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    FOCUS DETECTOR
    31.
    发明专利
    FOCUS DETECTOR 失效

    公开(公告)号：JPH0682687A

    公开(公告)日：1994-03-25

    申请号：JP25546992

    申请日：1992-08-31

    Applicant: CANON KK

    Inventor： KOYAMA TAKASHI

    IPC: G02B7/34 ,  G03B13/02 ,  G03B13/36

    Abstract: PURPOSE:To obtain a focus detector capable of miniaturizing a whole device and detecting a focus with high accuracy by making use of an image deviation system. CONSTITUTION:A focus detecting system 101 is arranged on the image surface side of an objective lens 1, and the focus detecting system 101 is provided with a secondary optical system for forming plural light distributions as to the object image by using a luminous flux which is transmitted through the different area of the pupil of the objective lens 1 in the case of obtaining the focused state of the objective lens 1 by making use of the aforesaid focus detecting system 101, and also, the focus detecting system 101 is provided with a light receiving means 5 for detecting the relative positional relation between plural light distributions, and the secondary optical system is provided with a field lens 30 arranged near a scheduled plane for forming the image on the objective lens 1, an auxiliary field lens arranged behind the field lens 30, a pair of stops and a pair of secondary image forming lenses 4 in that order from the object side.

    PHOTOGRAPHING SYSTEM HAVING TTL VARIABLE POWER FINDER
    35.
    发明专利
    PHOTOGRAPHING SYSTEM HAVING TTL VARIABLE POWER FINDER 失效

    公开(公告)号：JPH04172333A

    公开(公告)日：1992-06-19

    申请号：JP29958790

    申请日：1990-11-05

    Applicant: CANON KK

    Inventor： KOYAMA TAKASHI

    IPC: G03B13/12

    Abstract: PURPOSE:To easily obtain the approximately same variable power ratio as that in a variable power system by constituting an elector system of a front lens group having positive refracting power and rear lens group having negative refracting power and by moving the front lens group in one body together with one lens group which constitutes a variable power system arranged in the side of an image face nearer than a photoconductive light means. CONSTITUTION:A photo-conductive light means 5 is provided ahead of a lens group 3 constituting a variable power system 101 to introduce a part of photographing beams to a finder system 103. The finder system 103 is provided with a reflection member 8 elector system 102 and ocular 13. In addition, the lens groups 10 and 11 of the elector system 102 are moved on an optical axis when the variable power 101 is varies, and the front lens group 10 is also moved together with the one lens group 3 constituting a variable power system 101 arranged in a side of an image face nearer than a photoconductive light means 5 in a body. By this constitution, a finder image can be easily observed at a approximately same variable power ratio as the ratio in the variable power system 101 while miniaturizing the whole of a photographing system.

    ELECTROPHOTOGRAPHIC SENSITIZED BODY, AND COPYING MACHINE AND FACSIMILE USING THE SAME SENSITIZED BODY
    36.
    发明专利
    ELECTROPHOTOGRAPHIC SENSITIZED BODY, AND COPYING MACHINE AND FACSIMILE USING THE SAME SENSITIZED BODY 失效

    公开(公告)号：JPH04171457A

    公开(公告)日：1992-06-18

    申请号：JP29806390

    申请日：1990-11-02

    Applicant: CANON KK

    Inventor： HIRAYAMA NORIKO ,  SAKAKIBARA TEIGO ,  KOYAMA TAKASHI ,  SAKAI KIYOSHI

    IPC: G03G5/14 ,  C08F26/06 ,  C09D4/00 ,  C09D4/02 ,  H04N1/29

    Abstract: PURPOSE:To obtain a stable potential characteristic and desirable images in all kinds of environment from low-temperature low-humidity to high-temperature high-humidity by containing a polymer or a copolymer, provided with specific unit elements, as main material in an intermediate layer. CONSTITUTION:In an electrophotographic sensitized body provided with a photosensitive layer on a conductive support body through an intermediate layer, the intermediate layer contains a polymer or a copolymer having unit elements expressed by a formula I. In the formula I, R is a hydrogen atom or a low- grade alkyl group, R is a substitutional or nonsubstitutional alkyl group, a substitutional or nonsubstitutional alkenyl group, a substitutional or nonsubstitutional aromatic ring, a substitutional or nonsubstitutional complex ring, or a substitutional or nonsubstitutional cycloalkyl group having an oxygen atom or a nitrogen atom in beta, gamma, delta positions in relation to a carbonyl group in the formula I. A stable potential characteristic is thereby displayed in all kinds of environment from low-temperature low-humidity to high-temperature high-humidity, and desirable images can be formed.

