Optical Module Lens Layout for Independent Emitter-Receiver Alignment
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Solution Overview
Problem
Existing optical modules with integrated light emitting and receiving elements face challenges in independently adjusting the positions of these components, limiting performance improvement.
Innovation Solution
The optical module design includes separate casings for the light emitting and receiving elements, with lenses having specific cut shapes and orientations to allow independent positioning and alignment, ensuring optimal light path alignment and reduced size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the light emitting element and light receiving element are housed in the same housing, then the device structure is simplified, but the positions of the light emitting side and light receiving side cannot be independently adjusted
Solution Approach 1:
The patent divides the housing into a light emitting housing and a light receiving housing, allowing independent positioning and adjustment of each component while maintaining a compact integrated structure. This segmentation resolves the contradiction by enabling position adjustment without requiring complete structural complexity.
2Volume of moving object
If the light emitting element and light receiving element are positioned close together, then the module size is reduced, but the optical performance deteriorates
Solution Approach 1:
The patent employs a nested configuration where the light receiving element is positioned within the housing structure that also contains the light emitting element. This nesting allows compact arrangement while maintaining proper optical spacing and alignment, achieving both small size and good optical performance.
3Ease of manufacture
If conventional lenses are used without specific shape design, then the manufacturing is simpler, but the light path alignment and module size are suboptimal
Solution Approach 1:
The patent employs asymmetric lens designs where the lens shapes are specifically tailored to achieve optimal light path alignment between the light emitting and receiving elements. The asymmetric configuration allows precise control of light trajectories while maintaining manufacturability through standard lens fabrication processes.
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 design enhances optical performance by improving light emission and reception efficiency, reducing module size, and increasing distance measurement accuracy.
Implementation Method 1
a light emitting lens that is housed in the first casing and is disposed on an optical axis of the light emitting element
Implementation Method 2
a light emitting lens that is housed in the first casing and is disposed on an optical axis of the light emitting element
Implementation Method 3
a light receiving lens that is housed in the second casing and is disposed on an optical axis of the light receiving element
Implementation Method 4
a light receiving lens that is housed in the second casing and is disposed on an optical axis of the light receiving element
Implementation Method 5
a light receiving element that is disposed on the substrate at a predetermined interval from the light emitting element
Data Source
AI summary
Provided is an optical module including a substrate, a light emitting element on the substrate, a light receiving element on the substrate, a first casing on the substrate and surrounds a periphery of the light emitting element, and a second casing on the substrate and surrounds a periphery of the light receiving element. Furthermore, the optical module includes a light emitting lens in the first casing on an optical axis of the light emitting element and a light receiving lens in the second casing on an optical axis of the light receiving element, in which a first diameter of one lens out of the light emitting lens and the light receiving lens in a first direction toward an optical axis of the other lens with reference to an optical axis of the one lens is shorter than a second diameter of the one lens in a second direction.