中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

38 records (took 0.021 seconds)

    Flash synchronization circuit for sequential firing of an array of flashbulbs
    2.
    发明授权
    Flash synchronization circuit for sequential firing of an array of flashbulbs 失效
    用于闪存阵列的顺序启动的闪速同步电路

    公开(公告)号：US3699861A

    公开(公告)日：1972-10-24

    申请号：US3699861D

    申请日：1969-07-24

    Applicant: POLAROID CORP

    Inventor： BURGARELLA JOHN P ,  ELLIN SEYMOUR

    IPC: G03B9/70 ,  H05B41/30 ,  H05B41/00

    CPC classification number: G03B9/70 ,  H05B41/30

    Abstract: In a flash synchronization circuit, an array of flashbulbs are fired sequentially in synchronism with sequential actuations of the shutter mechanism. The shutter mechanism is opened and closed by electromagnets driven by Schmitt triggers. The sequential firing of the flashbulbs is controlled in response to signals derived from the Schmitt triggers and generated by the electromagnets.

    Abstract translation: 在闪光同步电路中，闪光灯阵列与快门机构的顺序致动同步地被点燃。 快门机构由施密特触发器驱动的电磁体打开和关闭。 响应于由施密特触发器产生的信号并由电磁体产生的信号来控制闪光灯的顺序点火。

    Exposure control system
    4.
    发明授权
    Exposure control system 失效
    接触控制系统

    公开(公告)号：US3641891A

    公开(公告)日：1972-02-15

    申请号：US3641891D

    申请日：1969-06-30

    Applicant: POLAROID CORP

    Inventor： BURGARELLA JOHN P

    IPC: G03B7/087 ,  G03B7/081 ,  G03B7/28 ,  G03B9/70 ,  G03B7/08 ,  G03B7/16

    CPC classification number: G03B9/70 ,  G03B7/087

    Abstract: An exposure control system for photographic apparatus which functions automatically to regulate both exposure apertures and exposure interval. The system is operable under an exposure program wherein over a select range of light levels, aperture area is varied with respect to scene light values in a relationship less than 1:1. The system provides for sequential regulation first of aperture, then of exposure interval. Voltagesensitive triggering circuits are used for controlling the apertures and shutter mechanisms. These circuits are coupled to receive the output of a light-sensitive circuit and are arranged in series with a power source to develop a voltage reference level for use with differential amplification stages within the system. The system is calibrated or accommodating varying sensitometric characteristics of films through the use of a gain control in connection with an amplification stage. The system is capable of operating under a predetermined exposure program through the use, inter alia, of an aperture control arrangement which functionally relates aperture blade dynamics, the output of a photosensing circuit and the signal of a function generator.

    Abstract translation: 一种用于照相设备的曝光控制系统，其自动调节曝光孔径和曝光间隔。 该系统可在曝光程序下操作，其中在选择范围的光级别上，孔径面积相对于小于1:1的关系的场景光值而变化。 该系统首先提供顺序调节孔径，然后进行曝光间隔。 电压敏感触发电路用于控制孔和快门机构。 这些电路被耦合以接收光敏电路的输出并且与电源串联布置以开发用于系统内的差分放大级的电压参考电平。 该系统通过使用与放大级相关的增益控制来校准或适应膜的变化的感光特性。 该系统能够通过使用功能上涉及孔径叶片动力学，光敏电路的输出和功能发生器的信号的孔径控制装置来在预定的曝光程序下操作。

    Exposure control system with automatic adjustment for flash synchronization
    7.
    发明授权
    Exposure control system with automatic adjustment for flash synchronization 失效
    用于闪速同步的自动调整的接触控制系统

    公开(公告)号：US3659509A

    公开(公告)日：1972-05-02

    申请号：US3659509D

    申请日：1969-07-24

    Applicant: POLAROID CORP

    Inventor： BURGARELLA JOHN P

    IPC: G03B7/087 ,  G03B7/16 ,  G03B9/70 ,  G03B15/04

    CPC classification number: G03B15/04 ,  G03B7/16

    Abstract: An exposure control system incorporating an improved flash synchronization arrangement. The timing of the initiation of flash illumination relative to an exposure interval is controlled to substantially equate the quantity of scene light entering the aperture of a photographic apparatus during an exposure interval initiating period with the quantity of light entering the aperture during the corresponding period required for terminating an exposure interval. In a preferred embodiment the dynamic characteristics of a flash lamp are adjusted by follow-focus means to normalize the amount of light reaching the film plane of a camera.

    Abstract translation: 一种包含改进的闪光同步装置的曝光控制系统。 控制闪光照明相对于曝光间隔的开始的时间被控制为在曝光间隔起始时段期间进入摄影装置的孔径的场景光的量等于在所需的相应时间段期间进入光圈的光量 终止曝光间隔。 在优选实施例中，闪光灯的动态特性通过后焦点装置来调整，以使到达照相机的胶片平面的光量标准化。

    Photographic camera having backup system for automatic film speed insertion
    9.
    发明授权
    Photographic camera having backup system for automatic film speed insertion 失效
    摄影摄像机具有自动胶片速度插入的备份系统

    公开(公告)号：US3631776A

    公开(公告)日：1972-01-04

    申请号：US3631776D

    申请日：1970-01-02

    Applicant: POLAROID CORP

    Inventor： BURGARELLA JOHN P

    IPC: G03B7/08 ,  G03B7/083 ,  G03B7/22 ,  G03B7/24 ,  G03B17/50 ,  G01J1/00

    CPC classification number: G03B7/24 ,  G03B7/0807 ,  G03B7/083 ,  G03B7/22

    Abstract: A photographic camera configured to receive a film cassette which supports either thermistors or resistors having resistance values corresponding to film speed. This film speed is automatically inserted into an exposure control system with the insertion of the cassette into a camera. A backup arrangement is provided which inserts a standby resistor element into the system in the instance of an open circuit condition at the cameracassette resistor unit interface.

    Abstract translation: 一种照相机，被配置为接收支持热敏电阻或具有对应于胶片速度的电阻值的电阻的胶片盒。 将胶片速度自动插入曝光控制系统中，并将磁带插入相机。 提供了一种备用装置，其在照相机盒式电阻器单元接口处的开路状态的情况下将备用电阻元件插入系统。

Patent Agency Ranking