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US 7,011,248 B2Granted
Encoder arrangement
AssigneePWB-Ruhlatec Industrieprodukte GmbH
InventorsVittorio Tenca, Corrado Carradori
Life of this patent
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Abstract
An encoder arrangement is described, consisting of a motor with a motor shaft, on which a timing disk is secured, a signal source for producing an optical signal as well as a beam mask for shaping the optical signal. The arrangement is characterized in that the beam mask is provided with code bars having pit and land structures that have a diffraction and interference structure.
Claims5
An encoder arrangement, comprising
- a motor with a motor shaft on which a timing disk is secured,
- a signal source for generating an optical signal, as well as a beam mask for shaping the optical signal, wherein the beam mask is provided with code bars having pit and land structures having a diffraction and interference structure, wherein the beam mask is made of a polycarbonate, wherein regions between the code bars are made transparent and the pit and land structures includes thickness difference D, which satisfies the following function:
- D=L/2(n−1)
- with n=1.5 and L=wavelength of the optical signal.
1 more element
An encoder arrangement, comprising
- a motor with a motor shaft on which a timing disk is secured,
- a signal source for generating an optical signal, as well as a beam mask for shaping the optical signal, wherein the beam mask is provided with code bars having pit and land structures having a diffraction and interference structure, wherein a prismatic body is introduced into the beam path for beam deflection and beam shaping, and
- wherein the beam mask is integrated with a mask support, wherein the mask support and the signal source wherein a connecting plane is formed in a region of the beam entrance with a form-fit between a printed circuit board and the prism.
An encoder arrangement, comprising
- a motor with a motor shaft on which a timing disk is secured,
- a signal source for generating an optical signal, as well as a beam mask for shaping the optical signal, wherein the beam mask is provided with code bars having pit and land structures having a diffraction and interference structure, wherein the beam mask comprises regions between the code bars are made transparent and the pit and land structures include a thickness difference D, which satisfies the following function:
- D=L/2(n−1)
- with n=1.5 and L=wavelength of the optical signal.
1 more element
Dependencies are inferred from the claim text.