Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Kogaku Kogyo Co LtdfiledCriticalAsahi Kogaku Kogyo Co Ltd
Priority to JP11317681ApriorityCriticalpatent/JPS5814809A/ja
Publication of JPS5814809ApublicationCriticalpatent/JPS5814809A/ja
Publication of JPS6131448B2publicationCriticalpatent/JPS6131448B2/ja
G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
G—PHYSICS
G02—OPTICS
G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
G02B13/00—Optical objectives specially designed for the purposes specified below
G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances