1 Subject content and application scope
This standard specifies the product classification, technical requirements, test methods, inspection rules, as well as marking, packaging, transportation and storage of the operation microscope.
This standard is applicable to operation microscopes used for microsurgery.
This standard is not applicable to monocular microscopes.
2 Normative references
GB 191 Packaging - Pictorial marking for handling of goods
GB 1720 Method of test for adhesion of paint films
GB 2828 Sampling procedures and tables for lot-by-lot inspection by attributes (Apply to inspection of successive lots or batches)
GB 2829 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
JJG 245 Verification regulation of illuminance meter
3 Product classification
3.1 The operation microscope may be classified into large objective lens operation microscope and small objective lens operation microscope.
3.1.1 For large objective lens operation microscope, the binocular optical path system shares a large objective lens.
3.1.2 For small objective lens operation microscope, the binocular optical path system is equipped with objective lenses respectively.
3.2 The operation microscope shall be composed of four basic parts: binocular microscope, lighting system, stand and electrical device, and may be configured with various corresponding devices and accessories according to different use requirements.
3.3 The value calculated using Equation (1) is preferred as the nominal focal length of the large objective lens of the operation microscope.
F=100+25?n (1)
?
Where,
F——the nominal focal length of the large objective lens, mm;
n——an integer between 0 and 12.
For small objective lens operation microscope, the distance from the center of the object plane to the apex of the first plane of the objective lens refers to the preferred value of the nominal focal length of the large objective lens.
3.4 The common magnification of operation microscope is 6×~16×.
3.5 The rotating range of cross arm of the operation microscope around the column is not less than 180°.
3.6 The eye distance of the operation microscope shall be adjustable, with the minimum value not greater than 55mm and the maximum value not less than 70mm. The main microscope of the large objective lens operation microscope shall be equipped with indication marks.
1 Subject content and application scope
2 Normative references
3 Product classification
4 Technical requirements
5 Test methods
6 Inspection rules
7 Marking, packaging, transportation and storage
