Optical Encoder Disc0 pages

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Properties – Aluminium Encoder Disc
Substrate
Material

4200GP, MIRO® 2

Thickness

0.5, 0.7 mm

Flatness

≤ 0.03

Optical Properties
Total light reflection

≥ 95 % (to DIN 5036-3 (U-Globe))

Diffuse light reflection

< 5 % (to DIN 5036-3)

Total light reflection

≥ 95 % (to ASTM E-1651 (TR-2))

Brightness
along

91 (to ISO 7688 (60° / calibrated 91.8))

across

91 (to ISO 7688 (60° / calibrated 91.8))

Surface Properties
Treatment (front)

brightened, anodised and PVD-coated

PVD Coating (front)

PVD AL 99.99

Iridescence Assessment (front)

Absolutely free of interference colors

Treatment (rear)

anodised

Mechanical Properties
Alloy

AL 99.9 (to DIN EN 573-3)

Hardness

Hard (to DIN EN 485-2)

Tensile strength

23,2 ~ 29,0 MPa

Yield strength

20.3 ~ 26.1 MPa

Elongation (A50)

≥2%

Deformation / Bending

≥ 1,5 x gauge of material (Bending radius)

Expansion

23.1 x 10-6 / K

Coating Layer
Material

black Ink

Thickness

1000 nm

Standard density

≥ 4.0

Customization-Capabilities
Max. resolution

1270 LPI

Bar / Window accuracy

≤ 0.003 mm

Concentricity of code track

≤ 0.005 mm

Shaping Accuracy

≤ 0.02 mm

Shaping Burrs

≤ 0.2 mm

Max Diameter

180 mm (approx.)

Function

reflective

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