Page 254 - Schut Catalog

www.prenar.ee OPTICAL FLATS / PLAN PARALLEL OPTICAL FLATS

Select optical flats

Optical flats can be used for inspection of the flatness of reflecting surfaces of for example gauge
blocks, settings gauges and other lapped surfaces by optical interference.

 Flatness measuring faces: ≤ 0.10 µm. l l
 Wedge angle error: > 10.0' (optical flats, l l

double sided). L
 On request with a DAkkS certificate, L

UKAS acknowledged. A B M
 Delivery in an aluminum case. LL
optical flat L L
measuring face αα fig. 3

surface fig. 1 fig. 2
to be tested

Item No. Diameter Thickness Price EUR
mm mm

Single optical flats, single sided:

826.625 30 15
15
826.626 45 20
20
826.627 50 20

826.628 60

826.629 75

Single optical flats, double sided:

827.011 30 15
15
826.631 45 20
20
826.632 50 20

826.633 60

826.634 75 827.011

Select plan parallel optical flats

Plan parallel optical flats can be used for inspection of the parallelism and flatness of measuring
surfaces of micrometers and other measuring instruments. Each set consists of 4 sizes plan parallel
optical flats for inspection of micrometers on every fourth rotation of the spindle.

 For micrometers with a spindle pitch 826.635
of 0.5 mm.

 Sets for micrometers with a measuring range
of 0 - 25 mm, 25 - 50 mm, 50 - 75 mm and
75 - 100 mm.

 Diameter: 30 mm.
 On request with a DAkkS certificate,

UKAS acknowledged.
 Delivery in an aluminum case.

Item No. Thicknesses/mm Flatness Parallelism Price EUR
measuring faces: measuring faces:
826.635
826.636 12.00 / 12.12 / 12.25 / 12.37 ≤ 0.15 µm ≤ 0.3 µm
827.873 25.00 / 25.12 / 25.25 / 25.37 ≤ 0.15 µm ≤ 0.3 µm
827.874 50.00 / 50.12 / 50.25 / 50.37 ≤ 0.20 µm ≤ 0.5 µm
75.00 / 75.12 / 75.25 / 75.37 ≤ 0.20 µm ≤ 0.5 µm
Option:
826.630 Single plan parallel optical ≤ 0.15 µm ≤ 0.3 µm C09.314.Prenar.20240422
flat, thickness 12.00 mm

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