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Old 15-06-2017, 03:42 PM
Tasastro (Bill)
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Help Identifying Mirror

Hi All,

Putting this up in case someone out there might know who made this mirror I found some time ago. It is a 150mm F7, and the person I bought it from said it belonged to her father who was a very keen astronomer. He could have made it himself but I doubt this. I'm thinking it is probably commercially produced, perhaps by Astro Optical?
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  #2  
Old 15-06-2017, 04:12 PM
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torana68 (Roger)
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look for any engraved information, could be on back or sides
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Old 15-06-2017, 06:29 PM
Tasastro (Bill)
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Quote:
Originally Posted by torana68 View Post
look for any engraved information, could be on back or sides
There are no markings other than that shown on the back. I guess this probably indicates amateur production. Quality of finish is very good, the blank is ground truly circular and the back is finely ground flat. Bevelling is also very well done so I am hoping it might be a good one. However it looks like I'll have to wait for re-commissioning of my Foucault test rig to see whether its a gem or dross.
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Old 15-06-2017, 07:47 PM
Wavytone (Nick)
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The box suggests home-made, though the fact someone felt the urge to write the focal ratio and focal length on the back does suggest it was made by possibly a small-volume local shop for Astro-Optical, there were one or two at various times.
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Old 15-06-2017, 08:05 PM
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Merlin66 (Ken)
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The box is typical of the shipping boxes recommended in the 60's
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Old 16-06-2017, 08:50 AM
Tasastro (Bill)
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The box is typical of the shipping boxes recommended in the 60's
It is almost exactly to the design recommended by Texereau for transporting of mirrors.
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