Non-coaxial Projection Light Source System Using Dichroic Prism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional projection light source systems are complex, large, and costly due to the need for components like dichroic mirrors to separate excitation and fluorescent light paths.
Innovation Solution
A non-coaxial projection light source system that uses a converging shaping lens group to separate the light paths of excitation and fluorescent light, eliminating the need for dichroic mirrors and reducing system components, volume, and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a dichroic mirror is used to separate light paths of excitation and fluorescent light, then light path separation is achieved, but system complexity increases and manufacturing cost rises
Solution Approach 1:
The patent extracts and removes the dichroic mirror from the optical system, replacing it with a dichroic prism that integrates the light separation function directly into the beam path. This eliminates the need for separate mirror components while maintaining effective separation of excitation and fluorescent light paths.
Solution Approach 2:
The patent merges the light separation function with the beam delivery system by using a dichroic prism that combines multiple optical functions (reflection, transmission, and beam direction) into a single integrated component, thereby reducing system complexity while maintaining separation effectiveness.
2Volume of stationary object
If multiple components are used to separate light paths, then light separation is effective, but system volume increases
Solution Approach 1:
The patent combines multiple light separation functions into a single dichroic prism component, which integrates reflection and transmission surfaces in one element. This consolidation maintains effective light path separation while significantly reducing the overall system volume compared to using multiple separate mirrors and optical elements.
Solution Approach 2:
The patent transitions from a planar mirror-based separation system to a three-dimensional prism structure that utilizes spatial dimensionality to achieve light separation. The dichroic prism employs angled surfaces and internal reflections to separate light paths in multiple dimensions, maintaining separation effectiveness while compacting the system volume.
3Ease of manufacture
If conventional light path separation components are used, then light separation is achieved, but manufacturing cost increases
Solution Approach 1:
The patent integrates light separation functionality into a single dichroic prism component rather than requiring multiple separate optical elements. This consolidation reduces the number of manufacturing steps, alignment procedures, and assembly operations, thereby lowering manufacturing costs while maintaining reliable light path separation through the integrated prism design.
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 system is simpler, more compact, and cost-effective, with reduced light loss and improved output brightness, while maintaining effective separation of light paths.
Implementation Method 1
excitation light emitted by the light source is emitted to the converging shaping lens group in an optical axis direction inclined to the converging shaping lens group and then is emitted to the fluorescent wheel. Radiating fluorescent light generated by excitation on the fluorescent wheel
Implementation Method 2
Excitation light emitted by the light source is emitted to the converging shaping lens group in an optical axis direction inclined to the converging shaping lens group and then is emitted to the fluorescent wheel. Radiating fluorescent light generated by excitation on the fluorescent wheel is emitted to the converging shaping lens group and then is converged to a light path direction different from the excitation light
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Disclosed is a non-coaxial projection light source system including a light source, a fluorescent wheel, and a converging shaping lens group located between the light source and the fluorescent wheel. Excitation light emitted by the light source is emitted to the converging shaping lens group in an optical axis direction inclined to the converging shaping lens group and then is emitted to the fluorescent wheel. Radiating fluorescent light generated by excitation on the fluorescent wheel is emitted to the converging shaping lens group and then is converged to a light path direction different from the excitation light to be output. The non-coaxial projection light source system is simple and compact in structure, a dichroic mirror for splitting light is omitted, system components are effectively reduced, system cost is reduced, system occupied volume is reduced, the system structure is more compact, loss in a light conveying process is reduced, and light source output brightness is improved.