This webpage contains data on the reflectivity measurements of the INT secondary mirror.

Reflectivity results - INT Secondary Mirror

2021

Date

 Reflectivity
@624 nm

Scattering
@624 nm

File

Notes

 
20/07/2021
 
89.9%
 
1.6%
 
20210801_INTMs_CO2
 
First CT7 measurement of M2 recorded. Very close to fresh aluminium. 
Small underestimate due to CT7 memory fault. See top of file.

2002-2012

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes

 
10/10/2012
 

				
		
		

				
		
		

				
		
		
N/A

				
		
		

				
		
		
N/A

		
Image of M2 stripped of old coating

				
		
Aluminization of the Secondary Mirror. 
No measurements found.
		 

	




	

		
		
20/05/2012

				
		
		
12:00:00

				
		
		
9.0E-03

				
		
		
5.0E-04

				
		
		
0.8469

				
		
		
79.6

				
		
		
20120520_INT_M2

				
		
Report includes CT7 (v1) measurements and graphs. 
Difficulty measuring convex surface.
		 

	




	

		
		
25/09/2002

				
		
		
10:21:48

				
		
		
5.39E-03

				
		
		
6.37E-04

				
		
		
0.8469

				
		
		
79.609

				
		
		
INTS259.PRN