Laser Light Source Compact Optical Path Design
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Solution Overview
Problem
Laser light sources and projection display devices are excessively large due to the lengthy optical path required for beam shaping, which restricts the compactness and size of the device.
Innovation Solution
The arrangement of convex lenses between laser devices and reflector components, along with a concave lens, reduces the optical distance by converging and shaping light beams efficiently, allowing for a more compact distribution of optical devices and a smaller device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional optical paths are used to converge and shape light beams, then effective light beam shaping is achieved, but the device size and structural length become excessively large
Solution Approach 1:
The patent introduces a reflector component that changes the light propagation path from a linear sequence to a multi-dimensional arrangement. By reflecting light at specific angles, the system achieves effective beam shaping in a compact spatial configuration, converting a one-dimensional optical path into a two-dimensional or three-dimensional path that reduces overall device length while maintaining shaping effectiveness.
Solution Approach 2:
The reflector component acts as an intermediary element between the laser devices and the concave lens. It mediates the light path by redirecting and focusing the beams, enabling the convex lenses to be positioned closer to the laser devices and allowing the concave lens to receive properly shaped beams at a reduced distance, thus shortening the overall optical path.
2Manufacturing precision
If convex lenses are positioned far from laser devices to converge light beams, then effective convergence is achieved, but the device becomes less compact
Solution Approach 1:
The patent divides the beam shaping function into separate stages: convex lenses for initial convergence and the concave lens for final shaping. By segmenting the optical path and introducing a reflector between the stages, the system achieves effective beam convergence and shaping in a compact arrangement where each component can be positioned optimally without requiring excessive space.
Solution Approach 2:
The convex lenses perform preliminary convergence of the laser beams before they reach the reflector component. This preliminary action pre-focuses the beams, allowing the subsequent reflector and concave lens to complete the shaping process with minimal additional space, thereby achieving compact device volume while maintaining convergence effectiveness.
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 results in a more compact laser light source and projection display device, addressing the issue of excessive size while maintaining effective beam shaping and light path conversion.
Implementation Method 1
Each convex lens corresponds to a group of laser devices, and is configured to converge light beams emitted by the corresponding group of laser devices
Implementation Method 2
Each reflector component corresponds to at least one convex lens and is disposed in the emergent light direction of the corresponding convex lens
Implementation Method 3
the concave lens is disposed in the emergent light direction of the at least one reflector component. The emergent light beam of the convex lens corresponding to each reflector component passes through the reflector component and then arrives at the concave lens
Data Source
AI summary
The present disclosure relates to a laser light source and a projection display device. The laser light source includes: N groups of laser devices, N convex lenses, a concave lens and at least one reflector component; each convex lens corresponds to a group of laser devices, and is configured to converge light beams emitted by the corresponding group of laser devices; each reflector component corresponds to at least one convex lens and is disposed in a emergent light direction of a corresponding convex lens, and the concave lens is disposed in a emergent light direction of the at least one reflector component; and an emergent light beam of the convex lens corresponding to each reflector component passes through the reflector component and then arrives at the concave lens.