Image Forming Optical System with Dual Adjustment Groups
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a demand for an image forming optical system that can maintain high optical performance while correcting various aberrations due to an increase in angle of view, and provide adjustment mechanisms for field curvature and image formation position adjustments.
Innovation Solution
The image forming optical system includes a first adjustment group and a second adjustment group that move along the optical axis to adjust image formation positions, with the second adjustment group consisting of at least two lenses having positive refractive power, and satisfies specific conditional expressions to ensure optimal performance and aberration correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the angle of view is increased to achieve a wider field of view, then the coverage area is improved, but various aberrations deteriorate and optical performance decreases
Solution Approach 1:
The optical system is divided into multiple lens groups with distinct functions: a first lens group with negative refractive power for wide-angle coverage, a second lens group with positive refractive power for aberration correction, and additional adjustment groups. This segmentation allows each group to optimize for its specific function while working together to achieve both wide field of view and high optical performance.
Solution Approach 2:
Different regions of the optical system are assigned different optical properties. The first lens group uses negative refractive power elements for wide-angle light gathering, while the second lens group uses positive refractive power elements for aberration correction. This local differentiation of optical qualities enables simultaneous achievement of wide coverage and high image quality.
2Adaptability or versatility
If adjustment mechanisms are added to enable field curvature and image formation position adjustments, then adaptability is improved, but device complexity increases
Solution Approach 1:
The optical system incorporates movable lens groups that can be dynamically adjusted along the optical axis. The first adjustment group moves to adjust image formation position of the magnified image, while the second adjustment group moves to adjust field curvature. This dynamic adjustability allows the system to adapt to different imaging conditions while maintaining a relatively compact structure.
Solution Approach 2:
The adjustment groups serve multiple functions: they control image formation position, correct field curvature, and maintain focus across different object distances. By designing these groups to perform multiple functions simultaneously, the patent reduces the need for separate adjustment mechanisms, thereby limiting the increase in device 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
The system effectively corrects aberrations and allows for precise adjustments, maintaining high optical performance even at wide angles, thereby enhancing the capabilities of projection type display devices and imaging apparatuses.
Implementation Method 1
the second adjustment group includes at least two lenses, has a positive refractive power as a whole
Implementation Method 2
a first adjustment group that moves along an optical axis in adjusting an image formation position
Data Source
AI summary
The image forming optical system is capable of forming an image on a conjugated plane on a reduction side as an intermediate image and re-forming the intermediate image as a magnified image on a conjugated plane on a magnification side. The image forming optical system includes: a first adjustment group that moves along an optical axis in adjusting an image formation position of a region of the magnified image including a farthest point from the optical axis; and a second adjustment group that moves along the optical axis in adjusting an image formation position of a region of the magnified image including a nearest point from the optical axis. An optical element disposed closest to the magnification side is a lens. The second adjustment group has a positive refractive power as a whole, and is disposed closest to the reduction side.