Adjustable Collimating Optical System for LED Light Source Misalignment
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Solution Overview
Problem
Light source devices using multiple LED elements face challenges in achieving high light output and uniform illuminance due to misalignment between LED elements and optical systems, leading to reduced brightness and illuminance, especially in applications like exposure apparatuses.
Innovation Solution
A light source device configuration that includes a plurality of LED elements, a first collimating optical system, and a second focusing optical system, allowing for adjustment of the relative optical positional relation between the LED elements and the optical systems to correct misalignment and enhance light collection, thereby maintaining high brightness and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a plurality of LED elements are arranged to achieve high light output, then light intensity is improved, but misalignment with the optical system causes decrease in illuminance
Solution Approach 1:
The patent makes the optical system adjustable relative to the LED elements. The optical system includes adjustment mechanisms that allow changing the relative positional relationship between the optical components and LED elements during assembly and maintenance, transforming a static fixed-position system into a dynamic adjustable one to compensate for alignment errors
Solution Approach 2:
The patent performs alignment adjustment during the assembly phase before the system is put into operation. The optical system is designed with adjustment capabilities that allow preliminary alignment correction when the LED elements are newly installed or replaced, preventing alignment issues from affecting operation
2Manufacturing precision
If the optical system is made adjustable to correct misalignment, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the optical system into multiple independent adjustment units, each corresponding to specific optical components. Rather than making the entire system adjustable, only the necessary optical components are designed with adjustment capabilities, segmenting the adjustment function to reduce overall complexity
Solution Approach 2:
The patent applies adjustment mechanisms only to specific optical components that require alignment correction, rather than making the entire optical system adjustable. This localized approach to adjustability reduces device complexity while still achieving the necessary alignment precision
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 configuration effectively suppresses the decrease in brightness and illuminance caused by misalignment, ensuring efficient light guidance and maintaining high illuminance even when misalignment occurs, while protecting the LED elements and preventing damage during adjustment.
Implementation Method 1
a first optical system that converts light emitted from each of the plurality of LED elements into collimated light
Implementation Method 2
a second optical system that focuses the collimated light emitted from the first optical system at the latter stage of the first optical system
Data Source
AI summary
A light source device includes a plurality of LED elements dispersed and arranged in a plane direction orthogonal to an optical axis, a first optical system that converts light emitted from each of the LED elements into collimated light; and a second optical system that focuses the collimated light. The first optical system includes a first collimating optical system including optical components disposed corresponding to the LED elements and a second collimating optical system including optical components disposed corresponding to the LED elements at the latter stage of the first collimating optical system. The second collimating optical system is capable of adjusting a relative optical positional relation with respect to the LED elements and the first collimating optical system when viewed in a direction of the optical axis in a state in which the LED elements and the first collimating optical system are fixed.