Cylindrical Optical Element Fast-Axis Divergence Compression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional laser diodes exhibit a larger divergence angle in the fast-axis direction, leading to poor collimation and energy loss, which limits their scanning precision and range in optical apparatuses.
Innovation Solution
A lighting module with a cylindrical optical element, where the light beam enters from an incident surface, compresses the divergence angle in the fast-axis direction, improving collimation by adjusting the diameter and interval of the cylindrical optical element to satisfy the condition 2≤D/E≤6, thereby enhancing scanning precision and range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a traditional laser diode is used, then the device structure is simple, but the fast-axis divergence angle is large resulting in poor collimation and energy loss
Solution Approach 1:
A cylindrical optical element is introduced as an intermediary component between the laser diode and the external environment. This element mediates the light propagation by compressing the fast-axis divergence angle while maintaining the slow-axis characteristics, thereby reducing beam energy loss without requiring fundamental changes to the laser diode structure itself
Solution Approach 2:
The patent applies parameter changes by precisely controlling the diameter and length of the cylindrical optical element, and adjusting its distance from the laser diode's fast-axis focal point. By optimizing these parameters, the system achieves improved collimation and reduced energy loss while keeping the overall device complexity manageable
2Measurement precision
If a traditional laser diode is used, then the device structure is simple, but the scanning precision and scanning range are insufficient
Solution Approach 1:
The cylindrical optical element serves as a mediator that transforms the inherently elliptical and divergent beam from a simple laser diode into a more collimated and controllable beam. This transformation enables higher scanning precision and extended scanning range while adding only a single optical component to the system
Solution Approach 2:
By changing the optical parameters through the cylindrical element's dimensions and positioning, the system achieves improved scanning performance. The parameter optimization allows the beam to maintain better collimation over longer distances, thereby expanding the effective scanning range and precision
3Stability of the object's composition
If the cylindrical optical element diameter and interval are adjusted to compress divergence angle, then collimation is improved, but the device structure becomes more complex
Solution Approach 1:
The patent employs parameter changes by optimizing the cylindrical optical element's diameter, length, and distance from the laser diode. These parameter adjustments achieve stable beam collimation with a compressed fast-axis divergence angle while maintaining a relatively simple single-element structure rather than complex multi-component arrangements
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 effectively compresses the fast-axis divergence angle, improving light beam collimation and increasing the scanning precision and range of optical apparatuses, while maintaining the slow-axis divergence angle, thus addressing the limitations of traditional laser diodes.
Implementation Method 1
the light beam enters the cylindrical optical element from the incident surface... the lighting module satisfies the following condition: 2≤D/E≤6; wherein D is a diameter of the cylindrical optical element and E is the interval from the lighting unit to the incident surface
Data Source
AI summary
A lighting module includes a lighting unit, a cylindrical optical element, a supporting unit, and a base. The supporting unit connects the base and a part of the supporting unit is higher than a junction of the base and the supporting unit. The lighting unit is disposed on the base and includes a lighting surface emitting a light beam. The cylindrical optical element includes an incident surface and both ends of the cylindrical optical element are respectively connected to the supporting unit making the incident surface facing the lighting surface and having an interval from the lighting unit to the incident surface, and the light beam enters the cylindrical optical element from the incident surface. The lighting module satisfies the following condition: 2≤D/E≤6; wherein D is a diameter of the cylindrical optical element and E is the interval from the lighting unit to the incident surface.