A newly developed high efficiency high resolution,large size transmission grating spectrograph for higher collection efficiency and higher spectral resolution used in laser pro- duced plasma diagnosis is reported.

Combined with a high efficiency, high spectral resolution large size transmission grating spectrograph, the differential pump system is especially suitable for the research of the ultrashort pulsed laser gas puff target interaction.

Integral calibration for transmission grating spectrometer;

Determination of the critical exposure and the penetration depth of the photosensitive resin for Stereolithography;

Combined with the relationship between evanescent wave penetration depth and incidence angle,a new parabola taper fiber probe is put forward.

According to the relationship between the penetration depth of the evanescent wave and the incident light angle,with the inner face kf probe to the effect of the light reflection angle,a new parabola taper fiber is put forward and compared with different tape.