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21. 发明专利

JPS5574509A PROJECTOR 失效
公开(公告)号：JPS5574509A
公开(公告)日：1980-06-05
申请号：JP14867578
申请日：1978-12-01
申请人： CANON KK
发明人： MOCHIZUKI NORITAKA , MINAMI SETSUO , MATSUI YOSHIYA , MIDORIKAWA MITSUHIRO , TSUNODA ATSUO , MURASE HIDETOSHI , SUZUTA MIKIO , MORIWAKI MASAZUMI
IPC分类号： G03B27/50 , G02B9/08 , G02B13/24 , G02B13/26 , G02B27/18 , G03B27/32 , G03G15/04 , G03G15/047
摘要： PURPOSE:To achieve the improvement in optical performance by specifically arraying telecentric lenses. CONSTITUTION:A lens-barrel 101 applied with antireflection on its inside surface is arrayed with a lens 40 of an outside diameter equal to the inside diameter thereof and being image side telecentric and an object side telecentric lens 41, respectively coaxially and in two-array zigzag form. As a result of this, the main beam 54 from an object 50 becomes parallel to the optical axis between the lenses 40, 41 and the formed intermediate image is re-imaged on a projecting surface 55 with good efficiency without any loss in the quantity of light by the lens 41. As the same time, the effective object visual fields in the respective constituting lens systems overlap with each other in multiplicity owing to the two-array zigzag configuration, and the distributions in the configuration direction of the quantities of light integrated in the direction rectangular to the configuration direction become nearly uniform. Hence, the optical system of the uniform distribution of the quantities of light and easy adjustment is obtainable.

22. 发明专利

JPS5528038A LENS SYSTEM FOR CLOSE DISTANCE PHOTOGRAPHING 失效
公开(公告)号：JPS5528038A
公开(公告)日：1980-02-28
申请号：JP10087378
申请日：1978-08-21
申请人： NIPPON CHEMICAL IND
发明人： HAMANISHI YOSHINORI
IPC分类号： G02B9/60 , G02B9/08 , G02B9/62 , G02B13/24
摘要： PURPOSE:To let the lens system have a large diameter and have always superior imaging performance in the photographing regions from infinite far up to near distance by providing an iris between the the front group and rear group having positive refracting power. CONSTITUTION:The lens system is constituted by the front group G1 having positive refracting power, the rear group G2 likewise having poisitive refractive power and the iris provided between the both groups. And condition formulas (1), (2) are satisfied. At the focusing from an infinitely far object to a close distance object, both groups are moved to the object side while increasing air spacing between the both groups. Such change in the iris spacing enables aberrations to be corrected extremely well.

23. 发明专利

JPS54133130A PROJECTOR 失效
公开(公告)号：JPS54133130A
公开(公告)日：1979-10-16
申请号：JP4005378
申请日：1978-04-05
申请人： CANON KK
发明人： MATSUI YOSHIYA , MINAMI SETSUO , MOCHIZUKI NORITAKA
IPC分类号： G03B27/50 , G02B9/08 , G02B17/08 , G02B27/18 , G03B21/00 , G03B21/28 , G03B27/52 , G03G15/04 , H04N9/31
摘要： PURPOSE:To provide a projector of less loss of quantity of light by providing a polarizing beam splitter between an object and a lens array and providing a device of changing the deflection direction to the splitter and mirror face. CONSTITUTION:Luminous flux emitting from an object 1 is made to linearly polarized light by a polarizer 9. When the exit luminous flux is circularly polarized light, the light passing through the polarizer 9 becomes half. The linearly polarized light transmits through a 45 deg. polarization beam spliiter 2 of the vibration face equal thereto and transmits through lambda/4 plate 10 via bar lenses 3, thereby becoming circularly polarized light and converges onto a mirror 4. The image is reflected from the mirror 4, again transmits through the plate 10, thereby becoming the linearly polarized light of the vibration face orthogonal to the linearly polarized light. This is then totally reflected by the splitter 2 and converges onto image plane 5. When the exit luminous flux from the object 1 is circularly polarized light, 1/2 of the luminous flux is transmitted to the image plane 5 and may be made twice that when the exit luminous flux of the time when an ordinary semi-transparent mirror without polarization is used is transmitted to the image plane 5.

24. 发明专利

JP3753183B1 Imaging lens 有权
公开(公告)号：JP3753183B1
公开(公告)日：2006-03-08
申请号：JP2005226265
申请日：2005-08-04
申请人：株式会社エンプラス
发明人：共啓斉藤
IPC分类号： G02B9/08 , G02B13/18
CPC分类号： G02B13/003 , G02B9/06
摘要：【課題】小型軽量化および光学性能の更なる向上への要求に充分に応えることができ、製造性を向上することができる撮像レンズを提供すること。
【解決手段】物体側から、絞り２、物体側に凸面を向けた正メニスカスレンズとされた第１レンズ３、像面側に凸面を向けた正レンズとされた第２レンズ４を配設し、1.25≧L／fl≧0.8、1≧f
１／f
２＞0.55、1.8≧f
１／fl≧1、4≧f
２／fl≧1.5、1≧d
２／d
１ ≧0.5、0.27≧d
１／fl≧0.1、0.27≧d
３／fl≧0.1（Ｌ：レンズ系の全長、fl：レンズ系全体の焦点距離、f
１：第１レンズの焦点距離、f
２：第２レンズの焦点距離、d
１：第１レンズの中心厚、d
２：光軸上における第１レンズと第２レンズとの間隔、d
３：第２レンズの中心厚）を満足すること。
【選択図】図１

