Standard Incremental Scales0 pages
www.rsf.at
STANDARD INCREMENTAL SCALES
SPECIFICATIONS:
Allowed defects within structures:
t Defects (pinholes or chromium spots): max. Ø200 µm 0.03 mm2
t Max. number of defects: 3/1000 mm
t Min. distance between defects: 20 mm
t Not critical defects: < Ø50 µm 0.002 mm2
t One scratch with a width of < 20 µm on both sides allowed
Material:
t Selected floatglass. scratched and fractured
t Planeness: 10 µm/100 × 100 mm
t Coefficient of expansion α ≈ 8.5 × 10-6/K
t Glass-thickness: 2.0 +0/-0.2 mm
t Max. glass length: 3 300 mm
t Chippings: ≤ 0.1 mm
Allowed defects outside structures:
t Defects (pinholes or chromium spots): max. Ø300 µm 0.07 mm2
t Max. number of defects: 6/1000 mm
t Not critical defects: < Ø50 µm 0.002 mm2
t Three scratches with a width of ≤ 25 µm on both sides allowed
Grating:
t Sputtered chromium on glass
t Chromium plating thickness: > 70 nm
t Reflexion (λ = 850 – 900 nm): > 60 %
t Grating pitches: t10 : 10 µm
tt
20 : 20 µm
t Line : width ratio = 1 : 1
t Line width:t ±10 % (≤ 10 µm)
t t
±1.5 µm (> 10 µm)
t Accuracy: ≤ ±3 µm/1000 mm
t Max. grating length: 3 150 mm
On request:
t Other glass types
t Other glass-thicknesses
t Other coatings
t Other grating pitches
DIMENSIONS:
track length "L":
t
1 200 mm
t
2 400 mm
t
3 150 mm
Date10/2013, Art.Nr. 599637-02, Doc.Nr. D599637-00-A-01, Technical adjustments in reserve!
A-5121 Tarsdorf
+43 (0)6278 / 8192-0
FAX
+43 (0)6278 / 8192-79 e-mail: info@rsf.at internet: www.rsf.at
"