Tritium Lamp with Phosphor Coating for Brightness
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Solution Overview
Problem
Existing self-luminous bodies, such as tritium gas light sources, are not conspicuous in bright light conditions and take time to be perceived in low light or dark environments, and alternative solutions like light guides and phosphorescent materials have drawbacks in brightness and durability.
Innovation Solution
A self-sufficient, permanently luminous body is created by arranging a layer of afterglow pigments between the tritium gas light source glass capsule and a transparent viewing surface, which absorbs daylight and reflects it, providing initial brightness and gradually releasing stored energy as the eye adjusts to darkness, ensuring consistent visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a tritium gas light source (GTLS) is used as a self-luminous body, then the body glows permanently for decades, but it is not conspicuous in bright light and takes time to be perceived in low light or dark conditions
Solution Approach 1:
The patent combines a GTLS (providing permanent low-level glow) with phosphorescent pigments (providing high initial brightness) into a single integrated luminous body. The phosphorescent material is applied as a coating on the GTLS surface, creating a composite structure where both light sources work together to resolve the contradiction between duration and intensity.
Solution Approach 2:
The luminous body uses a composite structure combining radioactive tritium gas within a glass capsule and phosphorescent pigments on its surface. This composite material approach allows the system to exhibit both long-term persistence (from GTLS) and high initial brightness (from phosphorescence), resolving the contradiction between duration and conspicuity.
2Illumination intensity
If light guides are used to collect and release ambient light, then the light shines brightly at a specific area, but a large area must be exposed to light and it does not glow in the dark
Solution Approach 1:
The phosphorescent pigments absorb and store light energy during the day and automatically release it at night without requiring external control or additional exposure area. This self-service mechanism eliminates the need for large light-gathering areas while providing both daytime brightness and nighttime glow.
3Duration of action of stationary object
If phosphorescent colors are used for afterglow, then they provide long and strong luminescence, but they are difficult to apply and must be well protected from environmental influences
Solution Approach 1:
The GTLS glass capsule serves multiple functions: it contains the radioactive tritium gas source, provides a substrate for phosphorescent coating, and acts as a protective barrier against environmental influences. This multi-functionality simplifies manufacturing by eliminating the need for separate protective structures.
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 luminous body is clearly visible in bright light, twilight, and darkness, allowing for easy installation and cost-effective mass production, maintaining consistent luminosity without the need for adjustments, and is suitable for various applications including emergency situations.
Implementation Method 1
These are closed glass capsules, which are coated inside with a phosphor and filled with the slightly radioactive tritium gas. Phosphors are colloquially referred to as substances that can be excited to glow by irradiation. This effect is called fluorescence
Implementation Method 2
a layer which is mixed with afterglow pigments is arranged at least in the region between the GTLS glass capsule and the viewing surface... the pigments absorb the daylight and reflect it strongly. In the gradual transition from daylight to twilight, the illuminant can still be seen very well because the pigments have stored energy, which they slowly release in the form of light
Implementation Method 3
filled with the slightly radioactive tritium gas... Thanks to the long half-life of the tritium gas, such radio-luminescent capsules glow for decades
Data Source
Figure 1~3
Figure 4~6
AI summary
The invention relates to an autonomous, permanently illuminating object (1) for identifying important points in bright conditions, poor lighting conditions, and in darkness, for installation in instruments or for attachment to items that must be found quickly in emergency situations. Said lamp (1) comprises a gaseous tritium light source (GTLS) (2) configured as a glass capsule, which is fixed in a sheath (3) having a transparent viewing area (4). According to the invention, a layer (6), which is provided with photoluminescent pigments (5), is arranged at least in the region between the GTLS glass capsule (2) and the viewing area (4).