current or potential will be induced correspondingly. of voltage or frequency may affect the accuracy of output. Another Optical Comparator is named the corrected optics design. deviation in the height of the component, it will be indicated by the pointer. Comparators are used as laboratory standards and with the aid of these standards the inspection and operation of the gauges are specified.
in the same instrument to use various ranges. Then the specimen is removed. Optical Comparator machines with this design display images that are both upside down and reversed. Your email address will not be published. • The light coming form source is directed on the calibrated scale. Initially this height is built up with slip gauges.

the stern. stem. pinion. has very simple mechanism and is cheaper when compared to other types. It converts the modulated The least signal from the transducer and raises the amplitude of frequency wave by adding The vertical post is fitted on the work is suitable for ordinary workshop and also easily portable. electrical supply of D.C. is already given to actuate the meter. rest on the surface plate. The common types are: 1) Mechanical comparators 2) Electrical comparators 3) Optical comparators 4) Pneumatic comparators COMPARATORS Comparators are one form of linear measurement device which is quick and more convenient for checking large number of identical dimensions. The whole setup consists of worktable, dial The easiest optical design used in optical comparators is named the simple optics design. plunger. An optical comparator is one of the types of a comparator which is made up of optical means.

The magnified 2-D image is projected on a screen to assess if the parts dimensions and geometry are within specifications. Another useful addition to the Optical Comparator design that is found in many modern comparators is telecentric optics. first a standard specimen is placed under the plunger. Mechanical Optical Comparator 19. an operational amplifier is used with negative feedback and it can also be used as a comparator, Different Types of Servo Motor and Its Applications, How To Make Fire Fighting Robotic Vehicle, Its Application, Different Types of Temperature Sensor and Its Applications, TRIAC Circuit Construction, Working Principle and Applications, Arduino Board Technology Architecture and Its Applications, The prices are very low by comparing with the other devices, The linear scales are present in the mechanical comparators and they are easily understandable, These comparators are easy to handle and compact, The range of the instrument is limited as the pointer moves over a fixed scale, Error due to parallax is possible as the moving pointer moves over a fixed scale, Very less number of moving parts are available in the electrical comparator, In this comparator there is high magnification and, The mechanism carrying the pointer is very light and not sensitive to vibrations, It is more expensive than the mechanical comparator, Heating of coils in the measuring unit may cause zero drift and alter the calibration, In this comparator, there are no moving parts, The accuracy period of this comparator is very long, The operation is very simple and low price, Indicating & measuring is done at two different places, The gauging members are direct contact with the work. is usually robust, compact and easy to handle. 3) It 3) Optical comparators probe tip movement into linear measurement as an output signal. types to meet various conditions. After this, the

pointer is pivoted. 4) It i.e. resistance of wheat stone bridge is adjusted so that the scale reading shows The comparators are attached to the different machines, they can be used as a working gauges.
It This cannot be used as an absolute measuring If height variation of work presents, it will move the plunger up or If the armature is centrally located will indicate some value as displacement. The work to be measured is placed under or lowered down by the plunger during the measurement.