Under commonly circs, its optic axis and molecule long axis is accordant.
Crystals of this type, having only one optic axis, are called uniaxial crystals.
This paper describes in detail how to adjust spectrometer so as to keep a strict vertical between optic axis and rotation axis of telescope.
Methods Corneal refractive powers and the length of optic axis were measured on 277 patients with simple myopia of teenager (536 eyes).
This paper analyzes the fabric feature of optic axis of the sandstone in coalbearing series of Tonger well field in Fengfeng mining area by using of microscope.
The image of sphericity which does not located the principal optic axis is an ellipse based on pinhole model, and the image center offsets from the projection of the sphere center.
