Laser Light Source Module With Wedge Beam Overlap for Compact Red Output
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Solution Overview
Problem
The development of a laser light source module for projectors is hindered by the complexity and increased production cost associated with enhancing red laser output power, due to the lower power of red lasers compared to other wavelengths.
Innovation Solution
A laser light source module is designed with a multiple resonant cavity red semiconductor laser chip, a wedge structure, a plano-convex lens, and an optical fiber. The wedge structure refracts the first and second light beams from the laser chip to overlap them, forming a single light beam that reduces the light receiving area and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the number of red light source is increased for enhancing red laser output power, then the red laser output power is improved, but the optical design becomes complicated and the light receiving area becomes larger
Solution Approach 1:
The patent divides a single red laser source into multiple resonant cavities (first, second, and third resonant cavities) within one laser chip. Each cavity emits light beams that are then combined through optical elements (wedge structure and plano-convex lens) to achieve high output power without increasing the number of separate laser sources or expanding the light receiving area.
2Power
If the number of red light source is increased for enhancing red laser output power, then the red laser output power is improved, but the light receiving area becomes larger
Solution Approach 1:
The patent combines multiple light beams from different resonant cavities (first light beam from first resonant cavity, second light beam from second resonant cavity, and fourth light beam from third resonant cavity) into a single integrated beam path using wedge structures and plano-convex lenses. This merging allows high output power to be achieved while maintaining a compact light receiving area.
3Power
If multiple resonant cavities are used in a single laser chip, then the output power is enhanced, but the optical path design becomes more complex
Solution Approach 1:
The patent introduces wedge structures and plano-convex lenses as intermediary optical elements between the multiple resonant cavities and the light receiving surface. These intermediaries systematically manage and combine the light beams from different cavities, simplifying the overall optical path design while achieving high output power.
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 the output power of the red laser while maintaining light receiving efficiency, allowing for a smaller light receiving area and reduced production costs, making it suitable for projection systems with small light receiving areas.
Implementation Method 1
The wedge structure is configured to refract the first light beam and the second light beam into a third light beam and make the first light beam and the second light beam overlap each other
Implementation Method 2
the plano-convex lens is configured to focus the third light beam from the wedge structure to form a fifth light beam, and the light receiving surface is configured to receive the fifth light beam
Data Source
AI summary
A laser light source module includes a laser chip, a wedge structure, a plano-convex lens, and an optical fiber. The laser chip is configured to emit a first light beam and a second light beam. The wedge structure is configured to refract the first light beam and the second light beam into a third light beam and make the first light beam and the second light beam overlap each other. The wedge structure is located between the laser chip and the plano-convex lens. The plano-convex lens is located between the wedge structure and the optical fiber.