BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is an exploded, perspective view showing a rotational angle detector according to a first exemplary embodiment of the present invention.
FIGS. 2A to 2C are plan views showing positional relationships of a detecting body and a light receiving device in the rotational angle detector shown in FIG. 1.
FIG. 2D is a plan view showing a positional relationship of anther detecting body and the light receiving device in the rotational angle detector shown in FIG. 1.
FIGS. 3A to 3C are views illustrating waveforms output from the light receiving device in the rotational angle detector shown in FIG. 1.
FIGS. 4A to 4C are plan views showing the positional relationships of still other detecting bodies and a light receiving device in the rotational angle detector according to the first exemplary embodiment of the invention.
FIG. 5A is a view illustrating a waveform output from the light receiving device of the rotational angle detector, which is constructed in the positional relationship shown in FIG. 4A.
FIG. 5B is a view illustrating a waveform output from the light receiving device of the rotational angle detector, which is constructed in the positional relationship shown in FIG. 4B.
FIG. 6 is an exploded, perspective view showing another rotational angle detector according to the first exemplary embodiment of the present invention.
FIG. 7 is an exploded, perspective view showing a rotational angle detector according to a second exemplary embodiment of the present invention.
FIG. 8A is a plan view showing a positional relationship of a first detecting body and a light receiving device in the rotational angle detector shown in FIG. 7.
FIG. 8B is a plan view showing a positional relationship of a second detecting body and the light receiving device in the rotational angle detector shown in FIG. 7.
FIG. 8C is a plan view showing a positional relationship of another first detecting body and the light receiving device in the rotational angle detector shown in FIG. 7.
FIG. 9A is a view illustrating a waveform output from the light receiving device in the construction shown in FIG. 8A.
FIG. 9B is a view illustrating a waveform output from the light receiving device in the construction shown in FIG. 8B.
FIG. 9C is a view illustrating a composite waveform of FIG. 9A and FIG. 9B.
FIG. 10A is a plan view showing a state, in which the first detecting body is further rotated 90° from the state shown in FIG. 8A.
FIG. 10B is a plan view showing a state, in which the first detecting body is further rotated 90° from the state shown in FIG. 8B.
FIG. 11A is a view illustrating a waveform output from the light receiving device in the state shown in FIG. 10A.
FIG. 11B is a view illustrating a waveform output from the light receiving device in the state shown in FIG. 10B.
FIG. 11C is a view illustrating a composite waveform of FIG. 11A and FIG. 11B.
FIG. 12A is a plan view showing a state, in which the first detecting body is further rotated 90° from the state shown in FIG. 10A.
FIG. 12B is a plan view showing a state, in which the first detecting body is further rotated 90° from the state shown in FIG. 10B.
FIG. 13A is a view illustrating a waveform output from the light receiving device in the state shown in FIG. 12A.
FIG. 13B is a view illustrating a waveform output from the light receiving device in the state shown in FIG. 12B.
FIG. 13C is a view illustrating a composite waveform of FIG. 13A and FIG. 13B.
FIG. 14 is an exploded, perspective view showing a conventional, rotational angle detector.