Crossed Cylindrical Concave Optical Panel for Zoom Strobe Irradiation Control
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Solution Overview
Problem
Existing zoom strobe devices face challenges in maintaining light quantity while narrowing the irradiation range without increasing device size, and they often require complex configurations and increased costs due to multiple optical panels and components.
Innovation Solution
A lighting device with a light emitting portion and an optical member featuring crossed cylindrical concave surfaces in the central region of the optical panel, allowing for efficient light distribution and control of irradiation range without significant size increase, by using a smaller reflection umbrella and optimizing Fresnel lens placement for both wide-angle and telephoto states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the distance between the light emitting portion and the optical panel is increased to narrow the irradiation range for telephoto photographing, then the irradiation range is narrowed, but the quantity of light decreases
Solution Approach 1:
The optical panel is divided into a central region and a peripheral region with different optical characteristics. The central region has a first optical system optimized for wide-angle photographing, while the peripheral region has a second optical system optimized for telephoto photographing. This allows each region to contribute to the overall light distribution, maintaining quantity of light while achieving narrow irradiation range for telephoto mode.
2Illumination intensity
If different optical systems are formed in the central and peripheral parts of the optical panel to optimize light distribution for both wide-angle and telephoto photographing, then light distribution is improved, but the device complexity increases
Solution Approach 1:
Two optical systems with different functions are merged into a single optical panel. The first optical system (central region) and second optical system (peripheral region) are integrated in one component, allowing the device to achieve optimized light distribution for both wide-angle and telephoto photographing without requiring separate optical panels or complex mechanical switching mechanisms.
3Area of moving object
If multiple optical panels are used to achieve different surface shapes for wide-angle and telephoto photographing, then the irradiation range control is improved, but the device size and cost increase
Solution Approach 1:
A single optical panel is designed to perform multiple functions by incorporating both a first optical system for wide-angle photographing and a second optical system for telephoto photographing. The optical panel serves as a universal component that adapts to different photographing modes through its dual optical systems, eliminating the need for multiple separate optical panels and reducing device size.
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 solution effectively maintains light quantity during irradiation range narrowing, reduces device size, and minimizes weight and cost by using a single optical panel with strategically placed Fresnel lenses and concave surfaces, enabling efficient light control and distribution in both wide-angle and telephoto modes.
Implementation Method 1
an optical member disposed in front of the light emitting portion. The optical member has a plurality of shapes such that two types of cylindrical concave surface having axial directions substantially perpendicular to each other are crossed each other
Implementation Method 2
optimizing Fresnel lens placement for both wide-angle and telephoto states
Data Source
AI summary
A lighting device capable of changing the light irradiation range includes a light emitting portion, and an optical member disposed in front of the light emitting portion. The optical member has a plurality of shapes such that two types of cylindrical concave surface having axial directions substantially perpendicular to each other are crossed each other. The plurality of shapes are formed in a central region of an entry surface through which light from the light emitting portion enters or a central region of an exit surface through which the light entering through the entry surface exits.