TRO+-+Secondary+mirror

The secondary mirror will be cut out from a first surface mirror that we have. The dimensions of the mirror are below.

10 inch x 8.5 inch x 15.2mm thick

The secondary has been water cut out of the sqaure first suface mirror by JB Treasure in Vauxhall road, Liverpool

Tow options included one with a 45 geree bevel the other is a 90 degree bevel. JB Treasure's machine cannot cut a 45 degree bevel so this is what has been supplied.





The image below is of the secondary mirror that has been water cut the the drawing spec DAT_M2_165_FLAT.



Offset of the secondary mirror
INformation on collimation and offset can be seen here: http://www.astrosystems.biz/BLASRINS2.pdf

The web site of the Astronomical Society of New South Wales has the following calculator: http://www.asnsw.com/info/offsetcalc.asp


The results of the calculator are given below for the TRO.