Hi,
I need to measure the expansion/contraction of lens only. Since sometimes lens develop crack as it is holded in a Aluminium assembly. So when both expand/contract lens develop a crack in it.
I need to measure at what expansion/contraction of lens/housing this happen.
1. I am facing...
Application:
to measure the thermal strain of optical lens. Due to temperature variation the lens surface is expanding / contracting in radial direction with two extreme operating temperature. (-40C to +70C )
Optical lens is SF56A (CTE - 7.9*e-6 per Kelvin)
What to do:
I need to measure...