(meteorobs) Grating correction.

[Ed Majden]

Peter:
	Thanks for the spec sheet.  I posted your item to the meteorobs  
newsgroup.  Hopefully you will get a response.  I would  correct your  
ad on astromart.  By the way, is this a reflection grating or a  
transmission grating?  I suspect it is the former as a 1200 g/mm  
transmission grating is not very efficient.  I have been looking for  
a large transmission grating for years.  You never seem to see these  
for sale.
Cheers:
Ed



On 22-Apr-08, at 10:55 AM, Peter Foukal wrote:

> Here's the spec sheet. I notice that, although blank diameter is  
> 180 mm - as
> I told you -  the ruled area is 102 x 128 mm. Sorry about that.
>
> By the way, Milton Roy has since become Richardson Instruments -  
> part of
> Newport Corp. So they still exist, but under a different name.
>
> -------------------------------------------------------
>