The ThickAIM thickness interval measuring instrument uses the laser interference principle to measure the thickness of the lens and the air gap between the lens surface without contact. The product can realize the thickness measurement of optical plate and spherical lens, the measurement of air interval and thickness of lens group, etc., and can also provide positioning support for the assembly of optical lens group. Products can be customized according to customer needs, flexible measurement stroke, larger spindle stroke, so that the product adaptation range is greatly expanded.