Microscope Observation Optical System Eye Point Adjustment
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Solution Overview
Problem
Existing microscopes lack an efficient mechanism to adjust the eye point position without altering the optical path length, which is essential for reducing observer burden and optimizing the viewing experience.
Innovation Solution
An observation optical system comprising an infinity-corrected objective, a first lens group with positive power, a second lens group with positive power, and a tube lens, where the spaces between the objective and the first lens group, and between the second lens group and the tube lens, are configurable along the optical axis, allowing for adjustment of the eye point position without changing the image position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the optical path length is changed to adjust the eye point position, then the eye point position can be adjusted, but the image forming position is also affected
Solution Approach 1:
The optical system is divided into two independent adjustable spaces: the first space between the objective and first lens group, and the second space between the second lens group and tube lens. This segmentation allows independent adjustment of each space to achieve eye point position adjustment without affecting image forming position
Solution Approach 2:
The first and second lens groups act as intermediary elements that couple the objective and tube lens. By adjusting the spaces around these intermediaries while keeping their relative positions fixed, the system achieves eye point adjustment without disrupting the image forming relationship between objective and tube lens
2Ease of operation
If the space between objective and first lens group is extended, then the eye point position is adjusted, but the overall optical system size increases
Solution Approach 1:
The optical system incorporates dynamic adjustability by making the spaces between lens groups variable rather than fixed. This allows the system to adapt its configuration for different eye point positions while maintaining a compact base structure
Solution Approach 2:
The adjustable lens groups and their mounting structures are designed to nest within the optical tube, allowing extension and retraction of the afocal parts without significantly increasing the overall external dimensions of the microscope body
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 configuration enables the adjustment of the eye point position, reducing observer burden and allowing for a more comfortable viewing experience by maintaining the image position relative to the tube lens, while also allowing for a compact optical system design.
Implementation Method 1
an infinity-corrected objective, a first lens group having a positive power, a second lens group having a positive power, and a tube lens having a positive power
Data Source
AI summary
An observation optical system includes, in order from a sample side, an infinity-corrected objective, a first lens group having a positive power, a second lens group having a positive power, and a tube lens having a positive power. An intermediate image is formed between the first lens group and the second lens group, and at a front side focal position of the second lens group. A space along an optical axis between the objective and the first lens group is configured to be changeable, and a space along an optical axis between the second lens group and the tube lens is configured to be changeable.