Optical Data Insertion Device Reflection Barrier
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Solution Overview
Problem
Current night vision systems using image intensifiers face limitations in low light conditions and are compromised by reflected light from thermal imaging attachments, which can be detected by others, increasing visibility and reducing effectiveness.
Innovation Solution
A reflection barrier comprising a primary band stop filter and optionally a secondary band pass filter is integrated into the optical data insertion device to block reflected light while allowing projected light to enter the capture aperture, minimizing detection by others.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a projector is used to insert additional optical data into the capture aperture, then information display capability is improved, but reflected light from the projector becomes detectable by others, worsening stealth performance
Solution Approach 1:
The capture aperture is segmented into two functional zones: a first region that blocks reflected light from the projector, and a second region (aperture/cutaway portion) that allows projected light to pass through. This spatial segmentation enables simultaneous achievement of information display and stealth by directing different light paths through different regions of the filter.
Solution Approach 2:
The primary filter exhibits different optical properties in different regions: the first region has light-blocking properties to prevent reflected light escape, while the second region maintains light-transmitting properties to allow projected light entry. This local differentiation of filter properties resolves the contradiction between information display and stealth.
2Object-generated harmful factors
If the light output from the projector is reduced to mitigate reflection detection, then stealth performance is improved, but the visibility and usefulness of the projected data deteriorates
Solution Approach 1:
By segmenting the filter into a first blocking region and a second transmitting region with aperture, the system allows full projector light output without compromising stealth. The transmitted light passes through the aperture to maintain visibility, while reflected light is blocked by the first region to prevent detection.
Solution Approach 2:
The primary filter acts as an intermediary element between the projector and the external environment. It selectively mediates light paths: allowing projected light to reach the target while blocking reflected light from returning to observers, thus maintaining both visibility and stealth at normal projector output levels.
3Measurement precision
If a conventional image intensifier is used, then resolution and natural imaging are improved, but the system cannot operate effectively in very low light conditions below 100 μlux
Solution Approach 1:
The system merges two imaging technologies: an image intensifier for visible/near-IR imaging with good resolution, and a thermal imager for far-IR imaging that operates in very low light conditions. The projector combines data from both sources, allowing the system to maintain resolution benefits of the intensifier while achieving operational reliability in conditions below 100 μlux through thermal imaging input.
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 reduces the visibility of the reflection barrier by blocking reflected light while maintaining the integrity of the projected image, enhancing the stealth and effectiveness of night vision systems in low light conditions.
Implementation Method 1
a primary filter adapted to cover the capture aperture of the optical system, the primary filter having an aperture or cutaway portion aligned with the light emitted by the projector into the capture aperture
Implementation Method 2
allows light emitted by the projector to pass into the capture aperture
Implementation Method 3
blocks reflections of projected light from leaving the optical system
Data Source
AI summary
An optical data insertion device for an optical system includes a projector operable to insert additional optical data into a capture aperture of the optical system so as to provide a combined image and a reflection barrier. The reflection barrier includes a secondary filter and a primary filter adapted to fit over the rest of the capture aperture of the optical system. The secondary filter is a band pass filter adapted to allow the transmission of a narrow pass band centerd on the peak emission wavelength of the projector. The primary filter is a narrow band stop filter that blocks the transmission of a narrow band of light corresponding to that allowed to pass by the band pass filter.