Item Requirement Requested Value/ Quality

Verification

Method

R = Revision

I = Inspection

T = Test

Large Aperture Flat mirror for LBTS

Flat. 1 Material for mirror substrate Material with activation equal or lower than Fused silica R

Flat. 2 Mirror Size * (mm)

H = 650

L = 880

X = 630

Y = 860

T- Supplier

R - Purchaser

Flat. 3 Scratch-Dig Better than 20-10 as per MIL-O-13830AT- Supplier

R - Purchaser

Flat. 4 Reflectivity >98.5% (45 degree angle of incidence and P polarization ) T

Flat. 5 Vacuum Compatibility (mbar) 0.4 J/cm^2 @800nm, for 0.4J/cm2 , 0% damage probability @800nm, for

Red area is the clear aperture of the mirror

L

H