Optical encoder unit and optical encoder
An encoder and optical technology, applied in the field of optical encoders, to reduce the influence of changes in the detected light quantity and relax the requirements
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Embodiment approach 1
[0087] figure 1 It is a block diagram of the optical encoder unit which concerns on Embodiment 1. FIG. figure 2 This is an external perspective view of the optical encoder unit according to the first embodiment. figure 1 Yes figure 2 Schematic diagram of the cross section. image 3 It is an explanatory diagram explaining an example of the arrangement of the optical encoder and the optical sensor unit. Figure 4 It is a block diagram of the optical encoder according to the first embodiment. Figure 5 It is an explanatory diagram showing an example of the pattern of the optical encoder according to the first embodiment. The optical encoder unit 31 includes a rotor 10 having a shaft 12 coupled to a rotating machine such as a motor, a stator 20, and an optical sensor unit 35 capable of reading a signal pattern.
[0088] like figure 1 As shown, the rotor 10 has a Figure 5 The optical code wheel 11 is shown as a disc-shaped or polygon-shaped component. The optical dial 11...
Embodiment approach 2
[0133] Figure 22 It is a block diagram of the optical encoder unit which concerns on Embodiment 2. FIG. Figure 23It is an explanatory diagram explaining an example of the arrangement of the optical encoder and the optical sensor unit according to the second embodiment. In addition, the same code|symbol is attached|subjected to the same member as mentioned above, and the overlapping description is abbreviate|omitted. In the optical encoder unit 31, the light source light 71 of the light source 41 is reflected by the optical encoder 11, and the reflected reflected light is used as the incident light 72. It is detected by the optical sensor unit 35A of the part PD2 and the fourth light receiving part PD4. The distance D between the emission surface of the light source 41 and the arrangement center S0 (optical sensor unit 35 ) is half of that in the first embodiment due to specular reflection. In addition, if Figure 22 As shown, the optical encoder unit 31 according to Embo...
Embodiment approach 3
[0135] Figure 24 It is a block diagram of the optical encoder unit which concerns on Embodiment 3. FIG. In addition, the same code|symbol is attached|subjected to the same member as mentioned above, and the overlapping description is abbreviate|omitted. The optical encoder unit 31 according to the third embodiment has the same arrangement of the transmissive optical encoder and the optical sensor as the first embodiment, but is different from the first embodiment in that the substrate 23 is a flexible substrate 23FP. The preamplifier AMP is the optical sensor unit 35A directly stacked on the amplifier of the package. Since the preamplifier AMP is built in the casing 21, the durability can be improved. In the preamplifier AMP, a light receiving element and an amplifier circuit may be mounted on a bare chip. In addition, the preamplifier AMP may be formed integrally with the light receiving element and the amplifier circuit in the semiconductor process.
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