This part of ISO 9022 specifies methods of testing of optical instruments and instruments containing optical components under equivalent conditions, for their ability to resist combined contamination and solar ra-diation. "Contamination" as used in this part of ISO 9022 means the contact of optical instruments with corrosive chemical substances (hereafter called test agents).
Complete instruments or assemblies are, however, not be tested to this part of ISO 9022 except for special reasons (refer to ISO 9022-12). As a rule, rep-resentative substrates are used as specimens.
The tests described in this part of ISO 9022 are de-signed for the selection of materials and components for instruments likely to be subjected to combined contamination and solar radiation during service life, rather than for regular production control.
The purpose of testing is to investigate the resistance of an instrument, and in particular, of instrument sur-faces, coatings, or synthetic materials, to a short-time exposure to the test agents combined with solar radiation.