Interferometry is nothing but optical interference to carry out precise measurements of very small linear dimensions. NPL Flatness Interferometer is developed by the National Physical Laboratory of the United Kingdom. We will discuss this NPL Flatness Interferometer construction and working principle with help of a schematic diagram. Construction of NPL Flatness Interferometer The NPL Flatness […]
Metrology is a science of measurement. It meant to understand the units of each quantity and the realisation of the units and calibration. In each country, they follow different unit systems, among them, the Metric system is the predominant system in the world. In this article, we have listed all the different Metrology topics that we have discussed so far.
Based upon the field of application Metrology can be further divided into
- Industrial metrology
- Scientific or Fundamental metrology
- Legal metrology
see what are these different metrology types here.
Here is the Metrology Basic Topics List!
What is an Optical flat in Interferometry?
An Optical Flat is a glass claimed to be extremely flat on one or both sides. it will be used with monochromatic light to determine the flatness of other objects with the help of optical interference. The optical flat is the popular choice for measurement using the interferometry technique, a host of other instruments, popularly […]
Solex Pneumatic Comparator
A comparator is a precision instrument used to compare the Dimensions of a given working component with the actual working standard. There are different types of comparators are available. Solex Pneumatic Comparator is coming under the Pneumatic Comparators. Let us discuss this in detail. Solex Pneumatic Comparator Solex Air Gauges Ltd. is one of the biggest and most popular pneumatic comparators […]
What is Interferometry in Metrology?
In the previous article, we have discussed what is Optical Interference, in this article we are going to discuss Interferometry in metrology. In simple words, Interferometry is nothing but the use of optical interference to carrying out precise measurements of very small linear dimensions. Let us discuss this statement in detail. Interferometry in Metrology Due […]
What is Optical Interference?
Optical Interference is an effect that can occur when two or more light beams are superimposed. We knew that a ray of light is composed of an infinite number of waves of equal wavelength. the value of the wavelength determines the colour of light. For the sake of simplicity, let us consider two waves, having […]
What is an Optical Square in Metrology?
In the previous article, we have discussed the different Optical Measurement Techniques, the first one is the Tool Maker’s Microscope, the second one is the Profile Projector, the third one is this optical square. In this article, we are going to discuss briefly Profile Projector. Optical Square An optical square is useful in turning the […]
What is Tool Maker’s Microscope in Metrology?
We generally utilize microscopes in science and medicine. It is also a metrological tool of the most fundamental importance and the greatest integrity. The Holmarc’s Tool maker’s microscope is a multi-functional measuring instrument used in metrology for inspection and measurement of miniature mechanical and electronic parts and tools. Tool maker’s microscope provides a high degree of magnification, and […]
What are the Optical Measurement Techniques in Metrology?
An Optical measurement device is made up of Optical means. We are familiar with the most common applications of optics, namely Microscopes. Chemists, Biologists and engineers use various types of microscopes. The main function of the microscope is that, for the visual magnification of small objects to a high degree with an additional provision for […]
What are the sources of errors in measurement?
Yes, it is not possible to measure the true value of an object, there will be definitely an existence of error either it can be very small (Negligible) or considerable based on application. This error can be evaluated as either an absolute error or a relative error. let’s discuss different sources of errors in measurement. This is a […]
Sine Bar – Construction, Working Principle, Uses and Formula
We have been discussed different Angular measuring Instruments so far. Sine Bar is the one of the precision Instrument among those. It will be used along with the Slip gauges in angle measurements. In this article, we are going to discuss the Construction, the working principle, Uses of Sinebar, Formula to determine the angle. Sine Bar Sine […]
Metrology Basic Topics list
Metrology is a science of measurement. It meant to understand the units of each quantity and the realisation of the units and calibration. In each country, they follow different unit systems, among them, the Metric system is the predominant system in the world. In this article, we have listed all the different Metrology topics that we have […]
What is the Universal Bevel Protractor?
Vernier Bevel Protractor is often known as the Universal Bevel Protractor. It is one of the angular measuring instrument used for close tolerances within 5 minutes. We have already discussed the Vernier Bevel protracter in previous articles. But again we just rewrote everything here instead of redirecting you to that article. Still, you can check that article […]
Working Principle of Optical Bevel Protractor
Optical Bevel Protractor is the development of the Vernier Bevel Protractor which has the ability to measure the angles up to 2 minutes. But in vernier Bevel protractor it is 5 minutes. In this article, we are going to discuss the Construction and the working principle of the Optical Bevel Protractor. Optical Bevel Protractor Optical […]
Working principle of Vernier Bevel Protractor
In Metrology, The angular measurements are frequently necessary for manufacturing industries. Vernier Bevel protractor is one of the angular measuring instrument used for close tolerances. We are going to discuss the construction and the working principle of the Vernier Bevel protractor in this article. Vernier Bevel Protractor Bevel Protractors are the Angular measuring devices. Vernier Bevel […]
What are Angular Measuring Instruments?
The angle is a measurement that we can measure between the two lines which meet at one point. Angular measurements are playing a very crucial role in measurements. The best example is that the Ships and the Aeroplanes will navigate with the help of The precise angular directions of the landing area. Let’s discuss Angular […]
What is Surface Finish and Surface Roughness?
In Mechanical Engineering Surface finish and the surface roughness, both are referred to same. But In general Surface finish referred as the overall texture of the surface and it is a combination of three factors. Those are surface roughness, Surface waviness, Lay. Little Confusion? Let’s get into the topic Make it Clear. We produce Machine elements […]
How to Calculate tolerance values for shaft or a hole?
In machine Design, each machine member will be mated with another machine member with the defined fit. There are the different type of fits available. They are Clearance Interference, Transition fits. These fits are controlled with some Tolerances and allowances according to some Standards. Actually, these tolerances values can be calculated. According to Indian Standard […]
Fundamental deviations for shaft and holes acc. Indian Standard system.
Fundamental Deviation of shaft and holes– Fundamental deviation is an allowance rather than tolerance. The allowance is simply the deviation between the hole minimum diameter to the shaft maximum diameter. Where the tolerance refer to either hole (Max. dia of hole-Min. Dia. of the hole) or shaft (Max. Dia. of the shaft- Min. Dia. of […]
What are Hole Basis System and Shaft Basis system?
Hole Basis System and Shaft Basis system – In the Machine design process there are different components that are mated together to make the machine. These components will have a different function. Base on their type of functions there must be the type of fits between the two mating components should be determined. How actually […]
What are the different types of Fits in Engineering?
Types of Fits In Engineering-In mechanical engineering, the Mating of two components is to be determined based on the function of the two components. Even though the fasteners make them tight but tightness between the two surfaces may be needed high in some applications wherein in other applications it is not required to be that […]
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