The optical system of the flame-observing tube is discussed in detail and the result of the optical system design with a turning angle prism is given in this paper.

Analyzing characteristic of the cube-corner retroreflector applied to laser straightness measurement;

By vector analysis the rectangular angle error influence on characteristics of the beam of cube-corner retroreflector;

Then,the effect on the first-harmonic nonlinearity by the polarization properties of reflected light of the cube-corner retroreflector and axial rotation in the motion direction of the measurement cube-corner retroreflector is derived.

An innovative gain module is employed to improve the performance of heat-conduct cooled asymmetric laser,which consists of a Nd∶YAG rod pumped by a semicylidrically arranged LD array,and right-angle prism as the mirror,leading to a highly stable output with a high quality.

The automatic test of Corner Cube Reflector (CCR), Roof Prism and Right-angle Prism is achieved by calculating the wavefront got from the digital phase-shifting interferometer.

Influence of beam turning error of pentagonal prism on wave-front measurement;

Effect of processed angle error of pentagonal prism on frontwave measurement;

Influences on the deflection angle of the pentagonal prism due to dithering and fabrication angles error;

Atmospheric extinction coefficient is measured with the cell,which is constructed with two same rectangular prisms,and then the visibility is decided by Koschmieder′s law.

With measuring principle that rectangular prism can con- vert the angle into the linear displacement by laser scanning.