Five-Lens Optical System for Wide-Angle Imaging
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Solution Overview
Problem
Current optical lens systems face challenges in achieving wide-angle capabilities while maintaining excellent imaging quality and reducing manufacturing costs.
Innovation Solution
The optical lens design consists of a sequence of lenses with specific refractive powers and Abbe numbers, including a first lens with negative refraction, a second lens with negative refraction and a high Abbe number, a third lens with positive refraction and a thickness greater than 3 mm, a fourth lens with positive refraction, and a fifth lens with negative refraction and high refractive index, optimized to achieve a wide angle of over 180° and improved imaging performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the optical lens uses multiple lenses with complex structure to achieve wide angle, then the field of view increases, but the manufacturing cost increases
Solution Approach 1:
The patent applies parameter changes by specifying precise refractive index ranges (nd2≥1.6, nd5≥1.9) and Abbe number ranges (vd2 between 20-30) for lens materials, along with specific thickness constraints (third lens thickness >3mm). These parameter optimizations enable the lens system to achieve wide-angle performance (FOV≥135°) while controlling manufacturing complexity through standardized material selections.
Solution Approach 2:
The patent employs composite material strategies by combining lenses with different refractive properties - specifically using a second lens with high Abbe number (low dispersion) and a fifth lens with high refractive index (nd5≥1.9). This composite approach allows the system to achieve wide-angle imaging quality by compensating for chromatic aberrations through material property differentiation rather than increasing overall system complexity.
2Manufacturing precision
If the optical lens increases the number of lenses to improve imaging quality, then the imaging performance increases, but the device complexity increases
Solution Approach 1:
The patent applies local quality by assigning specific functional characteristics to individual lenses within the five-lens system. The second lens is designated with high Abbe number properties for chromatic aberration control, the third lens has increased thickness (>3mm) for specific optical path management, and the fifth lens uses high refractive index material. This localized optimization of material properties allows each lens to address specific imaging quality issues without requiring all lenses to be complex.
Solution Approach 2:
The patent utilizes parameter changes by establishing specific numerical constraints for lens parameters: refractive indices (nd2≥1.6, nd5≥1.9), Abbe numbers (vd2 between 20-30), and thickness (third lens >3mm). These quantified parameters provide clear manufacturing guidelines that simplify the design process while achieving superior imaging quality, thereby reducing the practical complexity despite using multiple lenses.
3Area of stationary object
If the optical lens optimizes for wide angle, then the field of view increases, but the imaging quality deteriorates
Solution Approach 1:
The patent converts the typically harmful effect of chromatic aberration into a beneficial design constraint. By specifying the second lens with high Abbe number (vd2 between 20-30, indicating low dispersion) and the fifth lens with high refractive index (nd5≥1.9), the design uses material dispersion properties to correct chromatic aberrations that naturally occur in wide-angle systems. This transforms the chromatic dispersion challenge into an opportunity for optimized color correction across the wide field of view (≥135°).
Solution Approach 2:
The patent employs composite material strategies by combining lenses with different refractive properties - specifically using a second lens with high Abbe number (low dispersion) and a fifth lens with high refractive index (nd5≥1.9). This composite approach allows the system to achieve wide-angle imaging quality by compensating for chromatic aberrations through material property differentiation rather than increasing overall system 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
This design achieves a wide-angle field of view exceeding 180° with enhanced imaging quality, controlled aberrations, and reduced manufacturing costs, suitable for various applications including handheld communication systems and digital cameras.
Implementation Method 1
The optical lens, in order from an object side to an image-forming side, includes a first lens with negative refraction power, a second lens with negative refraction power, a third lens with positive refraction power, a fourth lens with positive refraction power, and a fifth lens with negative refraction power
Data Source
AI summary
An embodiment of this disclosure provides an optical lens, which includes, in order from an object side to an image-forming side, a first lens with negative refraction power; a second lens with negative refraction power; a third lens with positive refraction power; a fourth lens with positive refraction power; and a fifth lens with negative refraction power; wherein the second lens has an Abbe number vd2, the fifth lens has a refractive index nd5, and 20≤vd2≤30 and nd5≥1.9.