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41. 发明专利

JPH0792387A ALBADA TYPE INVERSE GALILEO FINDER 失效
公开(公告)号：JPH0792387A
公开(公告)日：1995-04-07
申请号：JP25776693
申请日：1993-09-21
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： ONO KAZUNORI
IPC分类号： G03B13/08 , G02B13/18 , G02B23/14
摘要： PURPOSE:To provide an Albada type inverse Galileo finder which can be made compact, thin, and light in weight by constituting a device of an objective lens and an ocular lens, and preventing lens thickness from being thick. CONSTITUTION:This device consists of an objective lens 1 whose pupil side face 1b is a concave with a negative refracting power and a half-coated face, and an ocular lens 2 whose pupil side face 2b is a strong convex and whose objective side face 2a is a reticle face 2a on which a visual field frame image or the like is formed. When the focal distance of the ocular lens is f2, finder total length is L, the radius of curvature of the pupil side of the objective lens is R., the radius of curvature of the pupil side of the ocular lens is R4, and an air interval between the objective lens and the ocular lens is d2, 4.0

42. 发明专利

JPH0777727A STRUCTURE OF FINDER FOR CAMERA 失效
公开(公告)号：JPH0777727A
公开(公告)日：1995-03-20
申请号：JP24874293
申请日：1993-09-09
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： TSUYUKI KAZUHIRO , ONO KAZUNORI
IPC分类号： G03B13/02 , G03B13/06 , G03B17/04
摘要： PURPOSE:To provide the structure of a finder capable of making a camera thin in structure and excellent in portability by freely moving one or both of an objective lens and an eyepiece in an optical axis direction and retracting a lens in a camera main body by the movement, thereby projecting the lens to set visibility at the time of photographing and retracting the lens at the time of nonphotographing. CONSTITUTION:A lens mount 5 is supported so as to freely slide in the direction of an optical axis S, with respect to a guiding mount 3 holding the objective lens 1 and the eyepiece 4 is held on the lens mount 5. The lens mount 5 is slid with respect to the guiding mount 3. When the interval between the objective lens 1 and the eyepiece 4 is made narrow and approximately minimum in a moving range, the eyepiece 4 is housed in the camera main body and the depth of the camera is made approximately minimum. When the interval is made wide and approximately maximum in the moving range, the eyepiece 4 is projected from the camera main body to obtain the finder of proper power without a deviation in the visibility.

43. 发明专利

JPH06258574A PHOTOGRAPHIC LENS 失效
公开(公告)号：JPH06258574A
公开(公告)日：1994-09-16
申请号：JP6917693
申请日：1993-03-05
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： ONO KAZUNORI
IPC分类号： G02B13/18 , G02B9/06
摘要： PURPOSE:To provide a photographic lens which is excellently assembled in the main body part of a film unit or a camera and small in spherical aberration and has high performance from the periphery to the center in spite of an asymmetrical lens by employing two-lens constitution for the improvement of picture quality and arranging a stop on an image field side. CONSTITUTION:A 1st lens L1 and a 2nd lens L2 are arranged from the object side and the stop D is arranged more on the image field side than the 2nd lens L2 to constitute what is called a back-end type, and, the 1st lens L1 is a positive meniscus lens and arranged having its convex surface facing the object side and the 2nd lens L2 is a positive meniscus lens having its convex surface facing the image field side by using a biconvex lens as the 2nd lens L2 or forming the 1st lens L1 of a biconvex lens. Further, an image formation plane 9 is curved so that its object side is concave.

44. 发明专利

JPH03158813A ZOOM LENS 失效
公开(公告)号：JPH03158813A
公开(公告)日：1991-07-08
申请号：JP29728389
申请日：1989-11-17
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： ONO KAZUNORI
IPC分类号： G02B13/18 , G02B15/16
摘要： PURPOSE:To reduce the outer diameter of a front lens and to reduce the weight of a zoom lens by moving a stop unitedly with a 3rd lens group along an optical axis at the time of zooming. CONSTITUTION:In the case of moving 2nd and 3rd lens groups 2, 3 along the optical axis and executing zooming from a wide angle end W to a telephoto end T, an air distance D1 between 1st and 2nd lens groups 1, 2 is increased and an air distance D2 between the 2nd and 3rd lens groups 2, 3 is reduced. At the time of said zooming, 1st and 4th lens groups 1, 4 are fixed. The stop S is arranged before or after the 3rd lens group 3 and moved unitedly with the 3rd lens group 3. Consequently, the outer diameter of the front lens can be reduced, a picture angle can be expanded and the weight of the whole lens system can be reduced.

45. 发明专利

JPH09184979A SIMPLE ZOOM LENS 失效
公开(公告)号：JPH09184979A
公开(公告)日：1997-07-15
申请号：JP35269395
申请日：1995-12-27
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： ONO KAZUNORI
IPC分类号： G02B13/18 , G02B15/16
摘要： PROBLEM TO BE SOLVED: To make a zoom lens compact and lower the manufacture cost by composing a 1st lens of a meniscus lens which has a convex surface on its image side and a 2nd lens has a large curvature concave surface on its object side, and meeting specified conditions. SOLUTION: This zoom lens is composed of the 1st lens L1 which has positive refracting index and the 2nd lens L2 which has negative refractive index in order from the object side. The 1st lens L1 is composed of a meniscus lens which has the convex surface on its image side and the 2nd lens L2 is a meniscus lens which has a concave surface of a large curvature on its object side. And, three conditional inequalities hold. (1) 0.05

