Narrow Laser Optical Module With Integrated Glass for Low Light Loss
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Solution Overview
Problem
Conventional laser optical modules are bulky, require complex assembly, and suffer from significant light loss due to multiple material layers, making them unsuitable for thin and light mobile devices.
Innovation Solution
A laser optical module design featuring a narrowed shape tube with an integrated optical glass and L-shaped accepting surface, eliminating the need for a separate packaging cover and protective glass, and optimizing the optical focal length for reduced volume and light loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional TO-CAN structure with packaging cover and protective glass is used, then the laser diode is protected from dust and environmental factors, but the module volume becomes large and assembly becomes complex
Solution Approach 1:
The patent merges the protective cover and protective glass into a single integrated protective window structure. The protective window directly covers the light outlet without requiring separate packaging cover and glass layers, reducing the overall module volume while maintaining protection functionality
Solution Approach 2:
The patent extracts and eliminates unnecessary intermediate structures from the conventional TO-CAN design. By removing the separate packaging cover and protective glass assembly, the design achieves a more compact form factor while the protective window provides the necessary environmental protection
2Reliability
If protective glass is pushed upward and bonded from the packaging cover, then the light outlet is sealed, but the manufacturing process becomes inconvenient and time-consuming
Solution Approach 1:
The protective window is pre-positioned and fixed on the base at the light outlet location before the laser diode is mounted. This preliminary positioning eliminates the need for subsequent complex bonding operations to seal the light outlet, simplifying the manufacturing process while ensuring proper sealing
3Adaptability or versatility
If a shell with optical lens is installed on the periphery of the base, then the required optical function is achieved, but the work distance requirement increases process accuracy demands and assembly costs
Solution Approach 1:
The protective window serves multiple functions: it protects the light outlet from environmental factors and simultaneously functions as the optical element (collimating lens). This integration eliminates the need for a separate shell with optical lens installed on the periphery, reducing assembly complexity and work distance precision requirements
4Use of energy by moving object
If the laser beam passes through protective glass and then to the optical lens, then the light is transmitted, but light loss occurs due to passing through two layers of materials
Solution Approach 1:
The protective window combines the protective function and optical function into a single component. The laser beam passes through only this one integrated element rather than through separate protective glass and optical lens layers, reducing the number of material interfaces and minimizing light loss while maintaining full protection and optical functionality
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
The new design enables a smaller, easier-to-assemble module with reduced light loss, suitable for thin and light electronic devices, while minimizing material and assembly costs.
Implementation Method 1
an optical glass inserted from above the through opening and fixed on the accepting surface for making the installation of the optical glass not cause the narrow shape tube to interfere with the base and the laser beam emitted by the laser diode
Implementation Method 2
the height of the narrow shape tube is set based on the optical characteristics of the optical glass and the focal length required by the narrow type laser optical module
Data Source
AI summary
A narrow type and low light loss laser optical module comprising: a base, which having a laser diode and a photodiode chip; wherein: a narrow shape tube, the diameter of the bottom of the narrowed shape tube is smaller than the base, and is covering the outer periphery of the fixed base, the top of the narrowed shape tube is provided with a through opening without a cover; an optical glass inserted from above the through opening and fixed on the accepting surface, so as to form a narrow type laser optical module; and the height of the narrow shape tube is set based on the optical characteristics of the optical glass and the focal length required by the narrow type laser optical module.