DIFF Subgroup
G02B 13/146 Full Title
Optical objectives specially designed for the purposes specified below (with variable magnification G02B15/00) > for use with infrared or ultraviolet radiation ( G02B13/16 take precedence)
G02B 13/146 Optical objectives specially designed for the purposes specified below (with variable magnification G02B15/00) > for use with infrared or ultraviolet radiation ( G02B13/16 take precedence)