Scanning Projector Beam Shaping for Laser Energy Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Scanning type projectors face challenges in achieving high intensity and high-quality image projection due to elliptical laser beam cross-sections, which result in energy loss and inefficient beam shaping, particularly when passing through optical components.
Innovation Solution
A scanning type projector configuration that includes a collimator lens, a beam contracting/shaping element to reduce the laser beam width, and a condensing lens to convert the beam into focused light, ensuring the elliptical major axis direction aligns with the beam contraction direction, thereby reducing losses and adjusting the beam diameter according to the resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the elliptical laser beam is transmitted through optical components without shaping, then the device complexity is reduced, but energy loss increases and beam quality deteriorates
Solution Approach 1:
The beam contracting/shaping element is positioned before the condensing lens to pre-shape the elliptical laser beam. This preliminary shaping action ensures optimal beam geometry enters the condensing lens, maximizing energy transmission and minimizing loss while maintaining manageable device complexity through staged optical processing
Solution Approach 2:
The optical system applies different processing to different dimensions of the elliptical beam. The beam contracting element specifically addresses the major axis dimension while the condensing lens handles focal concentration, creating locally optimized beam quality in each dimension rather than treating the beam as a uniform entity
2Productivity
If the beam diameter is increased to cover more pixels, then the productivity is improved, but the manufacturing precision of the image resolution deteriorates
Solution Approach 1:
The optical system enables dynamic control of beam diameter through the coordinated action of the beam contracting element and condensing lens. By adjusting the positioning and optical parameters of these elements, the system can dynamically optimize beam size to match different projection requirements and resolutions, achieving both coverage and precision as needed
Solution Approach 2:
The system changes the beam diameter parameter through optical manipulation. The beam contracting element modifies the beam width in one dimension, and the condensing lens adjusts the focal parameters, allowing the beam diameter to be optimized for either coverage or resolution depending on the specific projection requirements
3Manufacturing precision
If the beam diameter is decreased to match pixel resolution, then the manufacturing precision is improved, but the energy loss increases due to insufficient light intensity
Solution Approach 1:
The beam contracting element selectively reduces the beam dimension in the direction of the elliptical major axis, applying local quality optimization only where needed. This targeted approach maintains sufficient beam intensity while achieving the precise diameter required for pixel-resolution accuracy, avoiding unnecessary energy loss
Solution Approach 2:
The system changes the beam diameter parameter through controlled optical contraction. By precisely adjusting the beam contracting element and condensing lens parameters, the beam diameter is optimized to match pixel resolution while maintaining adequate light intensity, resolving the contradiction between precision and energy efficiency
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 enables reduced laser beam loss and optimal beam diameter adjustment, resulting in a high-intensity, highly efficient projection image with improved energy utilization and resolution.
Implementation Method 1
a collimator lens collimating the laser beam emitted from the light source without converting the same into focused light
Implementation Method 2
a beam contracting/shaping element that reduces a luminous beam width in a predetermined direction of the laser beam emitted from the collimator lens
Implementation Method 3
a condensing lens that converts a laser beam emitted from the beam contracting/shaping element into focused light corresponding to a projection distance
Implementation Method 4
a two-dimensional scanning unit configured to two-dimensionally scan and project a laser beam emitted from the condensing lens
Data Source
AI summary
A scanning type projector two-dimensionally projecting a laser beam and generating an image according to the present invention comprises: a light source having a light intensity corresponding to a pixel of the image and emitting a laser beam having an elliptical beam; a collimator lens collimating a laser beam emitted from the light source without converting the same into focused light; a beam contracting/shaping element that reduces a luminous beam width in a predetermined direction of the laser beam emitted from the collimator lens; a condensing lens that converts a laser beam emitted from the beam contracting/shaping element into focused light corresponding to a projection distance; and a two-dimensional scanning unit configured to two-dimensionally scan and project a laser beam emitted from the condensing lens.