It includes microscopical observation and optical interferometry observation.

The basic principles and instruments of ellipsometry, prism coupling and interferometry are introduced in the paper.

In this paper,we introduce the testing optical feature of optical fiber connector,present simply the micro-imagery and interferometry for geometrical parameters of end surface measurement,discuss detailedly the geometry test of optical fiber connector,analyze carefully the image segmentation,smoothing,binarization,computation of the geometrical parameters,pixel scaling and so on.

In order to test the thickness of lens center conveniently, this paper introduces a photoelectric instrument to measure the thickness by interference method and introduces the principle of this test method.

Research on Collimation Measurement Based on Laser Interference Technology;

In this paper,all of the electro optic coefficients of the low symmetrical crystal GdCa 4O(BO 3) 3 have been measured by the interferometric method.

In this paper,all of the piezoelectric strain eonstants of β-BaB2O4 (β-BBO) singlecrystal are measured by interferometric method in conjunction with a quasi-static d33 measurer.

In this paper,all of the electro-optic coefficients of β-BBO single crystal have been measured by the interferometric method.

Digital measurement of thickness was conducted by optical interferometry, assisted with a CCD camera to record fringes and a software package to analyze the fringes.