25. 发明专利

JP2000509515A 失效
公开(公告)号：JP2000509515A
公开(公告)日：2000-07-25
申请号：JP53928497
申请日：1997-04-28
IPC分类号： G02B9/08 , G02B13/16 , G02B13/18

26. 发明专利

JP2000035533A IMAGE PICKUP LENS 失效
公开(公告)号：JP2000035533A
公开(公告)日：2000-02-02
申请号：JP20344598
申请日：1998-07-17
申请人： SONY CORP
发明人： OKAJIMA KOJI
IPC分类号： G02B9/08 , G02B9/04 , G02B13/00 , G02B13/08 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To improve assemblability by restraining the deterioration of optical performance caused by eccentricity and also to make compensation for the various kinds of aberration excellent in an image pickup lens constituted of two lenses. SOLUTION: This lens is composed of a first lens L1 in a meniscus shape having weak refracting power, and a second lens L2 in a meniscus shape whose the convex face faces on an image surface side in order from an object side to an image surface IMG side and when (f) is defined as the focal distance of a lens entire system, f2 is defined as the focal distance of the lens L2 and nd2 is defined as the refractive index of the lens L2 on a (d) line, the respective conditions of f2/f>0.9 and nd2>1.55 are satisfied.

27. 发明专利

JPH11109221A GAUSS TYPE LENS FOR READING COLOR IMAGE 失效
公开(公告)号：JPH11109221A
公开(公告)日：1999-04-23
申请号：JP28145997
申请日：1997-09-29
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： MORI MASAO
IPC分类号： G02B9/62 , G02B9/08
摘要： PROBLEM TO BE SOLVED: To effectively compensate axial chromatic aberration in a low magnification lens and to attain high performance in a wide wavelength area by specifying a distance between lenses, the radius of curvature of a concave surface and balance between refractive power and anomalous dispersibility. SOLUTION: This Gauss type lens where 1st to 6th lenses are arranged in this order from an object side and a diaphragm is arranged between the 3rd and the 4th lenses and which is composed of six lenses is constituted to satisfy expressions I to VII. In the expressions, ν2 and ν5 mean the ν values of the 2nd and the 5th lenses to a d-line, δθ2 and δθ5 mean the anomalous dispersibility of the 2nd and the 5th lenses. R5 means the radius of curvature of the surface of the 3rd lens on an image side, R1 , R3 and R6 mean the radii of curvature of the surfaces of the 1st, the 2nd and the 4th lenses on the object side, R8 and R10 mean the radii of curvature of the surfaces of the 5th and 6th lenses on the image side. D5 means the distance between the 3rd and the 4th lenses. (f) is the focal distance of a lens entire system, ϕi is the refractive power of the i-th lens and δθi the anomalous dispersibility of the i-th lens.

28. 发明专利

JPH0432365B2 失效
公开(公告)号：JPH0432365B2
公开(公告)日：1992-05-29
申请号：JP10087378
申请日：1978-08-21
IPC分类号： G02B9/60 , G02B9/08 , G02B9/62 , G02B13/24

29. 发明专利

JPH02149812A SHUTTER WITH LENS DRIVING MECHANISM 失效
公开(公告)号：JPH02149812A
公开(公告)日：1990-06-08
申请号：JP30353088
申请日：1988-11-30
申请人： SEIKOSHA KK
发明人： AKIMOTO KAZUO , HIRAI TOSHIAKI , TANIGAWA MIYOSHI
IPC分类号： G02B9/08 , G02B7/09 , G03B7/10 , G03B9/08 , G03B13/36
摘要： PURPOSE:To simplify the structure and to decrease the number of components by providing a driving member with a distance setting means which moves a photographic lens to a focusing position by the rotation of the driving member and exposure operation areas wherein exposure operation is carried out according to the focusing position of the photographic lens. CONSTITUTION:The driving member 3 is provided with the distance setting means 6 which moves the photographic lens to the focusing position by the rotation of the driving member 3 and also provided with the exposure operation areas 3a and 3b wherein the exposure operation is performed according to the focusing position of the photographic lens. When a focusing signal is outputted from an automatic focusing device, a motor M rotates the driving member 3 and the distance setting means 6 moves the photographic lens to the focusing position. At the same time, a selector lever 4 is rotated in the exposure area of the driving member 3 and a sector mechanism is put in operation for the exposure. Consequently, the shutter is simplified in structure on the whole and the number of components is decreased.

30. 发明专利

JPS6311644B2 失效
公开(公告)号：JPS6311644B2
公开(公告)日：1988-03-15
申请号：JP4005378
申请日：1978-04-05
申请人： CANON KK
发明人： MATSUI YOSHA , MINAMI SETSUO , MOCHIZUKI NORITAKA
IPC分类号： G03B27/50 , G02B9/08 , G02B17/08 , G02B27/18 , G03B21/00 , G03B21/28 , G03B27/52 , G03G15/04 , H04N9/31

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