Optical Encoder Covering Lustrous Connecting Portion
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Solution Overview
Problem
Existing optical encoders face challenges in maintaining detection accuracy due to light reflection and scattering from connecting portions, which can lead to noise in the light-receiving arrays, especially in reflective encoder configurations.
Innovation Solution
The encoder design incorporates a lustrous connecting portion between substrates with a covering material that absorbs light, exposing the point light source and light-receiving elements while suppressing reflection and scattering from the connecting area, thereby reducing noise and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lustrous connecting portion is used to electrically connect substrates, then electrical connectivity is achieved, but light reflection and scattering occur causing noise in detection
Solution Approach 1:
A covering material is introduced as an intermediary substance between the lustrous connecting portion and the optical path. This covering material has light-absorbing properties that prevent light reflection and scattering from the connecting portion, thereby eliminating noise while preserving the electrical connectivity function of the lustrous connecting portion.
2Measurement precision
If the connecting portion is covered to suppress light reflection, then detection accuracy improves, but the connecting portion becomes exposed to external factors like dust and moisture
Solution Approach 1:
The covering material serves as a protective intermediary layer that simultaneously achieves two functions: it absorbs light to prevent reflection noise, and it forms a barrier that protects the lustrous connecting portion from external harmful factors such as dust and moisture, thereby improving both detection accuracy and component reliability.
3Reliability
If flux residue is present on the connecting portion, then electrical connection is established, but reflectivity is affected causing detection errors
Solution Approach 1:
The covering material acts as an intermediary layer that obscures the flux residue on the lustrous connecting portion from the optical path. By covering the area where flux residue exists, the material prevents the residue from affecting light reflection and scattering, thereby eliminating detection errors while leaving the electrical connection function intact.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the detection accuracy of the encoder by minimizing light-related noise and protecting the components from external factors like dust and moisture, while also preventing flux residue issues that can affect reflectivity.
Implementation Method 1
a covering material configured to cover the connecting portion in the manner that the point light source and the light-receiving element are exposed
Implementation Method 2
a first substrate comprising a point light source that emits light onto reflective slits formed on a disc
Implementation Method 3
light emitted from the point light source and reflected by the reflective slits
Data Source
AI summary
An encoder includes a first substrate including a point light source that emits light onto reflective slits formed on a disc and a light-receiving element that receives light emitted from the point light source and reflected by the reflective slits, a second substrate onto which the first substrate is mounted, a lustrous connecting portion configured to electrically connect the first substrate and the second substrate, and a covering material configured to cover the connecting portion in the manner that the point light source and the light-receiving element are exposed.