Anamorphic Lens Cylindrical Spherical Group Design
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Solution Overview
Problem
Current professional super wide-angle large aperture anamorphic lenses are expensive and unsuitable for ordinary consumers due to their size and weight, requiring manual editing to achieve cinematic widescreen ratios which sacrifices pixel quality.
Innovation Solution
A compact, lightweight super wide-angle large aperture anamorphic lens design incorporating a cylindrical lens group and a spherical lens group, with specific power distribution relationships, allowing for a 24 mm focal length and 2.8 aperture, reducing the need for post-editing and achieving a 2.4:1 widescreen format without pixel sacrifice.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If professional anamorphic lenses are used to achieve cinematic widescreen ratio, then the shooting picture width and optical quality are improved, but the lens size and weight become excessively large
Solution Approach 1:
The lens system is divided into distinct functional groups: a cylindrical lens group (with sub-groups for anamorphic effect) and a spherical lens group (for focus and aberration correction). This segmentation allows each group to be optimized independently, achieving widescreen capability with reduced overall size and weight compared to traditional monolithic anamorphic lenses.
Solution Approach 2:
The patent introduces a cylindrical lens component that operates in a different dimensional orientation than traditional spherical lenses. By using cylindrical lenses with specific curvature radii in the horizontal dimension, the system achieves widescreen anamorphic effect without requiring the excessive size of conventional professional anamorphic lenses.
2Area of stationary object
If professional anamorphic lenses are used to achieve cinematic widescreen ratio, then the shooting picture width is improved, but the cost becomes prohibitively expensive
Solution Approach 1:
The lens is segmented into standardized groups (cylindrical group with 4 lenses, spherical group with multiple lenses) that can be manufactured and assembled separately. This modular approach reduces manufacturing complexity and cost compared to custom-made professional anamorphic lenses, making the technology accessible to ordinary consumers.
Solution Approach 2:
The patent specifies particular parameter ranges for lens curvature radii and power distributions that optimize the anamorphic effect while controlling manufacturing costs. By defining specific parameter relationships (e.g., curvature radius ratios, power distribution formulas), the design achieves professional-quality widescreen imaging with mass-producible components.
3Device complexity
If manual editing or digital cropping is used to achieve widescreen ratio, then the lens complexity is reduced, but pixel quality is sacrificed
Solution Approach 1:
The lens performs the widescreen transformation optically during image capture rather than requiring post-capture editing. The cylindrical and spherical lens groups work together to project a 2.4:1 widescreen image directly onto the sensor, preserving all pixels without cropping or digital manipulation. This preliminary optical action eliminates the need for quality-degrading post-processing.
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 design corrects overall aberrations, increases the angle of view, and provides optical characteristics like elliptical out-of-focus flare, enabling a larger shooting picture width and a 2.4:1 widescreen format without pixel loss, while being significantly lighter and more affordable.
Implementation Method 1
The cylindrical lens group may include, from the object side to the image side, a first lens, a second lens, a third lens, and a fourth lens in a sequential order. In one embodiment, the first lens and the second lens may be negative optical power cylindrical lens. The third and the fourth lenses may be positive optical power cylindrical lenses.
Implementation Method 2
The spherical lens group is provided with a fifth lens, a sixth lens . . . to Nth lens, where N is greater than or equal to a natural number of 10, in sequence along the direction of the optical path pointing to the image side.
Data Source
AI summary
An ultra-wide-angle large-aperture anamorphic lens includes a cylindrical lens group and a spherical lens group arranged in sequence from the object side to the image side. The cylindrical lens group includes a first lens, a second lens, the third lens and the fourth lens. The first lens and the second lens are negative refractive power cylindrical lenses, and the third lens and the fourth lens are positive refractive power cylindrical lenses. The spherical lens group includes a fifth lens, a sixth lens, . . . , a thirteenth lens that are sequentially arranged along the direction that the optical path points to the image side. A 2.4:1 widescreen video or photo may be obtained; at the same time, because the anamorphic lens is a front anamorphic design, in addition to the anamorphic function, it will also have optical characteristics such as elliptical out-of-focus flare and sci-fi line flare.