Cross-Line Laser Optical Path Layout to Eliminate Multiple Projection Points
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cross line lasers suffer from accuracy issues due to non-perpendicular incidence of light on the wedge-shaped mirror, leading to multiple projection points instead of the intended 'two-point-and-one-line' pattern, affecting operator distinguishability and operability.
Innovation Solution
An optical path structure comprising a laser emitter, an aspherical mirror, planar beamsplitters, a wedge-shaped mirror with specifically angled surfaces, and a cylindrical mirror, which focuses and directs laser light to avoid interference and ensure a 'two-point-and-one-line' projection by using an aspherical mirror to focus light, planar beamsplitters to split and refract light, and a wedge-shaped mirror to deflect light rays, and a cylindrical mirror to scatter them into a uniform line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the wedge-shaped mirror is used with a perpendicular incident surface to the light ray, then the optical path structure is simple, but the light ray cannot be guaranteed to be incident perpendicularly, resulting in deviation and multiple projection points
Solution Approach 1:
The patent applies asymmetry by designing the wedge-shaped mirror with a specific non-perpendicular incident surface angle (α) relative to the optical axis. This asymmetric configuration ensures that the light ray from the laser emitter always strikes the incident surface at the correct angle, eliminating the deviation problem that occurs with perpendicular mirrors. The asymmetric design guarantees consistent light reflection geometry, producing a single accurate projection point rather than multiple scattered points.
2Ease of operation
If the incident surface of the wedge-shaped mirror is perpendicular to the light ray, then the structure is straightforward, but multiple projection points are formed affecting operator distinguishability
Solution Approach 1:
The asymmetric incident surface angle (α) of the wedge-shaped mirror ensures that light rays are reflected at consistent, predictable angles, producing a single clear projection point. This eliminates the multiple projection points that occur with perpendicular mirrors, thereby improving operator distinguishability and ease of operation.
Solution Approach 2:
The patent changes the geometric parameter of the wedge-shaped mirror by setting the incident surface angle (α) to a specific non-perpendicular value. This parameter change transforms the optical behavior from producing multiple scattered projection points to producing a single accurate projection point, directly improving both manufacturing precision and operator distinguishability.
3Device complexity
If the light ray deviates after reflection from the wedge-shaped mirror, then the optical path is simpler, but the projected laser light line accuracy is affected
Solution Approach 1:
The asymmetric incident surface angle (α) of the wedge-shaped mirror ensures that light rays are reflected at consistent, predictable angles, producing a single clear projection point. This eliminates the multiple projection points that occur with perpendicular mirrors, thereby improving operator distinguishability and ease of operation.
Solution Approach 2:
The patent changes the geometric parameter of the wedge-shaped mirror by setting the incident surface angle (α) to a specific non-perpendicular value. This parameter change transforms the optical behavior from producing multiple scattered projection points to producing a single accurate projection point, directly improving both manufacturing precision and operator distinguishability.
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 ensures a precise 'two-point-and-one-line' projection pattern on the work surface, eliminating multiple points and improving the accuracy and operability of the cross line laser.
Implementation Method 1
an aspherical mirror provided at a light outlet of the laser emitter and employed for focusing laser light emitted by the laser emitter and emitting parallel first light ray
Implementation Method 2
when the first light ray passes through the first beamsplitter and the second beamsplitter, the laser light at the two sides of the first light ray is divided into a first reflected light ray, a first refracted light ray, a second reflected light ray, and a second refracted light ray
Implementation Method 3
when the first light ray passes through the first beamsplitter and the second beamsplitter, the laser light at the two sides of the first light ray is divided into a first reflected light ray, a first refracted light ray, a second reflected light ray, and a second refracted light ray
Implementation Method 4
the wedge-shaped mirror is employed for emitting a second light ray after deflecting the first light ray by an angle γ, and a third refracted light ray and a fourth refracted light ray parallel to the second light ray after deflecting the first refracted light ray and the second refracted light ray by an identical angle γ
Implementation Method 5
a cylindrical mirror for scattering the second light ray, the third refracted light ray and the fourth refracted light ray into a laser-light marking line to be projected on a work surface
Data Source
AI summary
A optical path structure and a cross line laser comprising the same are provided. The optical path structure comprises a laser emitter (1) for emitting laser light, and the following devices arranged sequentially along the direction of the optical path of the laser light: an aspherical mirror (2), a first beamsplitter (31) and a second beamsplitter (32), a wedge-shaped mirror (4), and a cylindrical mirror (5). The advantages of the present invention are that: 1) the angle of the incident surface (41) of the wedge-shaped mirror (4) is reasonably set such that the light ray reflected by the incident surface (41) of the wedge-shaped mirror (4) cannot emit onto the beamsplitters (31, 32), or even if it emits onto the beamsplitters (31, 32), there is no interference with the reflected light rays (61, 63) by the beamsplitters (31, 32), avoiding the multiple-point phenomenon; 2) the structure of the wedge-shaped mirror (4) is reasonably set such that the breakpoints in the projected laser light line are eliminated.