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31. 发明专利

JPH02103435A APPARATUS FOR CHECKING LENS RESOLUTION 失效
公开(公告)号：JPH02103435A
公开(公告)日：1990-04-16
申请号：JP25767488
申请日：1988-10-13
申请人： FUJI PHOTO FILM CO LTD
发明人： YAMAGUCHI YUKIHIKO
IPC分类号： G01M11/00 , G01M11/02
摘要： PURPOSE:To make is possible to check resolution highly reliably by forming an expanded image through a microscope on the light receiving part of a solid- state image sensing element, and electrically processing the photoelectric signal by an operating means. CONSTITUTION:Light source lamps 10-13 project lights on corresponding transmitting type chart plates 14-16 from the rear side. At first, a lens to be checked 21 is attached to a lens holder 19. A stage 22 is coarsely moved in the direction of an optical axis 18 with a focus device 25. At this time, an operating circuit 31 receives the output signal from a solid-state image sensing element 28 and performs operation. Then each state position is finely moved, and the position of the optimum focal point is detected. The stage 22 is moved to said position. The resolution of the lens 21 is judged at the optimum focal position. Then, the photoelectric signals outputted from the solid-state image sensing elements 27-29 are stored in a memory part 37. A rotation control device 20 is operated, and the lens 21 is rotated. Said operation is sequentially repeated, and the entire surface of the lens 21 can be checked for resolution.

32. 发明专利

JPS63112827A INSPECTING METHOD FOR MAGNETIC SHEET 失效
公开(公告)号：JPS63112827A
公开(公告)日：1988-05-17
申请号：JP25463286
申请日：1986-10-28
申请人： FUJI PHOTO FILM CO LTD , FUJI MAGUNEDEISUKU KK
发明人： NAGASHIMA YASUO , SATO MASAMICHI , SOEDA HARUO , YAMAGUCHI YUKIHIKO
IPC分类号： G11B5/84
摘要： PURPOSE:To prevent a magnetic powder from re-adhering to a magnetic sheet by forming a head chip so that its side face becomes roughly vertical to the magnetic surface of the magnetic sheet, and eliminating an accumulation of the magnetic powder to its side face. CONSTITUTION:A magnetic head 21 is formed by fixing a head chip 23 to a bedplate 22. Also, the tip shape of the head chip 23 is a columnar shape by which side faces 23b, 23c of both sides of a slide-contact surface 23a which is brought into slide-contact with a magnetic sheet 14 become roughly vertical to a magnetic surface 14a of the magnetic sheet 14. In such a way, even if a magnetic powder of the magnetic sheet 14 is scraped by the head chip 23, the magnetic powder is not accumulated on its side face 23c and 23b, and accordingly, re-adhesion to the magnetic sheet 14 of the magnetic powder is not generated either.

33. 发明专利

JPS6286542A METHOD AND DEVICE FOR POLISHING FLEXIBLE MAGNETIC DISK 失效
公开(公告)号：JPS6286542A
公开(公告)日：1987-04-21
申请号：JP22632785
申请日：1985-10-11
申请人： FUJI PHOTO FILM CO LTD , FUJI MAGUNEDEISUKU KK
发明人： YAMAGUCHI YUKIHIKO
IPC分类号： G11B5/84 , B24B19/26
摘要： PURPOSE:To suppress the wear of a magnetic head almost in certifying process by polishing a magnetic disk in the same condition as a magnetic recording reproducing condition before the certifying process. CONSTITUTION:A magnetic disk pack 10 is inserted into an inner bucket 26, and a recessed part 22 is temporarily tightened at the locking claw. Next, an upper cover 28 is pushed down to a main body 24, a center core 14 is loaded to a driving shaft 32 and a disk 12 is made into a drivable condition. When the upper cover 28 is closed, into a taper hole 66 of a synchronizing plate holder 50 and a taper groove 68, balls 60 and 64 are fitted, and a synchronizing plate 62 is positioned. In such a condition, to the disk 12, a scraper 42 is contacted in the same condition as the magnetic recording reproducing condition. Namely, the disk 12 is rotated, this is shifted at the constant pitch by the scraper 42 and the shifting area of the magnetic head is searched. In such process, a fine quantity of the surface of the disk 12 is erased by an edge part 42c. Thus, the unevenness of the surface of the disk 12 and the cause of the drop-out of the dust, etc., at the time of coating the magnetic material are removed, and the wear quantity of the magnetic head in the certifying process is decreased.

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