Optical Filter Enhances Laser Spot Visibility
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Solution Overview
Problem
Laser spots and lines generated by existing devices are difficult to visualize in bright environments, such as outdoors under sunshine, due to insufficient power and scattering issues, limiting their usability in applications like presentations, hunting, and golf training.
Innovation Solution
The use of a multi-film interference optical filter with a narrow transmittance bandwidth is introduced to enhance the visibility of laser spots and lines by reducing the background intensity while maintaining the laser's intensity, allowing the laser to be seen more clearly through eye wear or optical systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If laser pointers or laser line generators are used in bright environments (outdoor under sunshine), then the laser spot or line becomes difficult to see by the naked eye, but increasing laser power to improve visibility may cause harmful effects or energy loss
Solution Approach 1:
The patent introduces an optical filter as an intermediary device between the observer's eye and the laser spot/line. This filter selectively transmits the laser wavelength while blocking background light wavelengths, thereby enhancing laser visibility without increasing laser power or causing harmful effects
Solution Approach 2:
The patent changes the optical parameters of the observation system by introducing a wavelength-selective optical filter. This filter has specific transmittance characteristics that allow it to pass the laser wavelength while blocking other wavelengths, thereby improving laser spot visibility in bright environments without modifying the laser source itself
2Illumination intensity
If optical filters are introduced to enhance laser visibility, then background light is suppressed and laser spot becomes more visible, but the device complexity increases
Solution Approach 1:
The optical filter serves as a simple intermediary element that can be easily integrated into existing eyewear or optical systems. Rather than complicating the laser source or observation system, the filter provides a straightforward solution by selectively transmitting laser wavelengths while blocking background light
Solution Approach 2:
The patent applies local quality enhancement by introducing wavelength-selective filtering at the specific location where observation occurs (through eyewear or optical system). This localized approach enhances laser visibility only in the observer's field of view without affecting other parts of the system
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 enhances the visibility of laser spots and lines in bright environments by suppressing background light, making them more distinguishable without altering the laser's color or intensity, thus improving their usability in various outdoor applications.
Implementation Method 1
The use of a multi-film interference optical filter with a narrow transmittance bandwidth is introduced to enhance the visibility of laser spots and lines
Implementation Method 2
a multi-film interference optical filter with a narrow transmittance bandwidth is introduced to enhance the visibility of laser spots and lines by reducing the background intensity
Data Source
AI summary
An eye wear comprises an optical filter disposed in front of an eye. The optical filter has a transmittance function of wavelength comprising a transmittance peak having a peak transmittance and a transmittance bandwidth. A transmittance outside the transmittance peak is at a lower level transmittance, wherein a ratio of the lower level transmittance to the peak transmittance is less than unity. The transmittance peak is at a central wavelength of a laser that emits laser light forming one of a laser spot and a laser line. The transmittance bandwidth is larger than a bandwidth of the laser light emitted by the laser. The laser spot or the laser line formed by the laser light emitted by the laser is viewed through the eye wear.