    MEASURING APPARATUS OF DISTANCE
    37.
    发明专利
    MEASURING APPARATUS OF DISTANCE 失效

    公开(公告)号：JPH0452510A

    公开(公告)日：1992-02-20

    申请号：JP16360890

    申请日：1990-06-20

    Applicant: CANON KK

    Inventor： KOYAMA TAKASHI

    IPC: G01C3/06 ,  G02B7/32 ,  G03B13/36

    Abstract: PURPOSE:To enable execution of distance measurement free from parallax by a method wherein lights from a plurality of light sources are projected through a first lens unit when ordinary distance measurement is executed, while they are projected through a second lens unit when a distance to a main subject is within a prescribed distance. CONSTITUTION:A main lens unit 4a of a projection lens 4 is adjusted in parallax in relation to an objective lens 2 of a finder in an ordinary state, light fluxes from light sources 6a to 6c are projected toward a subject through the lens unit 4a and thereby multipoint distance measurement is conducted. In the case of ordinary distance measurement, a distance-measuring operation on the basis of a light-sensing element 7d is put off. In the case of distance measurement for an object located at a short distance, on the other hand, the objective lens 2 is moved for correction in parallax in relation to an image pickup lens 1, while the distance-measuring operation on the basis of the element 7d is started. At this time, emission from the light sources 6a and 6b is prohibited. In projection, the light flux from the light source 6c is directed also to a subject 3 in proximity through a subordinate lens unit 4b. A reflected light from the subject 3 located at a short distance is led to the element 7d for proximity image pickup through a reception lens 5 and the distance to the subject 3 is measured in accordance with a triangulation algorism.

    ELECTROPHOTOGRAPHIC SENSITIVE BODY HAVING PHOTOSENSITIVE LAYER CONTAINING POLYSILANE COMPOUND
    38.
    发明专利
    ELECTROPHOTOGRAPHIC SENSITIVE BODY HAVING PHOTOSENSITIVE LAYER CONTAINING POLYSILANE COMPOUND 失效

    公开(公告)号：JPH03271748A

    公开(公告)日：1991-12-03

    申请号：JP6982690

    申请日：1990-03-22

    Applicant: CANON KK

    Inventor： ANAYAMA HIDEKI ,  KOYAMA TAKASHI ,  HASHIMOTO YUICHI ,  HIRAYAMA NORIKO ,  TANAKA HISAMI

    IPC: G03G5/14

    Abstract: PURPOSE:To enhance photosensitivity, durability, and adhesion by incorporating fine spherical silicone resin particles having an average particle diameter of 0.6-6mum in an interlayer. CONSTITUTION:A conductive layer 2, an adhesive layer 3, an electric charge generating layer 4, and a charge transfer layer 5 made of polysilane are successively laminated on a support 1 and one of the interlayers comprising the layer 2,3 contains the fine spherical silicone resin particles having an average particle diameter of 0.6-6mum to form suitable roughness on the surface of the layer 2 or 3, thus permitting adhesion adhesion between the layers 2 and 3, or 3 and 4 to be enhanced and the obtained polysilane photosensitive body to be high in sensitivity, image quality, and durability.

    ELECTROPHOTOGRAPHIC SENSITIVE BODY
    39.
    发明专利
    ELECTROPHOTOGRAPHIC SENSITIVE BODY 失效

    公开(公告)号：JPH03245154A

    公开(公告)日：1991-10-31

    申请号：JP4120390

    申请日：1990-02-23

    Applicant: CANON KK

    Inventor： HIRAYAMA NORIKO ,  KOYAMA TAKASHI ,  ANAYAMA HIDEKI ,  HASHIMOTO YUICHI ,  TANAKA HISAMI

    IPC: G03G5/05 ,  G03G5/07 ,  G03G5/14

    Abstract: PURPOSE:To enhance durability and adhesiveness of a photosensitive layer by forming a coating film containing a polysilane and conductive particles on a metallic substrate and backing it into a ceramic state to form a conductive layer. CONSTITUTION:The coat film containing the conductive particles and the polysilane is formed on a metallic substrate and backed to >= 300 deg.C into a ceramic state to form the conductive layer. The polysilane is allowed to form Si-C bonds to convert it into the ceramic superior in strength, hardness, abrasion resistance, heat resistance, and corrosion resistance but low in conductivity, therefore, it is preferred to add the fine conductive particles in order to use it for the conductive layer of the phtosensitive body. The fine conductive particles can be embodied by particles of SnO2, In2O3, TiO2 treated to enhance conductivity, and carbon, and the like or powders of Al, Cu, Fe, and the like, thus permitting high image-quality to be maintained at the time of repeated uses, high in resistance to cracking and peeling, and enhanced in adhesiveness.

    DISTANCE MEASURING DEVICE
    40.
    发明专利
    DISTANCE MEASURING DEVICE 失效

    公开(公告)号：JPH03140929A

    公开(公告)日：1991-06-14

    申请号：JP27949289

    申请日：1989-10-26

    Applicant: CANON KK

    Inventor： KOYAMA TAKASHI

    IPC: G01C3/06 ,  G02B7/28 ,  G02B7/32 ,  G03B13/36

    Abstract: PURPOSE:To make distance measurement with a decreased energy loss and has the least possible parallax even at the time of short distance photographing by selectively and effectively utilizing light sources for multipoint distance measurement. CONSTITUTION:The main lens part 4a of a projecting lens 4 is subjected to parallax adjustment to a finder 2 of an ordinary state and the luminous fluxes from the light sources 6a to 6c are projected through this main lens part 4a toward a subject, by which the multipoint measurement is executed. The computation of the distance measurement based on a photo-detecting element 7d is off in the case of ordinary distance measurement. On the other hand, the computation of the distance measurement based on a photo-detecting element 7d is started while the finder 2 makes the parallax correction to a photographic lens 1 if the subject is at a short distance. Namely, the light emission of the light sources 6b, 6c is prohibited and the light projection is executed by directing the luminous flux from the light source 6a through an auxiliary lens part 4b toward the proximity subject 3. The energy loss is lessened in this way and the distance measurement which has the least possible parallax even at the time of the short distance photographing is executed in this way.

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