公开(公告)号：US4915500A

公开(公告)日：1990-04-10

申请号：US766168

申请日：1985-08-16

Applicant: Stephen E. Selkowitz

Inventor： Stephen E. Selkowitz

IPC: G01J1/04 ,  G01J1/06

CPC classification number: G01J1/04 ,  G01J1/0425 ,  G01J1/044 ,  G01J1/0266 ,  G01J1/029 ,  G01J2001/0481 ,  G01J2001/068 ,  G01N2201/084

Abstract: A multichannel optical sensing device is disclosed, for measuring the outr sky luminance or illuminance or the luminance or illuminance distribution in a room, comprising a plurality of light receptors, an optical shutter matrix including a plurality of liquid crystal optical shutter elements operable by electrical control signals between light transmitting and light stopping conditions, fiber optic elements connected between the receptors and the shutter elements, a microprocessor based programmable control unit for selectively supplying control signals to the optical shutter elements in a programmable sequence, a photodetector including an optical integrating spherical chamber having an input port for receiving the light from the shutter matrix and at least one detector element in the spherical chamber for producing output signals corresponding to the light, and output units for utilizing the output signals including a storage unit having a control connection to the microprocessor based programmable control unit for storing the output signals under the sequence control of the programmable control unit.

Abstract translation: 公开了一种多通道光学感测装置，用于测量房间中的室外天空亮度或照度或亮度或照度分布，包括多个光接收器，包括可通过电控制操作的多个液晶光学快门元件的光学快门矩阵 在光传输和光停止条件之间的信号，连接在接收器和快门元件之间的光纤元件，基于微处理器的可编程控制单元，用于以可编程序顺序向光学快门元件选择性地提供控制信号;光电检测器，包括光学积分球形腔 具有用于接收来自快门矩阵的光的输入端口和用于产生对应于光的输出信号的球形室中的至少一个检测器元件，以及用于利用包括具有到微处理器的控制连接的存储单元的输出信号的输出单元 基于可编程控制单元，用于在可编程控制单元的序列控制下存储输出信号。

公开(公告)号：US4636071A

公开(公告)日：1987-01-13

申请号：US797064

申请日：1985-11-06

Applicant: Richard S. Lowe ,  Constantine Saravanos

Inventor： Richard S. Lowe ,  Constantine Saravanos

IPC: G01J1/06 ,  G01M11/00 ,  G01N21/59 ,  G01N21/84

CPC classification number: G01M11/334 ,  G01N21/59 ,  G01J2001/068

Abstract: The fundamental-mode field radius `w` is a key parameter in characterizing optical fibers. `w` is a function of P, .theta. and .lambda. where P is the far-field power passing through a circular aperture subtending a solid angle of 2.theta. at the fiber end face and .lambda. is the center wavelength of transmitted length. `w` is derived by moving a fixed diameter aperture along an axis extending between the test fiber end surface and a photodetector so as effectively to vary .theta.. At each location the power P incident on the photodetector and the corresponding acceptance angle .theta. are measured. A microprocesor is programmed to compute from the range of measured values of .theta. and P, the value of mode field radius for a particular transmission wavelength .lambda..

Abstract translation: 基模场半径'w'是表征光纤的关键参数。 'w'是P，θ和λ的函数，其中P是通过在光纤端面处对角2θ的立体角的圆形孔的远场功率，λ是透射长度的中心波长。 通过沿着在测试光纤端表面和光电检测器之间延伸的轴线移动固定直径的孔来实现'w'，以便有效地改变θ。 在每个位置处，测量入射在光电检测器上的功率P和对应的接收角度θ。 微处理器被编程为从θ和P的测量值的范围计算特定透射波长λ的模场半径的值。