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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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 Posted: Sat Jan 11, 2014 2:03 am Post subject: Intriguing Soviet item |
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iangreenhalgh1 wrote:
http://www.ebay.co.uk/itm/Lens-/261371466494?pt=UK_Lenses_Filters_Lenses&hash=item3cdaf412fe
Anyone know what it is?
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konicamera
Joined: 03 May 2009
Posts: 746
Location: Warsaw, Poland
Expire: 2014-06-14
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| Posted: Sat Jan 11, 2014 3:35 am Post subject: Re: Intriguing Soviet item |
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konicamera wrote:
| iangreenhalgh1 wrote: |
http://www.ebay.co.uk/itm/Lens-/261371466494?pt=UK_Lenses_Filters_Lenses&hash=item3cdaf412fe
Anyone know what it is? |
The Russian inscription "пластина нижняя" means something like "bottom plate". Of course it's a translation out of context, so I have no idea what this might be a plate of.
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Sat Jan 11, 2014 2:51 pm Post subject: |
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iangreenhalgh1 wrote:
Thankyou. I agree, doesn't tell us much. I thought, being in such a nice wooden box it might be a high end item of interest to someone.
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BurstMox
Joined: 04 Dec 2011
Posts: 1998
Location: France
Expire: 2016-08-02
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| Posted: Sat Jan 11, 2014 3:13 pm Post subject: |
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BurstMox wrote:
Looks like this is the same one :
http://kiev.ko.slando.ua/obyavlenie/deshevo-plastina-nizhnyaya-gost-2923-59-b-u-ID6Da5D.html
Description is hard to translate and understand. Here is the google translate :
| Quote: |
Flat glass plate for interference measurements . Plate b / y in good condition. The plate is in a wooden box . Production of the USSR.
Plate used for checking flatness measuring surfaces of end measures , gauges , micrometers , gauges and instruments.
Flat glass plates are used to verify interference methods pritiraemosti and flatness measuring plane-parallel planes gauge blocks , gauges , instruments and tools. The plates are widely used in the tool industry, machine tools, instrumentation , engineering and many other industries . The plates are available in two types: the lower and upper . Lower (support ) of the plate used for checking pritiraemosti and flatness measuring surfaces gauge blocks , gauges , instruments and tools. The top plates are used for measuring plane-parallel gauge blocks technical interference method.
The plates are made of optical glass in the form of straight cylinders with flat end faces which are working .
Plates used for lapping them flat parallel gauge blocks with interference measurements , and also for testing the flatness measuring surfaces of end measures , calibers , micrometers , gauges and instruments.
Calibration plates produced according to GOST 8.215-76 |
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konicamera
Joined: 03 May 2009
Posts: 746
Location: Warsaw, Poland
Expire: 2014-06-14
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| Posted: Sat Jan 11, 2014 3:25 pm Post subject: |
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konicamera wrote:
| BurstMox wrote: |
Looks like this is the same one :
http://kiev.ko.slando.ua/obyavlenie/deshevo-plastina-nizhnyaya-gost-2923-59-b-u-ID6Da5D.html
Description is hard to translate and understand. Here is the google translate :
| Quote: |
Flat glass plate for interference measurements . Plate b / y in good condition. The plate is in a wooden box . Production of the USSR.
Plate used for checking flatness measuring surfaces of end measures , gauges , micrometers , gauges and instruments.
Flat glass plates are used to verify interference methods pritiraemosti and flatness measuring plane-parallel planes gauge blocks , gauges , instruments and tools. The plates are widely used in the tool industry, machine tools, instrumentation , engineering and many other industries . The plates are available in two types: the lower and upper . Lower (support ) of the plate used for checking pritiraemosti and flatness measuring surfaces gauge blocks , gauges , instruments and tools. The top plates are used for measuring plane-parallel gauge blocks technical interference method.
The plates are made of optical glass in the form of straight cylinders with flat end faces which are working .
Plates used for lapping them flat parallel gauge blocks with interference measurements , and also for testing the flatness measuring surfaces of end measures , calibers , micrometers , gauges and instruments.
Calibration plates produced according to GOST 8.215-76 |
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It would thus seem this object is a quality control device of some sort. Maybe it was used on comparator-like machines? To all the naysayers out there, here is indisputable prof that there WAS QC in the Soviet Union. 
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philslizzy
Joined: 07 Aug 2012
Posts: 4740
Location: Cheshire, England
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| Posted: Sat Jan 11, 2014 4:00 pm Post subject: |
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philslizzy wrote:
| konicamera wrote: |
It would thus seem this object is a quality control device of some sort. Maybe it was used on comparator-like machines? To all the naysayers out there, here is indisputable prof that there WAS QC in the Soviet Union. |
Ahh, but how flat is the cylinder? What QC was used to make it?
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kds315*
Joined: 12 Mar 2008
Posts: 16591
Location: Weinheim, Germany
Expire: 2021-03-09
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| Posted: Sat Jan 11, 2014 5:43 pm Post subject: Re: Intriguing Soviet item |
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kds315* wrote:
| iangreenhalgh1 wrote: |
http://www.ebay.co.uk/itm/Lens-/261371466494?pt=UK_Lenses_Filters_Lenses&hash=item3cdaf412fe
Anyone know what it is? |
It is that http://en.wikipedia.org/wiki/Optical_flat used for quality control.
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ForenSeil
Joined: 15 Apr 2011
Posts: 2726
Location: Kiel, Germany.
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| Posted: Sun Jan 12, 2014 2:30 am Post subject: |
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ForenSeil wrote:
It's especially very useful for for (re-)adjusting lenses with large physical apertures like larger telescopes 
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Last edited by ForenSeil on Sun Jan 12, 2014 3:06 pm; edited 1 time in total |
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
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| Posted: Sun Jan 12, 2014 1:49 pm Post subject: |
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iangreenhalgh1 wrote:
Thanks for the info guys.
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ZoneV
Joined: 09 Nov 2009
Posts: 1632
Location: Germany
Expire: 2011-12-02
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| Posted: Sun Jan 12, 2014 5:06 pm Post subject: |
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ZoneV wrote:
And good for checking filter quality - how flatt theye are.
for this I have such an optical flat, but from Zeiss Jena.
Monochrome light, clean filter on clean optical flat, and one sees interference pattern.
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cooltouch
Joined: 15 Jan 2009
Posts: 9098
Location: Houston, Texas
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| Posted: Sun Jan 12, 2014 8:24 pm Post subject: |
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cooltouch wrote:
I was about to say it was an optical flat but Klaus beat me to it. I find it quite interesting that optical flats can be used to check the quality of a lens or mirror optic down to the angstrom level.
1 angstrom = is a unit of length equal to 10^-10 m (one ten-billionth of a meter) or 0.1 nm.
The Soviets' QC may have been poor generally, but that was also generally not true with their optics.
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