Integrated Bezel Lens Flashlight Beam Shaping
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Solution Overview
Problem
Conventional flashlight lenses struggle to combine maximum intensity for a spot beam with substantial uniformity for a wide beam, and existing integrated lens and bezel systems are limited in their ability to adjust the light source position for varying beam shapes.
Innovation Solution
An integrated bezel and lens system that allows for adjustable positioning of the light source relative to the lens, using a one-piece design with a central focusing element, annular ring, and adjustable mechanisms such as threaded or slidable couplings, enabling the transition between narrow and wide beam configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional lenses use a central convex lens surface combined with additional convex surfaces for focusing, then light focusing capability is improved, but the capacity to combine maximum intensity for spot beam with substantial uniformity for wide beam is limited
Solution Approach 1:
The lens is divided into multiple distinct optical zones: a central focusing zone with a specific curvature radius for spot beam generation, and one or more annular zones with different curvature radii for wide beam generation. Each zone independently shapes light from the source to produce different beam characteristics, allowing the lens to provide both maximum spot intensity and uniform wide beam distribution simultaneously.
2Manufacturing precision
If lenses are provided with additional convex surfaces for proper focusing of light, then light focusing is improved, but device complexity increases
Solution Approach 1:
Different regions of the lens surface are assigned different optical properties: the central zone has a first curvature radius optimized for focusing light into a spot beam, while annular zones have second curvature radii optimized for creating wide beam distribution. This local differentiation allows each zone to perform its specific function with high precision without requiring the entire lens surface to be complex.
3Ease of manufacture
If integrated lens and bezel systems are designed as one-piece components, then manufacturing is simplified, but adjustability of light source position is reduced
Solution Approach 1:
The system incorporates an adjustable mechanism that allows the light source to be positioned at different locations along the optical axis relative to the lens. This dynamic adjustment capability enables the user to optimize the light source position for different beam types (spot or wide) while the lens and bezel remain as an integrated one-piece component, combining manufacturing simplicity with operational flexibility.
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 effectively focuses light into either a narrow spot beam or a wide flood beam by adjusting the light source position, providing enhanced intensity and uniformity across different beam distributions.
Implementation Method 1
lens with a central focusing element, annular ring, and adjustable mechanisms such as threaded or slidable couplings, enabling the transition between narrow and wide beam configurations
Data Source
AI summary
Disclosed in various embodiments are integrated lens and bezel systems for a flashlight or other lighting unit. Various embodiments include a housing, including a bezel portion and a body portion, a lens, wherein the lens and the bezel together comprise a single, continuous component, and a light source disposed within the housing, wherein the light source is configured to interact with the lens to provide a light beam. Some embodiments provide a mechanism for adjusting the relative positions of the light source and lens, for example to allow for focusing of the light beam. In some embodiments, the lens is continuous with just the bezel portion, whereas in other embodiments, the lens, bezel, and all or part of the body portion are formed as a single, unitary component, for instance by injection-molding or co-molding.