By ways of improving specification of inner rock plate of slide channel of coke transport system and construction method,the channel working life gets prolonged,maintenance work reduced.

a 2-D precision cutting focus system for high power CO2 laser is manufactured.

Based on laser propulsion thrust vector control, a thrice reflecting focus system is put forward, designed and fabricated.

But one can also evaluate the stress level with the focus system of a stepper if the instruments are not available.

This paper presented a new laser focusing system which is composed of a spatial filter and 80× focusing objective lens.

In order to control the focusing nature of incident laser beam exactly,twice reflecting laser focusing system was designed.

In this paper, Formulae for the focal spot size of gaussian bar beam with two-lens focusing system are derived by q (z ) of gaussian beam.

An Investigation on the Eccentric Adjusting Method for the Zoom System Optics;

Study of IR imaging target simulator based on zoom system;

Design of a Zoom System for Dentistry and a Rear Projection Optical System;

Analysis of dynamic characteristics of focusing system based on PZT micro-actuator;

Research on focusing system characteristics and defocusing application in laser direct writer;

With the development of photoelectric tracking system, distance focusing system should have higher focus precision, better environmental adaptability and smaller space.