Measurement of wedge angle of plate using interference of point light source;

In the new wire diameter online measurement system proposed, laser diode was used as the point light source to emit spheric waves passing through a wire.

Based on the principle that spherical ware comes from the point light source, isoclinic and isopach interference and their chart in the experiment of Michelson interferometer are discussed, emphasizing the relationship between them.

Based on the theory of Fresnel diffraction,the diffraction patterns were analyzed when the point source was placed in front of focal plane,at focal plane and behind focal plane.

The wavelength value of He-Ne Laser tends to be big when measured with pointolite non-localized interference of Michelson interferometer.

The relationship of the entrance angle and the height of the light at the illuminanted surface was used in the isotropic pointolite system.

The light distribution of pointolite, interference fringe and its characters are discussed by theory of interference of light on the condition of plate thickness being non uniform.

Random phase encoding achievement of color images under spotlight illumination;

The characteristic of this method is:under the spotlight illumination,one random phase mask and the phase factor of spherical wave are used to realize image encryption in the Fresnel domain.

The control principle of the scenery picture,that is projected by point source of light,the consist of control system hardware,implements means and the software system are introduced in bomb by optic collimator.