Spotlight With Movable Auxiliary Reflector For Beam Angle Control
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Solution Overview
Problem
Conventional spotlights for film, studio, stage, event, and theatre environments typically require separate devices for wide-angle and narrow-angle lighting, leading to inefficiencies and increased temperature due to the use of annular stops that scatter direct light, reducing effectiveness.
Innovation Solution
A spotlight design that incorporates a movable auxiliary reflector and reconfigurable output optical unit, allowing the same device to function as both a wide-angle and narrow-angle spotlight by adjusting the auxiliary reflector's position and reconfiguring the output optical unit, eliminating the need for multiple spotlights and reducing light scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a spotlight uses annular stops to control beam angle, then the beam direction can be controlled, but light scattering increases and effectiveness decreases
Solution Approach 1:
The patent removes the annular stops from the optical path entirely. Instead of using stops to control the beam, the invention uses a movable auxiliary reflector that redirects light around the light source, eliminating the need for light-blocking stops and thereby reducing light scattering and energy loss.
Solution Approach 2:
The auxiliary reflector acts as an intermediary element between the light source and the output. It mediates the light path by reflecting and redirecting light around the light source, enabling beam control without the need for light-blocking annular stops.
2Adaptability or versatility
If separate spotlights are used for wide-angle and narrow-angle lighting, then each function is optimized, but device complexity and cost increase
Solution Approach 1:
The patent creates a universal spotlight that can perform both wide-angle and narrow-angle lighting functions using a single device. The movable auxiliary reflector can be positioned in different locations to change the beam angle, allowing one spotlight to replace multiple specialized spotlights.
Solution Approach 2:
The auxiliary reflector is designed to be movable rather than fixed, allowing it to be repositioned to change the beam characteristics. This dynamic element enables the single spotlight to adapt between wide-angle and narrow-angle modes, providing versatility without requiring multiple fixed-function devices.
3Measurement precision
If annular stops are used to create narrow beams, then beam focus is improved, but temperature increases due to light scattering
Solution Approach 1:
The patent extracts the annular stops from the system and replaces them with a reflector-based solution. This eliminates the source of light scattering and heat generation associated with stops, while still achieving narrow beam focus through the auxiliary reflector's positioning.
Solution Approach 2:
Instead of blocking light with stops (which generates heat), the invention uses the auxiliary reflector to redirect light constructively around the light source. This converts the potential harm of light obstruction into a beneficial reflective path that achieves focus without the harmful heat generation.
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
Enables seamless switching between wide-angle and narrow-angle beam emissions without altering the spotlight's internal structure, improving efficiency and reducing temperature issues by minimizing light scattering, thus enhancing performance and versatility.
Implementation Method 1
an auxiliary reflector (16), the auxiliary reflector being disposed movably, such that it can be positioned at least at a first position between the main reflector (14) and the light source (12) or at a second position between the light source (12) and the output optical unit (15)
Data Source
AI summary
Spotlight (1) for illuminating a film, studio, stage, event and/or theatre environment, comprising: a light space (11) having an optical axis (17) which defines a light output direction; a light source (12) which is disposed in the light space (11); a housing (13) which delimits the light space (11) and extends in the light output direction; a main reflector (14) which delimits the light space, extends transversely with respect to the light output direction and, relative to the light output direction, is disposed upstream of the light source (12); an output optical unit (15) which is disposed at a light exit side of the light space (11) and, relative to the light output direction, is disposed downstream of the light source (12) and outputs the light of the spotlight (1); an auxiliary reflector (16), wherein the auxiliary reflector (16) is disposed movably, such that it can be positioned at least at a first position between the main reflector (14) and the light source (12) or at a second position between the light source (12) and the output optical unit (15).