Modulating Lens Optical System for Breathing Elimination
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Solution Overview
Problem
Existing optical imaging systems suffer from 'breathing' effects, where changes in focus result in noticeable magnification changes and altered field of view, particularly problematic in video photography and focus stacking applications. Additionally, these systems often compromise on depth of field, field coverage, and image quality.
Innovation Solution
The optical imaging system employs a novel configuration of primary and secondary focusing systems, utilizing a series of optical and spatial relationships to minimize or eliminate breathing. This is achieved through a unique formula for positioning optics, allowing the system to maintain focus from near distance to infinity with minimal magnification changes and a wide field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional optical systems are used to provide focus adjustment, then focusing capability is achieved, but breathing (magnification changes and field of view alterations) occurs
Solution Approach 1:
The optical system is divided into multiple lens groups (first positive lens group, negative lens group, second positive lens group) that can move independently. The first and second positive lens groups move in opposite directions while the negative lens group remains stationary, creating a segmented focusing mechanism that eliminates breathing while maintaining focus adjustment capability.
2Reliability
If optical systems are designed to provide greater depth of field, then depth of field increases, but field coverage narrows and vignetting occurs
Solution Approach 1:
Instead of increasing depth of field by reducing aperture (which narrows field coverage), the invention uses a third dimension - the movement of multiple lens groups in opposite directions - to achieve extended depth of field while maintaining full field coverage and avoiding vignetting.
3Reliability
If aperture is decreased to increase depth of field, then depth of field increases, but light intake decreases
Solution Approach 1:
The invention uses dynamic movement of lens groups during focusing to extend depth of field, allowing the aperture to remain open wide for maximum light intake. The dynamic adjustment of lens positions compensates for focus variations without requiring aperture reduction, thus maintaining both deep depth of field and high light intake.
4Manufacturing precision
If conventional focusing systems are used, then focus adjustment is possible, but device size increases when attempting to correct breathing and field coverage issues
Solution Approach 1:
The invention combines multiple lens groups (first positive, negative, second positive) into a single integrated optical system where the groups work together in a coordinated manner. This merging of functions into one compact assembly achieves breathing correction and extended depth of field without the need for multiple separate corrective devices, maintaining a compact form factor.
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 reduces or eliminates breathing, providing a high depth of field and maintaining a wide field of view, even in compact configurations. This allows for seamless focus adjustments without noticeable magnification changes, enhancing image quality and usability in various photographic and cinematographic applications.
Implementation Method 1
a primary focusing system, the primary focusing system comprising a first positive lens system and a first negative lens system, wherein the first positive lens system comprises a modulated lens system, or a moveable lens system able to be moved toward and away from the first negative lens system so as to adjust focus
Implementation Method 2
the first positive lens system comprises a modulated lens system, or a moveable lens system able to be moved toward and away from the first negative lens system so as to adjust focus
Data Source
AI summary
The present invention relates to optical imaging systems which are able to provide increased depth of field to microscope devices, motion-picture cameras, and still photographic cameras, while also reducing or elimination breathing while the focus of the device is adjusted. Optical systems described herein are also able to be used with standard film and digital sensor formats, and are able to be attached to, or integrated with, photographic and motion-picture cameras, including currently existing cameras.