System for determining the proper exposure for a photographic surface
    1.
    发明授权
    System for determining the proper exposure for a photographic surface 失效
    用于确定摄影表面适当曝光的系统

    公开(公告)号:US3649128A

    公开(公告)日:1972-03-14

    申请号:US3649128D

    申请日:1970-11-27

    IPC分类号: G01J1/42 G01J1/44 G01J1/46

    CPC分类号: G01J1/4214 G01J1/44

    摘要: A system for determining the proper exposure for a photographic surface comprising a light sensing means for sensing the intensity of incoming illumination and converting the same to an electrical signal. Means for providing a time output signal representative of illumination conditions, and a multiplier in the circuit for multiplying the time and light signals. A read out unit is incorporated into the system for determining the proper exposure setting based on the ASA film speed used.

    摘要翻译: 一种用于确定照相表面适当曝光的系统,包括用于感测入射照明强度并将其转换为电信号的光感测装置。 提供表示照明条件的时间输出信号的装置,以及用于乘以时间和光信号的电路中的乘法器。 基于所使用的ASA胶片速度,将一个读出单元并入系统中以确定适当的曝光设置。

    Multiple stacking and spatial mapping of seismic data
    4.
    发明授权
    Multiple stacking and spatial mapping of seismic data 失效
    地震数据的多层叠和空间映射

    公开(公告)号:US4736347A

    公开(公告)日:1988-04-05

    申请号:US007490

    申请日:1987-01-28

    IPC分类号: G01V1/30 G01V1/20 G01V1/36

    CPC分类号: G01V1/303

    摘要: Seismic traces are stacked in a plurality of orthogonal measures to form multiple stacked traces at a positive offset. The stacking process determines the apparent velocities as functions of the travel time at the positive offset. The interval acoustic velocity of the first layer is then determined from knowledge of surface topography, source-receiver offset, two-way travel times and the first reflector apparent velocities. The first layer velocity information enables the incident and emergent angles of the raypaths at the surface to be calculated, as well as enabling the dip angles and spatial coordinates of the reflection points on the first reflecting boundary to be determined.Seismic data corresponding to the second reflecting boundary are then spatially mapped to the first reflecting boundary by ray tracing and by a new method for calculating the apparent velocities at the first boundary. The process is repeated for each succeedingly deeper boundary. The derived acoustic velocity model of the earth is displayed as a stacked seismic section in spatial coordinates. This process may be applied to obtain earth models and seismic sections in both two and three dimensions.

    摘要翻译: 地震迹线以多个正交测量堆叠以在正偏移处形成多个堆叠迹线。 叠加过程将视速度确定为正偏移时行程时间的函数。 然后从表面形貌,源 - 接收器偏移,双向行进时间和第一反射器表观速度的知识确定第一层的间隔声速。 第一层速度信息能够计算表面处的射线路径的入射角和出射角度,并且能够确定第一反射边界上的反射点的倾角和空间坐标。 然后通过光线跟踪和用于计算第一边界处的视在速度的新方法将对应于第二反射边界的地震数据空间映射到第一反射边界。 每个后续更深的边界重复该过程。 地球的导出声速模型以空间坐标中的堆叠地震剖面显示。 该过程可以应用于在二维和三维中获得地球模型和地震剖面。