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41. 发明专利

JP3452919B1 Imaging lens 有权
公开(公告)号：JP3452919B1
公开(公告)日：2003-10-06
申请号：JP2003013169
申请日：2003-01-22
申请人：マイルストーン株式会社
发明人：智堂
IPC分类号： G02B3/04 , G02B9/08 , G02B13/00 , G02B13/18
CPC分类号： G02B13/003 , G02B3/04 , G02B9/08 , G02B13/18
摘要：【要約】【課題】諸収差が良好に補正されており、かつ光学長が最大でも6 mm程度で、しかも十分なバックフォーカスが確保されている。【解決手段】物体側から像側に向かって、第1レンズ、開口絞り、第2レンズの順に配列されて構成され、
以下の条件を満たす。 0.2 ＜ | r
5 /f | ＜ 3.1 （１） 3.0 ＜ (r
5 +r
6 )/(r
5 -r
6 ）＜ 19.0 （２） 1.0 ＜ｄ / f ＜ 1.5 （３） 0.5 ＜ r
1 / r
2 ＜ 2.0 （４） 0.08＜ D
2 / f ＜ 0.1 （５）ただし、 f：レンズ全体の焦点距離r
5 ：第2レンズL2の物体側面の光軸近傍における曲率半径（軸上曲率半径） r
6 ：第2レンズL2の像側面の光軸近傍における曲率半径（軸上曲率半径） d：第1レンズL1の物体側面から像面までの距離（空気中） r
1 ：第1レンズL1の物体側面の光軸近傍における曲率半径（軸上曲率半径） r
2 ：第1レンズL1の像側面の光軸近傍における曲率半径（軸上曲率半径） D
2 ：第1レンズL1と第2レンズL2の間隔

42. 发明专利

JP2002287021A STANDARD PHOTOGRAPHIC LENS 失效
公开(公告)号：JP2002287021A
公开(公告)日：2002-10-03
申请号：JP2001093521
申请日：2001-03-28
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： ONO KAZUNORI
IPC分类号： G02B13/04 , G02B9/08 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To provide a high-performance standard photographic lens which has a wide angle than a general standard lens and has a flat image plane from the center to an off-axis peripheral view angle by employing two-group, five- element constitution composed of a front group of negative and positive lenses and a rear group of negative, positive, and negative lens across a stop and satisfying specific conditional inequalities. SOLUTION: The two-group, five-element constitution is composed of the front group I of the 1st and 2nd lenses (L1 , L2 ) and the rear group II (L3 to L5 ) of the 3rd to 5th lenses across the stop and satisfies the conditional inequalities. Namely, (1) 0.75

43. 发明专利

JPH08234096A OPTICAL SYSTEM AND CAMERA PROVIDED WITH TWO LENS ELEMENTS ASWELL AS MANUFACTURE OF CAMERA 失效
公开(公告)号：JPH08234096A
公开(公告)日：1996-09-13
申请号：JP32204695
申请日：1995-12-11
申请人： EASTMAN KODAK CO
发明人： JIYOSEFU REIMONDO BAIETORII , ARAN EDOWAADO RUISU
IPC分类号： G02B9/08 , G02B9/06 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To provide an improved lens system constituted of two lens elements and having a curved image surface. SOLUTION: This optical system 10 is used for a low-cost camera 100 having a curved image surface 109, the optical system 10 is constituted of a shutter S and two single-lens elements E1 , E2 only, and 2.0>=f1 /f2 >=1.2, where f1 indicates the focal distance of the front lens element E1 , and f2 indicates the focal distance of the rear lens element E2 . The optical system 10 has the F number lower than F/11, and a curved image practically coinciding with the curved image surface 109 of the camera 100 over the whole angular field of view of at least 65 deg. is formed by the optical system 10.

44. 发明专利

JPH0444243B2 失效
公开(公告)号：JPH0444243B2
公开(公告)日：1992-07-21
申请号：JP3662388
申请日：1988-02-19
申请人： ASAHI OPTICAL CO LTD
发明人： HIRANO HIROYUKI
IPC分类号： G02B9/08 , G02B9/18 , G02B9/56 , G02B13/20

45. 发明专利

JPH0222614A FLASH PHOTOGRAPHING SWITCHING DEVICE 失效
公开(公告)号：JPH0222614A
公开(公告)日：1990-01-25
申请号：JP17219088
申请日：1988-07-11
申请人： SEIKOSHA KK
发明人： ISHIKAWA TADASHI , TAGAMI SHIGERU , AKIMOTO KAZUO , TSUYUKI HIROTO , KAWAI MICHIO , ITO KANJI , SATO TAKAYUKI , OTORA TAKAHITO , HAYAKAWA AKIYO
IPC分类号： G03B7/097 , G02B9/08 , G03B7/17 , G03B9/08 , G03B9/70
摘要： PURPOSE:To prevent photographing error by providing a lens shutter (LS) and focal plane shutter (FPS), and automatically selecting an LS mode when the FPS exceeds the threshold speed at which the FPS is synchronized with a flash. CONSTITUTION:As an input an arithmetic means 105 uses signals from a photometry circuit 101, distance measuring circuit 102, a means 20 setting a focal length F, film sensitivity setting means 104, etc., and outputs the signals to a switching means 15. The switching means 15 selects either a program exposure operated by the LS or exposure time control operated by the FPS. In the situation where the switching means 15 is set at a FPS mode and a flashing device 17 is to be used, a judging means 16 forces a forcibly switching means 107 to set an LS mode in response to an output Q2 if the activating speed of the FPS exceeds the threshold at which the activating speed of the FPS can be synchronized with the flash of the flashing device. Thus, a correct photographing can be performed.

