Laser Collimating Module Primary Optics Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional laser adjusting assemblies require a large volume due to numerous components and are unable to narrow the light emitting angle of the laser beam effectively, as they rely on a secondary optics design with focusing lenses.
Innovation Solution
A laser collimating module with a primary optics design that includes a heat dissipating base, a laser diode chip, a cap with a placing space, and a cylindrical lens, where the laser diode chip emits an elliptical beam to the cylindrical lens, which narrows the light emitting angle and collimates the beam without a focusing lens, reducing the component count and module volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a secondary optics design with focusing lens is used, then the laser beam can be collimated, but the light emitting angle becomes greater than 120 degrees and the module volume becomes huge
Solution Approach 1:
The patent removes the focusing lens from the optical system, transitioning from a secondary optics design to a primary optics design. The cylindrical lens directly receives the laser beam from the laser diode chip without intermediate focusing, thereby eliminating the need for large component distances and reducing module volume while achieving effective beam narrowing with a light emitting angle less than 120 degrees
Solution Approach 2:
Instead of using a focusing lens first and then a cylindrical lens (conventional sequence), the patent inverts the approach by having the cylindrical lens directly process the laser beam from the source. This inversion of the optical path sequence enables primary optics design that achieves collimation without the volume penalty of secondary optics
2Reliability
If a secondary optics design with focusing lens is used, then the laser beam can be collimated, but the number of components increases
Solution Approach 1:
The patent extracts and removes the focusing lens from the component list, reducing the total number of components. The cylindrical lens alone performs both the collimation and beam narrowing functions that previously required multiple components, simplifying the overall device structure
Solution Approach 2:
The cylindrical lens is designed to perform multiple functions simultaneously: it collimates the laser beam, narrows the beam width, and controls the light emitting angle. This multi-functionality eliminates the need for separate focusing lens and cylindrical lens components, reducing device complexity
3Reliability
If a secondary optics design with focusing lens is used, then the laser beam can be collimated, but the light emitting angle cannot be narrowed effectively
Solution Approach 1:
The patent inverts the conventional optical sequence by removing the focusing lens and having the cylindrical lens directly receive the laser beam. This inversion enables effective control of the light emitting angle, achieving a narrowed angle less than 120 degrees while maintaining proper collimation, whereas the conventional secondary optics design produces an angle greater than 120 degrees
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 solution results in a miniature volume laser collimating module that effectively narrows the laser beam, achieving a linear beam with a reduced width and height, addressing the issues of large volume and limited beam narrowing in conventional designs.
Implementation Method 1
the laser beam passing through the cylindrical lens, the light emitting angle being narrowed and the laser beam being collimated
Data Source
AI summary
A laser collimating module includes a heat dissipating base having a fixing element on a top thereof and a plurality of pins at a bottom thereof, a laser diode chip disposed on the fixing element, a cap covering on the heat dissipating base with a placing space therein and an opening on a top thereof, and a cylindrical lens disposed in the placing space. The opening of the cap is connecting to the placing space and aligning with the laser diode chip correspondingly. The cylindrical lens has a first surface facing toward the laser diode chip with a first minimized distance arranged therebetween and a second surface facing toward the opening with a second minimized distance arranged therebetween. The laser diode chip is stimulated and emits an elliptical laser beam, and a light emitting angle is formed. As the elliptical laser beam passes through the cylindrical lens, the light emitting angle is narrowed and the laser beam is collimated to be a linear beam.