公开(公告)号：US3589798A

公开(公告)日：1971-06-29

申请号：US3589798D

申请日：1969-03-25

Applicant: MINOLTA CAMERA KK

Inventor： OGURA TOSHINOBU

IPC: G02B13/04 ,  G02B13/00 ,  G02B9/00

CPC classification number: G02B13/04

Abstract: The present invention relates to an extreme wide angle lens system having an angle of coverage of 180* which comprises eleven lens elements including an interchangeable filter. This improved extreme wide angle lens system with sufficient light intensity has a relative aperture of up to F/2.8 with a comparatively small number of compact lens elements and the lateral aberration as well as various aberrations thereof are greatly corrected.

公开(公告)号：US3606524A

公开(公告)日：1971-09-20

申请号：US3606524D

申请日：1969-05-29

Applicant: MINOLTA CAMERA KK

Inventor： OGURA TOSHINOBU

IPC: G02B13/04 ,  G02B9/62

CPC classification number: G02B13/04

Abstract: AN INVERTED TELEPHOTO TYPE WIDE-ANGLE LENS SYSTEM USED FOR A PHOTOGRAPHIC OR CINECAMERA, WHICH IS COMPOSED OF AN AIR SPACED 6-GROUP LENS COMPRISING SEVEN OR EIGHT LENSES, AND MORE PARTICULARLY AN INVERTED TELEPHOTO TYPE WIDE-ANGLE LENS SYSTEM CAPABLE OF MAKING A GOOD IMAGE, WHICH SECOND LENS GROUP IS PROVIDED WITH A THICK LENS

INTERPOSED THEREBETWEEN IN ORDER TO DECREASE THE APERTURE OF THE SUITABLE FRONT LENS FOR CAMERAS FOR LARGE SIZE PICTURES.

公开(公告)号：US3912376A

公开(公告)日：1975-10-14

申请号：US39108873

申请日：1973-08-27

Applicant: MINOLTA CAMERA KK

Inventor： OGURA TOSHINOBU ,  OGINO SHUZI

IPC: G02B7/105 ,  G02B15/173 ,  G02B15/00

CPC classification number: G02B15/173

Abstract: A zoom lens system capable of macro-photography is provided with a lens control mechanism and consists, from the object side, of a focusing lens component, a zooming lens component, a compensating lens component and an image forming component and upon zooming, imparts to the zooming lens component and the compensating lens component mutually different movements along an optical axis. One of the zooming lens component and compensating lens component consists of a first lens group having a negative refractive power and a second lens group having a positive refractive power, with either one of the first and second lens groups being released from the control of the lens control mechanism so as to render the same stationary and the other lens being moved along the optical axis by means of the zooming lens control mechanism.

公开(公告)号：US3476028A

公开(公告)日：1969-11-04

申请号：US3476028D

申请日：1966-11-30

Applicant: MINOLTA CAMERA KK

Inventor： NAMBA YASUHIRO ,  KESSOKU KAZUO ,  FUJII TADAYOSHI ,  OGURA TOSHINOBU ,  YOSHIYAMA ICHIRO

IPC: G03B7/085 ,  G03B7/099 ,  G03B19/12 ,  G01J1/00 ,  G01J1/52

CPC classification number: G03B7/085 ,  G03B7/09971