Beam Splitter Plate Aberration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Low-illumination cameras suffer from chromatic aberration and off-axis aberration due to the introduction of a beam splitter structure, making it difficult to correct these aberrations and maintain image quality.
Innovation Solution
A beam splitter apparatus with a beam splitter plate and prisms that separates visible light and near-infrared light, ensuring equal path lengths for both wavelengths to minimize aberrations, using a thin transmissive plate and beam splitter film to reduce optical path lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a beam splitter structure is added to separate visible light and near-infrared light, then color image quality is improved, but chromatic aberration and off-axis aberration are introduced
Solution Approach 1:
The patent introduces a beam splitter plate as an intermediary optical element that separates visible light and near-infrared light into different optical paths. This mediator enables wavelength-specific processing while managing the aberrations it introduces through careful optical design
Solution Approach 2:
The patent adjusts optical parameters of existing components (such as lens curvature, focal length, or element positions) to compensate for the chromatic and off-axis aberrations introduced by the beam splitter structure, thereby optimizing overall image quality
2Object-affected harmful factors
If parameters of other optical structures are changed to balance aberrations, then overall chromatic and off-axis aberration are reduced, but device complexity increases
Solution Approach 1:
The patent applies different optical characteristics to different regions or components of the optical system. By optimizing specific lens elements or structural parameters locally rather than uniformly across the entire system, the design achieves aberration correction with minimal increase in overall complexity
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
Reduces chromatic and off-axis aberrations, simplifying the correction process and improving image quality in low-illumination conditions.
Implementation Method 1
the beam splitter film is configured to reflect visible light and transmit near-infrared light
Implementation Method 2
the beam splitter film is configured to reflect visible light and transmit near-infrared light
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Embodiments of this application relate to the field of electronic device technologies, and provide a beam splitter plate, a beam splitter apparatus, a beam splitter lens module, a camera, and an electronic device, to reduce a chromatic aberration and an off-axis aberration introduced by a beam splitter structure, and reduce difficulty in correcting a chromatic aberration and an off-axis aberration of a camera. The beam splitter plate includes a transmissive plate and a beam splitter film. The transmissive plate is a light-transmitting plate-like structure. The beam splitter film is supported on the transmissive plate and is parallel to the transmissive plate. The beam splitter film is configured to reflect visible light and transmit near-infrared light, or the beam splitter film is configured to reflect near-infrared light and transmit visible light. A thickness of the transmissive plate satisfies that when the beam splitter plate is disposed obliquely in a transmission path of an imaging beam of a camera, transmission path lengths of visible light and near-infrared light in the imaging beam in the transmissive plate are both less than a projection length of the beam splitter film on an optical axis of the imaging beam. The beam splitter plate provided in the embodiments of this application is configured to separate the visible light from the near-infrared light in the imaging beam.