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ArcticMyst Security by Avery

identify a doublet lens?

Joined
Sep 23, 2017
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can someone identify this doublet lens with all four corners raised to one side?
 

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Rivem

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Feb 16, 2016
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Identifying a lens is a lot harder than that. Maybe with more context and/or model numbers somebody could tell.

All I can see is that it's a pretty typical doublet lens that's been ground into a rectangular shape which causes the four corners you mention. Other than that, I don't know.
 
Joined
Jun 3, 2007
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What Rivem said. Looking at Edmund Optics I see two lens substrates that match color wise the lens you have. One is germanium and the other is silicon.
 
Joined
Jan 5, 2011
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What Rivem said. Looking at Edmund Optics I see two lens substrates that match color wise the lens you have. One is germanium and the other is silicon.

My guess is that the edge is black painted.

Germanium and silicon - due to a high refractive index, IR lenses are simpler, and mostly singlets. Though, who knows what is that without seeing through. :can:

OP could tell if a lens transmits light. What is a focal length. Can even try to measure radii.
 
Last edited:

Rivem

0
Joined
Feb 16, 2016
Messages
1,214
Points
83
My guess is that the edge is black painted.

Germanium and silicon - due to a high refractive index, IR lenses are simpler, and mostly singlets. Though, who knows what is that without seeing through. :can:

OP could tell if a lens transmits light. What is a focal length. Can even try to measure radii.

OP was a troll and banned accordingly, so no need.
 




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