Optical Flat Parallel Glass Plate PI-80 D=80mm USSR

Description

Optical Flat parallel glass Plate  PI-80
factory packaging.
diameter:    80 mm
height:        25 mm
made in USSR
LZOS
Lytkarino optical glass plant, Lytkarino.
Glass plate - NEW.
Glass plate - NEW. There may be slight scratches and discoloration of the plastic on the plastic packaging (due to long-term storage).
Used to assess the flatness and lapping of surfaces.
Verification results (for information and specifications).
- Deviation from the flatness of the working surface:           -0.07 μm
- Local deviations from the flatness of the working surface:  0.02 μm
* Values may vary slightly (within tolerance - by grade 2 accuracy)
or
- Tolerance of the flatness of the working surface:                0.3 interference fringe
-  Local deviations from the flatness of the working surface: 0.1 interference fringe
* Values may vary slightly (within tolerance - by grade 2 accuracy)
The PI-80 plate is made of optical glass. The shape of the plate is a straight cylinder with flat end faces that are working surfaces.
Your package will be well packaged!
Postal service. International shipping will be by registered airmail. Ukrainian postal service "UKRPOSHTA"
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