This standard specifies a total of 360 terms on the basic optical principles and performance of microscopes, basic parts and accessories of microscopes, and basic types of microscopes. This standard applies to the formulation of standards for optical microscopes, the preparation of technical documents, the preparation of teaching materials and books and periodicals, and the translation of documents, etc. Note: In this standard, the words in square brackets [] can be omitted if there is no confusion. The words in parentheses () are interchangeable words except for explanation.