Identify this instrument...Deflectometer?

[TOTAL_IDIOT]

Hello, I recently acquired this instrument, and I've not been able to figure out what it is. The label says:

 

"Deflectometre JYC

Jobin Yvon [crest]

Type D2  No. 214

Paris-Arcueil"

 

It is nothing like any other deflectometer I've found in research. See photos. Some knobs offer a very very fine adjustment of the lateral and vertical angles of unit. Others change lenses. The dark one is looking forward into hole where central eyepiece unscrewed from. There also happens to be a loose ball bearing inside instrument, about 8mm.

 

Zero info on this to be found online! Hard to believe! Curious to hear feedback, thx in advance. Hope this is correct forum.

[Endy0816]

Here's their company history page:

http://www.horiba.com/us/en/scientific/about-us/horiba-jobin-yvon/history-timeline/

Didn't see that device listed, but does mention a move to Arcueil in the 30's.

[Sensei]

It reminds early version of total station theodolite. From times prior lasers and electronics.

Light from some external source goes to inside, and operator of device could see if object inside is illuminated or not. Eventually make adjustments with handles.

https://en.wikipedia.org/wiki/Theodolite

 

 

 

Edited April 15, 2019 by Sensei

[studiot]

My guess would be it is part of some pre-laser technology collimator or autocollimator system.

These have parts in common with theodolites, but are not theodolites.

 

https://www.bmisurplus.com/products/category/metrology

Edited April 15, 2019 by studiot

[LaurieAG]

On 4/16/2019 at 4:08 AM, Endy0816 said:

Here's their company history page:

http://www.horiba.com/us/en/scientific/about-us/horiba-jobin-yvon/history-timeline/

Didn't see that device listed, but does mention a move to Arcueil in the 30's.

It also mentions a Lecomte du Noüy Tensiometer in 1930 so it's probably an old style Deflectometer.

https://en.wikipedia.org/wiki/Tensiometer_(surface_tension)#Du_Noüy_ring_tensiometer

 

[Endy0816]

1 hour ago, LaurieAG said:

It also mentions a Lecomte du Noüy Tensiometer in 1930 so it's probably an old style Deflectometer.

https://en.wikipedia.org/wiki/Tensiometer_(surface_tension)#Du_Noüy_ring_tensiometer

 

I'm sure you're probably correct.

Thought it looked similar to some of the inspection equipment for the Diesel but didn't see it brought out often.