AFM Head Laser Spot Movement Limiting Mechanism
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Solution Overview
Problem
The existing atomic force microscopes face usability issues due to a large movement range of the laser spot, which makes it difficult for users to position the laser spot accurately on the cantilever, especially when changing cantilevers, leading to increased time and inconvenience, particularly for less familiar users.
Innovation Solution
A head for the atomic force microscope is designed with a spot moving means and a movement limiting means that restricts the laser spot's movement range to a predetermined area, using a knob and screw mechanism or a projection and hook unit to ensure the laser spot is positioned accurately and efficiently on the cantilever surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the laser spot movement range is made large to accommodate various cantilever sizes, then adaptability is improved, but positioning precision and ease of operation deteriorate
Solution Approach 1:
The adjustment mechanism is divided into two independent segments: a coarse adjustment mechanism for moving the laser spot within a first range to accommodate different cantilever sizes, and a fine adjustment mechanism for moving the laser spot within a second, smaller range for precise positioning. This segmentation allows each mechanism to be optimized for its specific function, resolving the contradiction between adaptability and positioning precision.
2Adaptability or versatility
If the laser spot movement range is made large to accommodate various cantilever sizes, then adaptability is improved, but operation time and complexity increase
Solution Approach 1:
The adjustment process is segmented into two stages: first using the coarse adjustment mechanism to quickly position the laser spot within the appropriate range for the cantilever size, then using the fine adjustment mechanism to precisely position the laser spot on the cantilever surface. This two-stage approach significantly reduces the time and complexity of operation compared to using a single large-range adjustment mechanism.
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 enhances usability by allowing easy and precise positioning of the laser spot, reducing the time and effort required to align it, thereby improving the overall convenience and efficiency of the atomic force microscope operation.
Implementation Method 1
The laser beam is directly reflected by the mirror 24 and thereafter, passes through a hole formed in the intermediate body 28 to be reflected on the top surface of the cantilever 2 again
Implementation Method 2
as the beam detecting device 26, a position sensitive photo detector (PSPD) is primary used
Data Source
AI summary
Provided are a head having improved usability by limiting a movement range of a laser spot and an atomic force microscope having the same.A head according to an exemplary embodiment of the present disclosure is a head measuring bending of a cantilever by using a laser beam reflected on the surface of the cantilever in order to acquire information on a sample surface by using a tip of the cantilever. The head includes: a spot moving means configured to move a laser spot so as to position the laser spot on the surface of the cantilever; and a movement limiting means configured to limit a movement range of the laser spot moved by the spot moving means in a predetermined range.