APPENDIXAxiolab 5 List of abbreviations ZEISS05/2019 430037-7444-001 1276 APPENDIX6.1 List of abbreviationsAC Alternating currentACR Automatic Component RecognitionAF Width across flatsB/BF BrightfieldBL Bertrand lensCSA Canadian Standards AssociationC DIC Differential Interference Contrast in circular polarized lightCGT Cover glass thicknessD/DF Darkfieldd Diameter (e.g. filter)DC Direct CurrentDIC Differential Interference ContrastDIN Deutsches Institut für Normung (German Institute for Standardization)EC European CommunityEN Euronorm (European standard)Ergo Ergonomic/ErgonomicsFL Fluorescencefoc. focusableGW Suitability for glasses wearersHDMI High Definition Multimedia InterfaceIEC International Electrotechnical CommissionIP Internal protection (through housing)ISO International Standardization OrganizationL Left (coaxial knurled knob left on mechanical stage)LED Light emitting diodeLM Light managerOSD On-screen displayPh Phase contrastphot photographicPL PlanPol PolarizationP&C Push&ClickR Right (coaxial knurled knob to right of mechanical stage)RL Reflected light