46. 实用新型

JPH01176823U 失效
公开(公告)号：JPH01176823U
公开(公告)日：1989-12-18
申请号：JP7194488
申请日：1988-05-31
IPC分类号： G03B3/10 , G02B7/08 , G02B7/28 , G02B9/08 , G03B9/08 , G03B13/34

47. 发明专利

JPS6440912A LENS FOR OPTICAL RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS6440912A
公开(公告)日：1989-02-13
申请号：JP19758687
申请日：1987-08-07
申请人： NIPPON SHEET GLASS CO LTD
发明人： ICHIKAWA HIROYUKI
IPC分类号： G02B13/00 , G02B9/00 , G02B9/08 , G11B7/135
摘要： PURPOSE:To enable an objective lens to function as a high numerical aperture (NA) lens when used even if the NA of the objective itself is low by converging divergent light from a lens source into not parallel light, but convergent light through a collimator lens and converging luminous flux before it is made incident on the objective. CONSTITUTION:This lens consists of two single lenses 2 and 4. The divergent light emitted by the light source 1 is incident on a 1st lens 2, and converted by this 1st lens 2 into convergent light, which is incident on a 2nd lens 4, converged by this 2nd lens 4, and focused on the recording surface 5A of a recording medium 5. Thus, the convergent light is made incident on the 2nd lens 4 and then even when the lens with effective NA is used as the 2nd lens 4, the light is converged on an information recording surface 5A with a large NA.

48. 发明专利

JPS6358411A STEPPING TYPE LENS BARREL DRIVING DEVICE 失效
公开(公告)号：JPS6358411A
公开(公告)日：1988-03-14
申请号：JP20492686
申请日：1986-08-29
申请人： CANON KK
发明人： IKUI AKIHIRO
IPC分类号： G02B3/00 , G02B7/09 , G02B9/08 , G02B9/10
摘要： PURPOSE:To perform normal extending operation by making resetting operation of a stepping type lens barrel driving mechanism before photographing and thereby releasing abnormal state even when the lens barrel is not in a regular initial state due to a shock etc. CONSTITUTION:When a current is applied to the coil 26 of a plunger 25, the plunger 25 is attracted and moved to the left and turns a reset lever 22 clockwise. A feeding claw 15 and a stopping claw 19 are turned to a position where they do not coupled with a cam ring 17. Even if the cam ring is in fed state, the cam ring 17 is returned to regular initial position, and normal photographing operation is executed. When the current to the plunger 25 is cut off, the reset lever 22, feeding claw 15 and stopping claw 19 are returned to initial positions by the energizing force of springs 24, 16, 21. Then, the current for lens barrel driving is applied to a rotor 1, and shifted to lens barrel extending operation.

49. 发明专利

JPS623214A FOCUS DETECTOR 失效
公开(公告)号：JPS623214A
公开(公告)日：1987-01-09
申请号：JP14181685
申请日：1985-06-28
申请人： CANON KK
发明人： OTAKA KEIJI
IPC分类号： G02B7/34 , G02B9/00 , G02B9/02 , G02B9/04 , G02B9/08 , G03B3/00 , G03B13/36
摘要： PURPOSE:To reduce size and to improve imaging performance by constituting at least part of a reimaging system of an optical member of a distributed index type and constituting the optical member in such a manner that the refractive index distribution thereof satisfies the specific conditions. CONSTITUTION:The reimaging system having a pupil dividing means 4 for dividing the pupil of an imaging lens to plural regions is disposed on the image plane side of an imaging lens 1. The plural secondary object images are formed from the luminous fluxes passing the pupil regions divided to a plurality of the imaging lens by the reimaging system. A photoelectric conversion measn having at least two photodetector arrays consisting of plural photodetectors is disposed near the image plane of the reimaging system. The focal position of the imaging lens is detected by the photoelectric conversion means from the relative positional relation of the plural secondary object images. At least pat of the reimaging system is constituted of the optical member of the distributed index and the optical member is so constituted that the refractive index distribution thereof satisfies the relation expressed by the equation. The remaining system which is permits the easy reduction of the size and the assembly with high accuracy and has the good optical performance is thus obtd.

50. 发明专利

JPS6125145B2 JPS6125145B2 - 失效
公开(公告)号：JPS6125145B2
公开(公告)日：1986-06-14
申请号：JP13631178
申请日：1978-11-07
申请人： Sony Corp
发明人： YAMAKAWA KYOSHI , WATANABE YOSHIMI
IPC分类号： G03B13/36 , G02B7/02 , G02B7/08 , G02B7/28 , G02B9/02 , G02B9/04 , G02B9/08 , G03B3/00 , G03B9/02 , G03B19/00 , G03B19/18 , H04N5/232

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