Two-Piece Optical Prism for Surface Plasmon Resonance
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Solution Overview
Problem
Conventional surface plasmon resonance systems face limitations in test sensitivity and dynamic range due to fixed incident angles, which restrict the versatility and efficiency of biochemistry tests, particularly in the combination with detection chips and the design constraints imposed by existing optical prism designs.
Innovation Solution
A two-piece optical prism with a groove and arc faces is designed to allow for adjustable and controlled incident light angles, utilizing total internal reflection through triangular prisms to enhance multi-angle scanning capabilities, thereby increasing sensitivity and dynamic detection range without additional coating processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed incident angle is used in surface plasmon resonance system, then the system structure is simple, but the test sensitivity and dynamic detection range are limited
Solution Approach 1:
The optical prism is divided into two separate pieces: a first optical prism and a second optical prism. This segmentation allows each prism to be independently designed with specific arc faces that can be precisely controlled, thereby improving measurement precision while keeping each individual prism component relatively simple in structure
Solution Approach 2:
The invention introduces angular dimensionality by designing arc faces on both prisms that enable multi-angle incident light paths. Instead of a single fixed angle, the system can now operate at multiple angles determined by the arc face geometries, expanding the dynamic detection range without requiring complex mechanical adjustment mechanisms
2Adaptability or versatility
If a single-piece optical prism is used, then the manufacturing process is simple, but the combination with detection chip is complex and the detection point size and shape are limited
Solution Approach 1:
By dividing the optical prism into two separate pieces, each prism can be manufactured independently using standard fabrication processes. The first optical prism and second optical prism can be produced separately and then assembled, which simplifies the manufacturing of each individual component while providing greater flexibility in designing the detection point geometry on the detection chip
Solution Approach 2:
The second optical prism is positioned within or adjacent to the first optical prism, with the groove of the first prism accommodating the second prism. This nested arrangement allows the two-prism system to be compact while maintaining manufacturing simplicity, as each prism can be fabricated separately and then integrated into the final assembly
3Manufacturing precision
If additional coating processes are used to adjust incident angles, then the incident angle control is precise, but the production cost increases
Solution Approach 1:
Instead of using additional coating processes to adjust incident angles, the invention changes the fundamental geometric parameters of the prisms themselves. By designing specific arc faces with predetermined curvatures and angles on both the first and second optical prisms, the incident angle control is achieved through the intrinsic geometry of the components rather than through complex coating processes, thereby reducing production costs while maintaining manufacturing precision
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 two-piece optical prism system enhances the sensitivity and dynamic detection range of surface plasmon resonance systems, simplifies manufacturing, reduces production costs, and improves detection efficiency by enabling wide-angle, multi-angle scanning and reducing the size and complexity of detection chips.
Implementation Method 1
utilizing total internal reflection through triangular prisms to enhance multi-angle scanning capabilities
Implementation Method 2
Surface plasmon resonance test is a highly sensitive test currently broadly used in a variety of fields... The testing principle is to obtain a surface refractive index change by changing an angle that light is incident in the surface of surface metal
Data Source
AI summary
A two-piece optical prism includes a prism having a groove and prism having arc faces, where the prism having a groove has at least one first arc face and groove having at least one second arc face, and the prism having arc faces is placed in the groove of the prism having a groove and has at least one third arc face. The present invention can be used in the surface plasmon resonance optical system for the angle, range adjustment and control of incident light (e.g. laser light), capable of constituting an optical wide-angle, multi-angle incident system to carry out the wide-angle, multi-angle scanning detection of surface plasmon resonance, increasing the system dynamic detection range and sensitivity; and further reducing a detection chip.