Interchangeable Lens System for High Magnification Microscopy
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Solution Overview
Problem
Existing lens systems for interchangeable-lens digital cameras have limitations in magnification and focusing capabilities, particularly for microscope photography, with low magnification and complex focusing mechanisms that are not suitable for capturing high-quality images of minute objects.
Innovation Solution
A lens system comprising a first lens group with positive optical power moved along the optical axis for focusing, accompanied by a second lens group with optical power, satisfying specific focal length and distance conditions to achieve a magnification of approximately 10 to 20 times, enabling simple and high-definition focusing without the need to move the photographic object or camera system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a lens system with low magnification (approximately 1-times) is used, then the optical system is simple and compact, but it is insufficient to take still pictures and videos for minute photographic objects such as microorganisms and textiles
Solution Approach 1:
The lens system is divided into multiple lens groups (first lens group with positive optical power, second lens group with optical power) that can be independently positioned and focused. This segmentation allows the system to achieve high magnification (10-20 times) while maintaining a compact structure by optimizing the arrangement and focal lengths of individual groups rather than requiring a single complex lens.
Solution Approach 2:
The first lens group is designed to be movable toward the image side along the optical axis during focusing from far-object to near-object in-focus state. This dynamic positioning capability enables the lens system to adapt to different focusing distances while maintaining high magnification, resolving the contradiction between simplicity and magnification power.
2Ease of operation
If a lens system requires the photographic object to be held on a stage or the camera system to be moved in an optical axis direction for focus adjustment, then the optical system can achieve focusing, but it is difficult to perform simple focusing
Solution Approach 1:
The first lens group is designed to be movable toward the image side along the optical axis during focusing from far-object to near-object in-focus state. This dynamic positioning capability enables the lens system to adapt to different focusing distances while maintaining high magnification, resolving the contradiction between simplicity and magnification power.
Solution Approach 2:
The lens system performs focusing automatically by moving the first lens group along the optical axis without requiring external intervention to hold objects on stages or move the entire camera system. The lens group self-adjusts its position to achieve focus at different distances, simplifying the focusing operation.
3Measurement precision
If the lens system has high magnification (10 to 20 times), then it can capture minute photographic objects clearly, but the focusing mechanism becomes more complex
Solution Approach 1:
The lens system is divided into multiple lens groups (first lens group with positive optical power, second lens group with optical power) that can be independently positioned and focused. This segmentation allows the system to achieve high magnification while maintaining a compact structure by optimizing the arrangement and focal lengths of individual groups rather than requiring a single complex lens.
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 solution provides a lens system with enhanced magnification and simplified focusing capabilities, suitable for microscope photography, ensuring clear and efficient imaging performance while maintaining a compact structure.
Implementation Method 1
a first lens group that is moved toward an image side along an optical axis in focusing from a far-object in-focus state to a near-object in-focus state
Implementation Method 2
a lens system... with a first lens group that has positive optical power, and a second lens group that is disposed on the image side relative to the first lens group and has optical power
Data Source
AI summary
A lens system in the present disclosure includes: a first lens group that is moved toward an image side along an optical axis in focusing from a far-object in-focus state to a near-object in-focus state, and has positive optical power; and a second lens group that is disposed on the image side relative to the first lens group and has optical power. The lens system satisfies the following conditions (1) and (2).0.5<|fg1/WD|<2.0 (1)20<|fg2/f|<700 (2)wherefg1 is a focal length of the first lens group,WD is a distance, on the optical axis, from an object surface to a lens surface located closest to an object side of the first lens group,fg2 is a focal length of the second lens group, andf is a focal length of the lens system under the far-object in-focus state.