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Laser Distance Meter
Laser Distance Meter is a popular distance measurement device used in the construction industry. Laser Distance Meters are also known as Laser Range Finders. Earlier, ultrasonic devices were used until laser distance meters were invented. But the results with those ultrasonic devices were not accurate. Laser Distance Meters were the result of years of innovation and research. Modern construction modalities use many laser equipment for various purposes like measuring, surveying, levelling, etc. This article elaborates on Laser Distance Meters or LDMs.
What is a Laser Distance Meter?
A Laser Distance Meter or LDM is a device used for measuring the distance of an object from a given point, horizontally. Using a Laser Distance Meter, the horizontal distance of the object from a reference point is measured accurately. Accuracy in measurement of the distance is required and considered vital in some fields of work, for example, construction and architecture. The measurement of the distance between a given point and the target object should be precise and as accurate as possible. Otherwise, the errors could impact the structure being erected.
Laser Distance Meter & Its Technology
Laser Distance Meters use LASER as the fundamental technology to operate. The Laser Distance Meter produces a Laser beam through a diode, popularly known as the LED. The beam of light is powerful enough to travel quite a distance. It produces a fine beam of red light that travels the distance and touches the object and in some modern devices, returns to the meter. Thus, the measurement can be double-checked for errors. LASER technology is considered the best for measurement purposes as the powerful light or beam emitted can travel long distances before weakening and diverging. The laser beam can travel long distances without compromising on its intensity
Laser Distance Meter & It’s Working Principle
The Laser Distance Meter’s operating principle is called the “Time of Flight” principle. This principle is mainly based on the fact that light can travel consistently at a good speed in the Earth’s atmosphere. This is also called the “pulse” principle. The powerful, red beam of light travels fast, hits the target and returns to the origin in a fairly less time.
How does a Laser Distance Meter work?
The Laser Distance Meter consists of an LED that emits a powerful laser beam of light pulse that travels a distance to reach the target object and gets reflected and travels back to the meter. The time taken for the light to reach the object and the time taken to get reflected and return to the meter are compared. This comparison helps the user to get an accurate measurement of the distance. Modern Laser Distance Meters use a principle called the “Phase Shift Method” to get reliable and precise results.
Calculation of Distance using a Laser Distance Meter
The readings from the Laser Distance Meter or LDM are recorded. The distance of the target object from a particular point is calculated using the formula,
Distance = ½ * (Speed of light * Time taken)
where,
- Distance is the distance between the point of reference and the target object.
- Speed of light is the speed of the laser beam.
- Time taken is the time taken for the beam to travel the distance.
Laser Distance Meter & Its Applications
Laser Distance Meters or Laser Range Finders have a wide range of uses across the fields of engineering, sports, and military. Laser Distance Meter is used in many fields that require accurate measuring to be done. Some of the applications of the Laser Distance Meter are:
- Engineering
Engineers use Laser Distance Meters for constructing 3-dimensional plans and models for their construction. They also use LDMs in the process of the actual construction.
- Sports
Sports like Throwing events in athletics (for example, javelin, shot put, discus and hammer throws) and Golf use the Laser Range Finders for measuring distances.
- Military
Military organizations use the LDMs in most of their strategies.
- Apart from this, map makers and oceanologists use the LDMs for precision and accuracy in measurements of distance.
Laser Distance Meter & Its Advantages
The following are the major advantages of using a Laser Distance Meter:
- Reliability – The laser distance meter instrument is very reliable and provides consistent readings and there is no necessity to repeat the procedure for repeated readings.
- Accuracy and Precision – When compared to ultrasonic measuring instruments, the results of a laser distance meter are much more accurate.
- Easy to Use – The laser distance meter is very easy to set up and simple to operate.
- Lightweight – The laser distance meter instrument is very lightweight and weighs very less. The laser distance meter is thus comfortable to handle.
- Portable – Laser distance meters are small instruments that are handy and can be carried easily to many places.
- Work in a harsh environment – The laser distance meter is very resistant and can operate even in harsh environmental conditions like hilly terrains, deserts, marshlands, etc.
- Sustains climatic changes – Laser distance meters are waterproof and dustproof and can work in any climatic conditions, be it wet or dry.
Laser Distance Meter & Its Disadvantages
There are a few disadvantages to a Laser Distance Meter. There could be distortions in the reflection of the laser beam when the distance measured is more than a kilometre. The amount of distortion depends on the material of the target. Some materials aid in the distortion of the beam of light while some support the reflection as much as possible.
Top 5 Laser Distance Meters in 2021
Two versatile brands offer Laser Distance Meters in India in 2021. They are Leica and Bosch. Both Leica and Bosch offer a wide range of models of laser distance meters. They also provide a warranty and free shipping of their products. Leica laser distance meters come with a 3 years warranty, while Bosch laser distance meters come with a warranty of 6 months or 1 year warranty. Both Leica and Bosch offer additional features in their products. The main features of the laser distance meter from Leica and Bosch are:
- Dustproof
- Waterproof
- Can work in bright outdoor lighting
- Display Screen with a high resolution
- Point to Point Measurement
- Software support
The top 5 laser distance meters in 2021 are:
#1 Leica Disto X4
#2 Leica Disto X3
#3 Leica Disto S910
#4 Bosch GLM 150 C
#5 Given Laser Distance Meter JUT390B+
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