The definition of optical lenses
by:HENGXIANG
2020-11-16
Definition of optical lens: surface defect standard: according to the American military standard MIL -
O-
13830 b with two sets of figures show that the surface defect size.
For example, 40/20 (
Or 40 -
20)
The former size limit the scratch and the latter limit hemp dot size.
Line, bright road, injury, scratch called scratch.
Spots, pit points, ideas are called pitting.
When components are different areas of the surface finish requirement is different, the calculation of equivalent diameter to the area of: high surface quality requirement within the area within the equivalent diameter of area shall prevail,
Such as effective aperture area)
Outside, the surface quality requirement of low area calculation are integral components of equivalent diameter.
Below components surface quality requirement is different, in the judgement area A is in accordance with the requirements, should take the circle diameter to calculate.
While B area take the entire element diameter related tags: spherical lens manufacturers
Custom message
Related Products