Textured Framing Blades for Theatrical Lighting Contrast
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Solution Overview
Problem
Multiparameter theatrical lighting fixtures face challenges in maintaining high contrast ratios due to residual infrared energy causing framing blades to warp and excessive reflection from mill finish surfaces, leading to reduced contrast and mechanical malfunctions.
Innovation Solution
The use of framing blades with textured or embossed surfaces and dry film coatings like molybdenum or graphite to scatter light rays, reducing reflection and oxidation, and altering the surface topology to distribute reflected energy, ensuring high contrast and mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If framing blades are exposed to high density light energy, then the light output is improved, but the blades warp due to residual infrared energy
Solution Approach 1:
The patent applies parameter changes by modifying the surface properties of the framing blades through texturing and embossing. These surface modifications alter the optical parameters to scatter infrared radiation, thereby reducing thermal absorption and preventing blade warping while maintaining high light output performance.
Solution Approach 2:
The patent employs composite material structures by combining different surface treatments (texturing and embossing) on the framing blades. This composite approach creates a multi-functional surface that both scatters infrared energy and maintains the mechanical integrity and optical performance of the blades.
2Ease of manufacture
If mill finish surfaces are used on framing blades, then the manufacturing is simple, but excessive light reflection occurs reducing contrast ratio
Solution Approach 1:
The patent applies local quality by implementing specific surface treatments (texturing and embossing) only on the portions of the framing blades that face the light source and require light scattering. This localized approach maintains simplicity in manufacturing while achieving the desired light distribution to improve contrast ratio.
Solution Approach 2:
The patent utilizes curvature principles through embossed surfaces on the framing blades. These curved or textured surfaces scatter incident light rays in multiple directions, reducing specular reflections and improving the contrast ratio while remaining manufacturable.
3Illumination intensity
If framing blades are positioned close to the light source, then the framing effect is improved, but mechanical malfunctions occur due to thermal effects
Solution Approach 1:
The patent converts the harmful thermal effects into a beneficial outcome by using the infrared energy to enhance the scattering effect of the textured and embossed surfaces. This increased scattering further reduces thermal absorption and prevents mechanical malfunctions, allowing the blades to be positioned closer to the light source.
Solution Approach 2:
The patent changes the thermal parameters of the framing blades through surface texturing and embossing, which modifies the heat absorption and distribution characteristics. This allows the blades to withstand higher temperatures closer to the light source without suffering mechanical degradation.
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
This solution effectively maintains high contrast ratios and prevents mechanical failures by scattering light rays and reducing oxidation, meeting the stringent requirements of the theatrical industry.
Implementation Method 1
The use of framing blades with textured or embossed surfaces and dry film coatings like molybdenum or graphite to scatter light rays, reducing reflection and oxidation
Implementation Method 2
The use of framing blades with textured or embossed surfaces and dry film coatings like molybdenum or graphite to scatter light rays, reducing reflection and oxidation
Data Source
AI summary
A plurality of framing blades; and a multiparameter theater light including a light source; and an optical component. Each of the plurality of framing blades configured to be placed in a path of the light source so that at least one surface of each of the plurality of framing blades reflects light rays from the light source. At least one surface of each of the plurality of framing blades may include a plurality of peaks and a plurality of troughs, alternating between a peak and a trough, and the distance between adjacent peaks varies; and wherein light rays incident on the at least one surface with the same angle of incidence with respect to a straight line defining a length of each of the plurality of framing blades, have a different angle of reflection with respect to the straight line, depending on where the light rays are incident on.