Beam Brightness Control via Lens Position Feedback
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Solution Overview
Problem
Conventional illumination systems fail to maintain constant beam intensity as the beam diameter changes, often resulting in unwanted heat generation due to increased intensity when the beam diameter becomes smaller.
Innovation Solution
A system comprising a light source, dynamic optics, an optical position feedback encoder, and a brightness control circuit that adjusts the electrical power delivered to the light source based on the position of the lens to maintain constant intensity regardless of beam size, using a microprocessor to execute equations and process user inputs for beam size adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the beam diameter is reduced to increase intensity, then the illumination intensity increases, but unwanted heat generation occurs
Solution Approach 1:
The system employs an optical position feedback encoder that continuously monitors lens position and provides feedback signals to a controller. This feedback mechanism enables real-time adjustment of light source power based on actual beam conditions, allowing the system to maintain desired intensity while preventing excessive heat generation through dynamic compensation
Solution Approach 2:
The system dynamically changes multiple parameters including light source power, lens position, and beam diameter in a coordinated manner. By adjusting these parameters together rather than independently, the system achieves intensity control without the harmful side effect of excessive heat generation
2Length of moving object
If the beam size is adjusted without power control, then the beam diameter changes, but beam intensity becomes inconsistent
Solution Approach 1:
The optical position feedback encoder provides continuous information about lens position to the controller, which then adjusts light source power accordingly. This closed-loop feedback ensures that beam intensity remains consistent regardless of beam size adjustments
Solution Approach 2:
The system calculates and adjusts light source power in advance based on predicted lens position and desired beam characteristics. This preliminary adjustment ensures that when the beam size changes, the intensity is already optimized to remain consistent
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 ensures that the light intensity remains constant across various beam sizes, preventing unwanted heat generation and maintaining consistent illumination, as demonstrated by the adjustment of power levels in response to lens position changes.
Implementation Method 1
an optical position feedback encoder and a brightness control circuit that adjusts the electrical power delivered to the light source based on the position of the lens
Implementation Method 2
one or more optical control devices such as dynamic optics or lenses
Implementation Method 3
generating a beam of light that impinges on a target
Data Source
AI summary
A method for generating a beam of light that impinges on a target, wherein beam intensity remains substantially constant regardless of beam spot size. The method involves: providing a light source, a lens that can be moved to or between various positions, a slide having positions at which the lens may be supported, a target at which a beam is directed and a controller that communicates between an optical position feedback encoder and the light source; linking the encoder and the lens, the encoder sending a lens position signal to the controller, including an encoder translator circuit which communicates with a microprocessor that receives user inputs which characterize desired beam size at the target; generating a light source power signal to the light source so that electrical power delivered by the light source changes in response to the position of the lens.