position light
3.This device can realize nobody or the illumination turn off the light automatically when being sufficient in the classroom, someone come and illumination turn on light automatically when being insufficient, how much of middleman different from position to is it light corresponding light of area to come according to classroom.
4.When the anisotropic of the tissue is concerned, the result is modified. The result is compared with the diffusion approximation and Monte Carol simulation. It is proved that the random-walk model is better consistent with Monte Carlo simulation than the diffusion approximation when the analyzed position is near the light source.
6.According to reflects the type optical fiber position transmitter theprinciple of work, the light which the photosource sends out aftertransmits the optical fiber to measure the object the surface(reflecting surface) on, the reflected light from the receive opticalfiber collection, and the transmission collection, and transmits tothe light detector transforms the electrical signal to output, thussurveys the object the displacement quantity.
8.In order to analyze the effect of aberration of amplitude and phase of laser beam on centroid position of focal spot, based on the Fraunhofer formula for light wave scaler diffraction theory, according to the definition of first order moment centroid position, the general expression of focal spot centroid position directly depending on the complex amplitude of near field is derived.
