Zoom Illuminating System with Adjustable Lens Unit
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Solution Overview
Problem
Conventional monitoring cameras with fixed illumination units suffer from low light efficiency due to mismatched illumination ranges when using zoom lenses, as they either waste light at wide angles or fail to provide sufficient illumination at telephoto positions.
Innovation Solution
A zoom illuminating system with an adjustable infrared light source and lens unit, where the distance between the light source and lenses can be varied to match the zoom lens's position, allowing for a wide or narrow beam spread depending on the photography conditions, thereby optimizing illumination efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed illumination range unit is used with a zoom lens, then the device complexity is reduced, but the light illumination efficiency deteriorates due to mismatched illumination ranges at different zoom positions
Solution Approach 1:
The illumination unit transitions from a fixed structure to a dynamic adjustable structure. The lens unit can move along the optical axis to change the illumination range, allowing the system to adapt the illumination angle to match different zoom positions (wide-angle to telephoto), thereby improving light utilization efficiency without excessive complexity
Solution Approach 2:
The system changes the illumination parameters (illumination range and angle) by adjusting the position of the lens unit relative to the light source. This parameter adjustment allows the illumination characteristics to vary dynamically with zoom position, resolving the efficiency loss while maintaining reasonable device complexity
2Loss of energy
If multiple light sources with different illumination ranges are used to cover wide photographing range, then the light illumination efficiency is improved, but the device complexity increases
Solution Approach 1:
Instead of using multiple static light sources, the invention employs a single light source with a dynamic lens unit that can adjust its position. This dynamic adjustment achieves variable illumination ranges equivalent to multiple fixed sources, improving efficiency while reducing the number of components and overall complexity
Solution Approach 2:
A single lens unit serves multiple functions by adjusting its position: it can provide wide-angle illumination for wide-angle positions and narrow-angle illumination for telephoto positions. This multi-functionality replaces the need for multiple specialized light sources, simplifying the device while maintaining efficiency
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 ensures high optical efficiency by adjusting the illumination range according to the zoom lens's position, increasing illumination uniformity and intensity, and enhancing visual range in dark environments with fewer light sources.
Implementation Method 1
The light source comprises a light emitting device emitting light in an infrared band
Implementation Method 2
a lens unit including at least one lens. A distance from the light source to the at least one lens is variable so as to adjust an illumination range of light emitted from the light source
Data Source
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AI summary
A zoom illuminating system and an imaging apparatus including the same are provided. The imaging apparatus includes: the zoom illuminating system; a zoom lens system including a plurality of lens groups and zooming an image of an object as a distance between the plurality of lens groups varies; an image pickup device changing an optical image formed by the zoom lens system to an electric signal; and a control unit controlling zooming of the zoom lens system to be interlocked with adjusting of an illumination range of the zoom illuminating system. The zoom illuminating system includes a light source and a lens unit including at least one lens, wherein a distance from the light source to the at least one lens is variable.