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US 2009/0267803 A1Published application
Scale for photoelectric encoder
AssigneeMitutoyo Corporation
InventorsAtsushi Tominaga, Takashi Kanno
Life of this patent
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Abstract
A scale for a photoelectric encoder effectively protects the base of the scale from corrosion, rust, and flaws. The scale includes a base, a light-absorbing layer including a DLC layer formed on at least one surface of the base, and light-reflecting layers with a higher reflectance than that of the light-absorbing layer with respect to light falling within a wavelength range and formed into a grating on the light-absorbing layer.
Claims19
A scale for a photoelectric encoder that detects reflection of light within a predetermined wavelength range, the scale comprising:
- a base;
- a light-absorbing layer including a DLC layer formed on at least one surface of the base;
- and
- a light-reflecting layer with a higher reflectance than a reflectance of the light-absorbing layer with respect to light falling within the predetermined wavelength range and formed into a grating on the light-absorbing layer.
1 more element
Dependencies are inferred from the claim text.