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21. 发明专利

JP2002324423A SURFACE LIGHT SOURCE APPARATUS AND IMAGE READER 失效
公开(公告)号：JP2002324423A
公开(公告)日：2002-11-08
申请号：JP2001125395
申请日：2001-04-24
申请人： NIPPON SHEET GLASS CO LTD
发明人： AKIBA ATSUSHI , SAITO TOMIHISA
IPC分类号： G03B27/54 , F21V3/00 , F21V8/00 , F21V15/01 , F21V17/00 , F21V19/00 , F21Y101/02 , G06T1/00 , H01L33/60 , H01L33/62 , H04N1/04 , H01L33/00
摘要： PROBLEM TO BE SOLVED: To provide a labor- and time-saving assembly process, by minimizing the amount of workpieces and by eliminating turn-around of workpieces during the assembly process. SOLUTION: Three pins 15 are formed on each end face of a transparent light guide plate 11. Holes 17 that correspond to the pins 15 are formed in an LED module 12. The LED module 12 is mounted on the transparent light guide plate 11 by engagements between the pins 15 and the holes 17. The transparent light guide plate 11 equipped with the LED modules 12 is inserted into an outer frame 13 and is secured by hooks 21 formed on an outer frame 13. The outer frame 13 has recessed parts 16 to receive the LED modules 12. The LED models 12 are pressed toward the transparent light guide plate 11 by springs 18 provided on the recessed parts 16.

22. 发明专利

JPH02141709A OPTICAL FIBER LINE MONITOR 失效
公开(公告)号：JPH02141709A
公开(公告)日：1990-05-31
申请号：JP29644188
申请日：1988-11-24
申请人： NIPPON SHEET GLASS CO LTD
发明人： SAITO TOMIHISA
IPC分类号： G02B6/42 , G02B6/28
摘要： PURPOSE:To monitor a light signal even when the direction of sent light is inverted by providing optical fibers for incidence and projection on one end surface of a rod lens and a reflecting film on the opposite end surface, and providing a partially transparent part in its center and arranging a photodetecting element opposite the lens end surface. CONSTITUTION:The optical fiber 10A for incidence and optical fiber 10B for projection are connected one end surface of the rod lens 11 having nearly 1/4-pitch length, the reflecting film 13 made of an Au film, etc., is provided on the other end surface except a small circular opening as the transparent part 12, and the photodetecting element 14 is arranged in contact on the reflecting film formation surface side of the rod lens 11. Luminous flux 15 which is projected, therefore, travels in the rod lens 11 while drawing a nearly sine curve, the reflecting film 13 reflects part of the light, and the reflected light travels along a different path from the incidence path and is then converted and made incident on the optical fiber 10B for projection. Further, the light which is transmitted through the transparent part 12 is made incident on the photodetection surface 14A of the photodetecting element 14 and its reflected light does not return to the transparent part 12. Consequently, sent light beams in both directions can be detected by one photodetecting element.

23. 发明专利

JP2003087514A IMAGE READER APPARATUS, ITS LIGHT SOURCE, AND SHADING CORRECTION APPARATUS 审中-公开
公开(公告)号：JP2003087514A
公开(公告)日：2003-03-20
申请号：JP2001281120
申请日：2001-09-17
申请人： NIPPON SHEET GLASS CO LTD
发明人： SAITO TOMIHISA , FUJINO KOZO
IPC分类号： G06T1/00 , H04N1/00 , H04N1/028 , H04N1/04 , H04N1/19 , H04N1/401 , H04N1/48
摘要： PROBLEM TO BE SOLVED: To provide a light source for reading an image from a film original in an image reader apparatus using a contact image sensor. SOLUTION: An area light source 38 is provided with a light guide plate 62, and an LED device 64 is provided in the center of a side surface on the shorter side of the light guide plate. In the LED device, respective LED chips of R, G and B are mounted on the same LED package and the respective lights of R, G and B are switched and lit on. In the light guide plate 62, the bottom surface is covered with a white bottom plate 66 and four side surfaces are covered with a white case frame 68. A scattering sheet 60 is adhered to the upper surface of the white case frame 68, that is, a light emitting surface side. On the rear surface 63 of the light guide plate 62, light scattering surface are formed by a screen printing method so that a specific pattern is drawn in high- reflectance white ink.

24. 发明专利

JPH10126581A LINE LIGHTING DEVICE 失效
公开(公告)号：JPH10126581A
公开(公告)日：1998-05-15
申请号：JP10612997
申请日：1997-04-23
申请人： NIPPON SHEET GLASS CO LTD
发明人： SAITO TOMIHISA , KISHIMOTO TAKASHI , MATSUMOTO HARUO
IPC分类号： G02B6/00 , F21V8/00 , G03B27/54 , G06T1/00 , H04N1/028 , H04N1/031 , H04N1/04
摘要： PROBLEM TO BE SOLVED: To obtain an inexpensive device where uniformity of illuminance in the lengthwise direction is maintained by placing a light source to one end of a rod transparent body in the lengthwise direction, forming a rough space to the other end and forming three specific parts from the one end to the other end. SOLUTION: An area of a 1st part 11a of a light scattering pattern is gradually increased depending on a distance from an end with which a light source unit is pressed into contact. Since a center line C2 of the 1st part 11a is eccentric, one side ridge of the 1st part 11a is not spread. A virtual spread part 11d is estimated and the area is added to a pattern side ridge of the opposite side to form a new pattern, which is a 2nd part 11b. After the 2nd part 11b reaches a maximum width, a 3rd part 11c is formed as a part with a maximum width up to the other end. Let the length of the entire pattern be L and the length of the 3rd part 11c be A, then it is preferred that a relation of 1.77

25. 发明专利

JPH0313908A OPTICAL DEVICE 失效
公开(公告)号：JPH0313908A
公开(公告)日：1991-01-22
申请号：JP14913389
申请日：1989-06-12
申请人： NIPPON SHEET GLASS CO LTD
发明人： SAITO TOMIHISA
IPC分类号： G02B6/28
摘要： PURPOSE:To improve an isolation characteristic by obtaining such structure that a part of the end surface of a rod lens is obliquely cut off, the surface of the rod lens is roughed or a swollen part having the same refractive index is attached. CONSTITUTION:The second rod lens 12 has the structure that a part of the end surface of the rod lens is obliquely cut off so as to include a symmetric position by interposing an optical axis with respect to a second optical fiber 5. A part of light proceeding to a ground surface 14 is reflected on a B part. However, the direction of the reflected light is out of an original optical path by the oblique ground surface 14. Then, when the angle of the oblique ground surface 14 is set so that the light arrives at the side surface of the rod lens before arriving at a beam splitter film 3 in the second rod lens 12, the light reflected on the B part gets out at the side surface of the rod lens or it is reflected to the inside of the rod lens again and the light is not returned to the optical fibers 4 and 5. As the result, the isolation characteristic is drastically improved.

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