Lens System with Selective Anti-Reflective Coatings for Visible Reflections
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Solution Overview
Problem
Camera objectives face a challenge in achieving high transmission while allowing visible reflections in the imaged representation, which conflicts with the goal of minimizing light reflections to maintain high light intensity.
Innovation Solution
A lens system with a combination of optical lenses, where at least three lens faces are coated with a first anti-reflective coating that has higher reflectivity in specific regions of the visible spectrum, enabling multiple reflections to be visible and enhancing their intensity, while maintaining high transmission by using a second anti-reflective coating on the remaining lens faces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If anti-reflective coatings are applied to lens faces to minimize light reflection, then transmission is improved and light intensity is maintained, but visible reflections necessary for conveying mood and indicating glaring light are lost
Solution Approach 1:
The patent applies different anti-reflective coating types to different lens faces based on their specific functional requirements. Some lens faces receive coatings optimized for minimal reflection to maintain transmission, while other lens faces receive coatings with higher reflectance to produce visible reflections in the imaged representation. This localized differentiation allows each lens face to contribute optimally to either transmission or reflection visibility depending on its position and function in the optical path.
2Object-generated harmful factors
If multiple lens faces are coated with high reflectance coating to enable visible double reflections, then artistic effect is improved, but overall transmission and light intensity are reduced
Solution Approach 1:
The patent selectively applies high reflectance anti-reflective coatings to only those specific lens faces that contribute to creating visible double reflections in the imaged representation, rather than coating all lens faces uniformly. This localized application ensures that only the necessary reflections are enhanced while minimizing the impact on overall system transmission.
Solution Approach 2:
The patent applies anti-reflective coatings with differentiated reflectance properties to only a subset of lens faces rather than all faces. By applying the high reflectance coating partially to specific faces that create the desired double reflection effect, the patent achieves the artistic goal without excessively compromising overall transmission that would result from coating all faces.
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 approach allows for visually appealing double reflections in the imaged representation while maintaining high transmission and minimizing overall reflection, ensuring that important information is not lost, even in low-light conditions.
Implementation Method 1
At least three lens faces are provided with a first anti-reflective coating which has a larger reflectance, i.e., reflectivity, in at least one partial region of the visible spectral range than a second anti-reflective coating with which the remaining lens faces are provided
Implementation Method 2
the lenses are provided with an 'optical coating' in modern objectives, in particular with coatings that reduce reflection
Data Source
AI summary
A lens system for a camera objective has a plurality of optical lenses that are arranged one after another along an optical axis and are configured for imaging in the visually perceivable spectral range. At least a part of the optical lenses has two types of lens faces that intersect a beam path of the camera objective. At least three of said lens faces are provided with a first anti-reflective coating which has a larger reflectance in at least one partial region of the visible spectral range than a second anti-reflective coating of the remaining lens faces. In addition, a camera objective including the lens system and a method for producing a lens system are provided.