Projector measurement standards:

A kind of measuring tools, measuring instruments or measuring system used to define, implement, maintain or regenerate one unit or one or more known physical value, through the comparison the transfer to other measuring instrument. In other words, a device can be of high accuracy and can be used as a standard called standard.

The measurement standard device commonly used can be divided into endpoint criteria, line standards, standard angle and other standard size four types.

The 1 endpoint criteria

The first standard endpoint criteria is length standard classification, which is composed of both ends of the surface distance and size standards, such as block, par, order gauge etc..

The 2 line standards

Second kinds of standard line standards is the standard length of the classification, which is composed of two scales ( indexing ) line between the distance for the dimensions of the standard, such as ruler, measuring tape, grating ruler is such, can be extended to the light gauge, micrometer, scale, and even more precise length measuring instrument, three dimensional measuring instrument etc..

3 angle standard

Third kinds of standard angle standard is the standard of length in the classification, which is composed of two intersecting lines or two intersecting the angle formed between the standards set. This standard has the angle gauge blocks, sine bar, angle encoder, rotary indexing corrector, polygon gauge etc..

4 other dimensions and shapes standard

The general size and shape standard includes a wider range, such as standard ball, roundness and surface roughness of the standard comparison sheet, profile measurement standard comparison sheet, optical plate, ring gauge, plug gauge, thread gauge, standard ball etc..