46. 发明专利

JPH09127415A TWO-GROUP ZOOM LENS 失效
公开(公告)号：JPH09127415A
公开(公告)日：1997-05-16
申请号：JP31362895
申请日：1995-11-06
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： ONO KAZUNORI
IPC分类号： G02B13/18 , G02B15/14 , G02B15/16
摘要： PROBLEM TO BE SOLVED: To achieve high magnifications such as three magnifications and to improve the productivity by constituting a rear group G2 of negative, positive, and negative lenses in a compact two-group zoom lens system consisting of a positive front group G1 and the negative rear group G2 . SOLUTION: This lens system consists of the front group G1 consisting of four lenses L1 to L4 and the rear group G2 consisting of three lenses L5 to L7 . In the rear group G2 , the fifth lens L5 has aspherical faces as both faces and consists of a double concave plastic lens whose face having a higher curvature is directed to the object side on an optical axis X, and the sixth lens L6 consists of a double convex lens whose face having a higher curvature is directed to the object side, and the seventh lens L7 consists of a negative meniscus lens whose concave is directed to the object side.

47. 发明专利

JPH08334684A WIDE ANGLE LENS FOR CAMERA 失效
公开(公告)号：JPH08334684A
公开(公告)日：1996-12-17
申请号：JP15840195
申请日：1995-05-31
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： ONO KAZUNORI
IPC分类号： G02B9/04 , G02B13/18
摘要： PURPOSE: To make an optical system compact, to improve an assembling characteristic, to reduce a cost and to enhance imaging performance by adopting prefixed diaphragm two-element lens constitution and specifying the conditions for constituting the two-element lenses. CONSTITUTION: This wide angle lens is constituted by disposing, successively from an object side, a brightness diaphragm, a first lens L1 consisting of a positive or negative meniscus lens of which the convex face is directed to an object side and a second lens L2 consisting of a positive lens in this order. The wide angle lens is so constituted as to satisfy the condition equations -0.10

48. 发明专利

JPH08122902A INFORMATION IMPRINTING DEVICE OF CAMERA 失效
公开(公告)号：JPH08122902A
公开(公告)日：1996-05-17
申请号：JP27855094
申请日：1994-10-19
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： ONO KAZUNORI , ITO TORU
IPC分类号： G03B17/28 , G03B17/24
摘要： PURPOSE: To provide an information imprinting device constituted so that flare is prevented from occurring without making a condensing member large in size by biasing the center of the optical axis of an incident lens part from a shape center axis and inclining the optical path with respect to the shape center axis of the condensing member. CONSTITUTION: The information imprinting device 40 is constituted of an LED group 36 and the condensing member 28. The optical axes S1 and S2 of the incident lens parts 30a and 32a of the respective imprinting parts 30 and 32 of the condensing member 28 are biased to the LED group 36 side from the shape center axes C1 and C2 . When the LED group 36 emits light and the light is obliquely made incident on the optical axes S1 and S2 of the lens parts 30a and 32a, the incident light is obliquely transmitted with respect to the axes C1 and C2 . When it is emitted from emission parts 30b and 32b, it is emitted to be biased to the opposite side of the optical axes S1 and S2 of the lens parts 30a and 32a by interposing the axes C1 and C2 . Therefor, a gap between the optical path and a side end surface is properly secured and the flare is prevented from occurring. Besides, the width of the condensing member 28 is suppressed to be the irreducible minimum so as to contribute for making a camera compact and light in weight.

49. 发明专利

JPH07333501A BIFOCAL CHANGEOVER LENS SYSTEM 失效
公开(公告)号：JPH07333501A
公开(公告)日：1995-12-22
申请号：JP13183094
申请日：1994-06-14
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： ONO KAZUNORI
IPC分类号： G02B13/18 , G02B15/15
摘要： PURPOSE:To provide a lens system capable of mutually changing over two focal distances and perform focusing operation with a simple mechanism by composing the system with two lenses and satisfying a specific condition. CONSTITUTION:A first lens L1 having a negative refractive power and a second lens L2 having a positive refractive power are arranged in order from the object side. By fixing the first lens L3, moving the second lens L2 along the optical axis and adjusting the interval between the lenses L1, L2, the focal distance of the lens system is changed from either one of the wide-angle side and the telescopic side to the other and focusing at each focal distance is performed. Here, two conditions: 0.6

50. 发明专利

JPH07333500A ZOOM LENS OF TWO-GROUP CONSTITUTION 失效
公开(公告)号：JPH07333500A
公开(公告)日：1995-12-22
申请号：JP13182994
申请日：1994-06-14
申请人： FUJI PHOTO OPTICAL CO LTD
发明人： ONO KAZUNORI
IPC分类号： G02B13/18 , G02B15/15
摘要： PURPOSE:To obtain a zoom lens which is compact, has a simple zoom mechanism and is adequate for films with lenses and compact cameras by forming the zoom lens composed of specific two groups. CONSTITUTION:A negative first lens group G1 disposed on an object side is held fixed and only the positive second lens group G2 disposed on an image side is moved along the optical axis at the time of zooming. The zoom lens is constituted to satisfy the equation expressed by fW.beta /(1+beta ) /(1-beta ) . In the formula, fW is the focal length of the entire system at the wide angle end; fT is the focal length of the entire system at the telephoto end; beta is a zoom ratio (=fT/fW); f2 is the focal length of the second lens group G2; FN is the F-number of the entire system at the wide angle end; D is the diagonal size of the imaging plane. Then, the combined focal length f of the lens system, i.e., the focal length of the zoom lens, increases gradually and the zooming is attained when the second lens group G2 moves to the first lens group G1 side.

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