrared rays, causing the air temperature to rise.

Modern window glazing will help maintain comfortable temperatures indoors—multiple layers of glass with gas fill between them.

Infrared radiation is the heat-reflecting type of electromagnetic wave; incandescent light bulbs or subatomic particles called LEDs, which are found in most modern electronics today!

Infrared lamps for night vision cameras widen the range of wavelengths they detect to see dim objects better.

And LEDs are finding widespread use as energy-efficient lighting sources because they don’t emit much visible light but produce large amounts of infrared that get converted into heat when it hits objects.

Electric heaters, water heaters, and stoves also use artificial sources of infrared radiation.

Infrared lamps may produce the intense heat needed for industrial processes such as curing paints, treating lumber, or cooking quickly in an oven.

 Some people use infrared heating elements in clothing to keep themselves warm without bulky insulation.

Infrared radiation has other practical uses beyond simple heating;  to detect invisible ink markings on paper (such as when you sign a contract) because it is readily absorbed by many substances but reflected by others.

And astronomers use infrared telescopes—some of them orbiting Earth satellites—to see objects hidden from view because their visible light has been redshifted out of the visual to humans.

There are also applications for infrared radiation that do not involve heat. Police officers use night-vision goggles to see in the dark.

What is Infrared Radiation
A US Navy aviator uses a pair of helmet-mounted AN/AVS-6 vision goggles. The effect on the natural night vision of the eye is evident.
(Image Credit: Wikipedia)

They work by capturing IR light—, to humans—and converting it to visible light, which you can see through the goggles’ lenses.

This technology has many other uses, including navigation (for example, on airplanes or spacecraft) and inspection of heat-producing equipment like engines and power generators.

It is used well for scientific research, weather forecasting (clouds appear black in IR images), surveillance, communications, and other purposes too numerous to mention here.

What is IR range in CCTV?

Best outdoor security camera system is nearly impossible to compromise. Their powerful lenses create sharp images which will document anything an intruder does in front of them.

The infrared light ranges in CCTV cameras are listed below for your reference. The infrared covers a broad wavelength spectrum (about 700 to 1000nm, or 760-1064 THz).

The infrared cameras are sensitive only to the radiant heat emitted by objects rather than their visible light.

Infrared light range (in m) 0.5 – 550;  1 – 230;  15 – 100;  50- 80;  100 to 150;   200 to 330 ; 300, 350 , 400 , 450 and 550 (for these 5 values the image becomes monochrome).

Infrared light wavelengths (in nm) 940/750 810/690 740/690 790nm 850nm 950nm.

What is IR distance in CCTV camera?

How to calculate IR distance in a CCTV camera? It is a frequent question many people ask, especially those who are going to install the camera.

First of all, find a nearby CCTV IP address and port forwarding IP Camera. Also, they want to know how far away they can capture a clear image. 

But for this question, there is no definite answer because it depends on the light source of your CCTV camera and the sensitivity of your CCTV camera.

In human eyes, we have night vision, which allows us to see clearly in darkness or lower brightness conditions compared with daylight conditions.

In technical terms, it is called “Dark-Adaptation.” For the normal eye, the most sensitive wavelength is 550 nm – 570 nm range which is its peak spectral response.

So if you want to see clearly in the darkness, you should use light with a wavelength between 550 nm – 570 nm, that same wavelength of peak spectral response of human eyes.

IR CCTV camera price

IR range in nm. It is not easy to determine the price of a Camera, and generally, it varies depending on the CCTV camera types and specifications of the product.

Even for a single housing security system, many different security cameras are available in the market with various features.

Each will provide their best performance under certain conditions. So it is hard to conclude which one will offer a better quality picture than the others.

The price for one camera may be lower than another brand if some functions are missing, but it does not mean that its quality is inferior to other products even though they have higher prices.

You have to analyze them carefully before deciding which one you want to buy based on your needs and budget. Every model has its pros and cons.

IR distance meaning

Infrared distance is a way of measuring the distance between two or more objects, and it is between astronauts and spacecraft like the Space Shuttle, but it is also usable to see dim things.

What is Infrared Radiation
Image Credit: Wired

Some handheld devices use a laser beam that emits short pulses of infra-red radiation, which bounces off an object and returns to the device to measure its distance by calculating how long it took to reflect on the beam.

It measures the distance from a spacecraft to the moon, or police officers can also use it at night.

20m IR distance meaning

The 20m IR distance means 20m night vision with a high-sensitive 1/3″ CMOS sensor and low Lux rating.

It means that you can see up to 20 meters away in total darkness! And all for such a thing!

Infrared frequency range

The infrared frequency range is the band of frequencies greater than or equal to 10 HZ and less than 15000 GHz.

This range corresponds with the wavelength range from 700 nm (frequency = 4.28 THz) to 1 mm (frequency = 1 GHz).

This range has applications in technology, such as checking for faults in electrical circuits. For example, a “broken wire” will have a different electromagnetic signature when under high-powered infrared than it does under ultraviolet light.

A broken wire shows up as more infrared light reflected than ultraviolet light reflected since power was not conducted through it properly.

Our eyes cannot see this frequency because we only see between 790 nanometers and 380 nanometersAstroAce. But this frequency range can be seen by animals with an infrared sense.

IR wavelength range

A variety of electromagnetic waves, visible light spectrum exists. Visible light ranges from 380 nm to 770 nm, which means wavelengths between those two numbers. Human eyes can see visible light.

In addition to visible light, there are also other kinds of waves in the electromagnetic spectrum: radio waves (long wavelength and low frequency), microwaves (short wavelength and high frequency).

And infrared radiation (also short wave but with a lower frequency than microwave). IR rays are known as heat radiation. The word “infrared” comes from Latin words – infra-red – meaning “below red.”

Infrared wavelength range in micrometers

 Infrared is a part of the EM spectrum covering wavelengths from 0.75 micrometers (750 nanometers) up to 300 micrometers, which begins at the red end of the visible light spectrum.

The infrared electromagnetic spectrum covers electromagnetic waves with wavelengths between 0.01 and 1000 micrometers.

Infrared wavelengths range from 2 to 100 times larger than radio waves; all objects above the temperature of absolute zero emitted Infrared radiation, including human beings, airplanes, volcanoes, ocean steamers, etc.

You can divide it into five regions:

(1) Near IR (0.7-5)

(2) Short Wave IR (5-30)

(3) Mid Wave IR (30-100)

(4) LongWave IR (100-300)

(5) Super long wave IR (above 300)

Josephine Thomas
Josephine is a technology enthusiast and loves to explore new technologies. She has been programming since she was 12 years old and enjoys learning about the newest trends in tech. Josephine is currently studying Computer Science at Stanford University, where she has become involved with organizations such as Women in Computer Science (WCS) and Code X: The Stanford Center for Professional Development.