Telecentric Lens Optical Imaging System for Particle Analysis
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Solution Overview
Problem
Existing fluid image observers in various industries, such as biomedical and pharmaceutical, suffer from a shallow depth of field as magnification increases, leading to inaccurate statistical data due to blurred images of samples not on the focusing plane.
Innovation Solution
An optical imaging system comprising a collimated light source and a telecentric lens that projects a parallel beam onto a flow channel, improving the depth of field and reducing the impact of particle position on image magnification, enabling clearer and more accurate analysis of particles within the channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnification is increased to observe particle details, then image resolution is improved, but depth of field becomes shallower causing particles not on the focusing plane to appear blurred
Solution Approach 1:
The patent changes the optical parameters by using a telecentric lens system with specific focal length and aperture settings, and employs a parallel light source configuration to extend the depth of field while maintaining high magnification, allowing particles at different depths to remain in focus
2Reliability
If telecentric lens is used to extend depth of field, then image clarity is improved, but system complexity increases
Solution Approach 1:
The telecentric lens is designed to perform multiple functions simultaneously: it provides extended depth of field, maintains uniform magnification across the field of view, and ensures parallel light paths for accurate particle measurement, reducing the need for additional optical components
3Reliability
If parallel beam is used to illuminate the flow channel, then depth of field is extended, but light source requirements become more stringent
Solution Approach 1:
A collimating lens is introduced as an intermediary component between the point light source and the flow channel, transforming divergent light into a parallel beam without requiring the light source itself to emit perfectly parallel rays, thus simplifying light source selection and implementation
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 provides clearer images of particles in the flow channel, allowing for more accurate counting and analysis by maintaining consistent image magnification regardless of particle position, thereby enhancing the accuracy of statistical data.
Implementation Method 1
The collimated light source is adapted for emitting a parallel beam
Implementation Method 2
The telecentric lens is adapted for converging the parallel beam onto an imaging plane
Implementation Method 3
the telecentric lens is adapted for converging the parallel beam onto an imaging plane... reduce the impact of particle positions on image magnification
Data Source
AI summary
Provided is an optical imaging system, adapted for presenting an image of a particle. The optical imaging system includes a collimated light source, a flow channel, and a telecentric lens. The collimated light source is adapted for emitting a parallel beam. The flow channel is arranged on the transmission path of the parallel beam and is adapted for allowing the particle to pass through. The telecentric lens is arranged on the transmission path of the parallel beam. The parallel beam passes through the flow channel before transmitted to the telecentric lens, and the telecentric lens is adapted for converging the parallel beam onto an imaging plane.