Variable-Power Monocular Optics for High-Resolution Zoom Imaging
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Solution Overview
Problem
Existing variable-magnification monoculars suffer from low resolution and poor user experience.
Innovation Solution
A variable power monocular design comprising specific lens arrangements and a prism group, allowing for continuous magnification adjustment through movable lens groups and internal focusing, with cemented lenses and low-dispersion glass to reduce chromatic aberration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If variable magnification is increased, then field of view is reduced and objects appear larger, but resolution deteriorates and image quality decreases
Solution Approach 1:
The optical system is divided into multiple lens groups (object lens group with 4 lenses, eyepiece group with 8 lenses) that can move independently along the optical axis. This segmentation allows different groups to perform specific functions: some groups adjust magnification while others maintain focus and image quality, resolving the contradiction between variable magnification and resolution.
Solution Approach 2:
The patent implements dynamic adjustment mechanisms where lens groups move along the optical axis to change magnification from 60x to 20x continuously. The object lens group and eyepiece group have movable components that dynamically reconfigure the optical path, enabling the system to adapt magnification while maintaining optimal image quality through coordinated movement of multiple lens groups.
2Adaptability or versatility
If multiple lens groups are added for continuous magnification adjustment, then device complexity increases, but manufacturing precision requirements increase and chromatic aberration worsens
Solution Approach 1:
Multiple lens groups are nested within a compact optical housing, with the object lens group containing 4 lenses and the eyepiece group containing 8 lenses arranged in sequence. The nested arrangement allows complex optical functionality to be integrated into a manageable structure, reducing the impact of device complexity while maintaining continuous magnification adjustment capability.
Solution Approach 2:
The patent employs composite lens designs combining different glass types with varying dispersion properties. By using composite material compositions in the lens groups, chromatic aberration is corrected despite the complexity of multiple moving lens groups, as each lens group is optimized with specific material properties to counteract color separation effects.
3Measurement precision
If cemented lenses and low-dispersion glass are used to reduce chromatic aberration, then manufacturing precision increases, but resolution and image quality improve
Solution Approach 1:
Adjacent lenses are cemented together to form compound lens elements, merging multiple optical surfaces into integrated units. This combining approach reduces the number of air-glass interfaces that cause chromatic aberration and simplifies the manufacturing process by reducing alignment requirements between separate lens elements, thereby improving chromatic correction without proportionally increasing manufacturing precision demands.
Solution Approach 2:
Low-dispersion glass materials with specific refractive indices are selected and combined in the lens groups to inherently reduce chromatic aberration. By using composite material properties at the material level rather than relying solely on precise mechanical assembly, the patent achieves better chromatic correction while moderating the manufacturing precision requirements.
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
Achieves high resolution and large field of view with stable imaging across different magnifications, while maintaining a compact size and low weight, enhancing user experience.
Implementation Method 1
A variable power monocular, comprising an object lens group, a prism group and an eyepiece group arranged in sequence along the optical axis direction
Implementation Method 2
the half-pentaprism may be used to change the direction of the optical axis
Implementation Method 3
cemented lenses and low-dispersion glass to reduce chromatic aberration
Data Source
AI summary
Aspects of the invention disclose a variable-magnification monocular, comprising an objective lens group, a prism group and an eyepiece group arranged in sequence along an optical axis direction, wherein the eyepiece group comprises an eyepiece compensation group, an eyepiece variable-magnification group and an eyepiece fixing group arranged in sequence; the focal lengths of all lens groups satisfy the following conditional formula: −1.4<F31/F32<−0.9 and 2<F33/F32<1.7. The eyepiece magnification group and the eyepiece compensation group may move closer to or farther from each other along the optical axis to achieve continuous change of magnification between 60-20. The monocular may achieve continuous adjustment of the magnification of the monocular by moving the eyepiece zoom group and the eyepiece compensation group closer to or farther from each other along the optical axis, which can meet the needs of different observation objects.