Light Irradiation Device With Planar Secondary Reflector
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Solution Overview
Problem
Conventional light irradiation devices have low luminous efficiency due to light not effectively irradiating wire-like members, particularly because light propagating between the reflective and light-emitting portions does not utilize the wire-like member efficiently.
Innovation Solution
A light irradiation device with a first reflective portion having a concave, arcuate shape and a second reflective portion arranged between the light-emitting and reflective portions, where the second reflective portion is planar and positioned to redirect light that would otherwise be lost, improving the irradiation of the wire-like member by adjusting the angle of intersection and offsetting the center of curvature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional light irradiation device with a single reflective portion is used, then the device structure is simple, but the luminous efficiency is low because light propagating between the reflective and light-emitting portions does not irradiate the wire-like member
Solution Approach 1:
The reflective surface is segmented into two distinct portions: a first reflective portion with a concave arcuate shape and a second reflective portion with a planar surface. This segmentation allows each portion to perform different functions - the first reflective portion provides initial light reflection while the second reflective portion captures and redirects light that would otherwise be lost, thereby improving luminous efficiency without creating a complex multi-component system
Solution Approach 2:
The second reflective portion is arranged in a direction circumferential with respect to the first reflective portion, adding a dimensional aspect to light redirection. This circumferential arrangement allows the second reflective portion to intercept light propagating in directions that the first reflective portion cannot capture, effectively utilizing light paths in an additional spatial dimension to improve overall irradiation efficiency
2Loss of energy
If the second reflective portion is arranged at a specific angle to redirect light, then luminous efficiency improves, but the device requires precise angular positioning
Solution Approach 1:
The angle of intersection between the second reflective portion and the radial direction of the first reflective portion is optimized within a specific range (greater than 0° but less than 90°). This parameter optimization ensures that light reflected by the first reflective portion is effectively redirected by the second reflective portion onto the wire-like member, achieving high luminous efficiency while allowing for practical manufacturing tolerances
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 configuration significantly enhances luminous efficiency by ensuring that a greater percentage of emitted light is directed towards and effectively irradiates the wire-like member, even when the member's position shifts.
Implementation Method 1
a first reflective portion which is arranged at a concave inner surface formed so as to have a substantially arcuate shape
Implementation Method 2
a second reflective portion that is formed in planar fashion; wherein at least a portion of the second reflective portion is arranged between an end of the first reflective portion and an end of the light-emitting portion
Data Source
AI summary
A light irradiation device includes a first reflective portion that is arranged at a concave inner surface formed so as to have a substantially arcuate shape and that permits wire-like member to be inserted into an interior thereof, at least one light-emitting portion that emits light in such fashion as to be directed toward the wire-like member from a direction which is circumferential with respect to the wire-like member, and a second reflective portion that is formed in planar fashion, at least a portion of the second reflective portion is arranged between an end of the first reflective portion and an end of the light-emitting portion in a direction circumferential with respect to the first reflective portion.