LC Coded Aperture Lens Assembly for Light Leakage Control
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Solution Overview
Problem
Existing imaging technologies struggle to capture clear 3D images or full-focus images due to limited depth of field and require efficient methods to measure distance information for each imaging point, especially when using liquid crystal coded apertures.
Innovation Solution
A lens assembly is designed with a liquid crystal coded aperture (LC coded aperture) integrated into a flexible circuit board system, allowing for rapid pattern switching and electrical signal supply, housed within a lens barrel configuration that prevents light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a liquid crystal coded aperture is used to increase pattern formation freedom, then the degree of freedom in pattern formation is greatly increased, but the device complexity increases due to the need for electrical signal supply and power connection
Solution Approach 1:
The flexible circuit board is integrated within the lens barrel structure, with the LC coded aperture positioned between the front lens element and the rear lens element. The flexible circuit board is routed through the lens barrel and connected to the LC coded aperture, nesting the electrical connection system within the existing optical assembly structure.
Solution Approach 2:
A flexible circuit board serves as an intermediary component that bridges the LC coded aperture and the external power/control system. The flexible circuit board transmits electrical signals and power to the LC coded aperture while being routed through the lens barrel structure, enabling electrical connection without compromising the optical path.
2Ease of operation
If the flexible circuit board is connected to the liquid crystal coded aperture, then electrical signals and power can be supplied, but light leakage may occur at the connection interface
Solution Approach 1:
A notch is formed in the side wall of the rear lens element to extract or accommodate the flexible circuit board. This allows the flexible circuit board to be pulled out through the lens barrel while maintaining a clean separation between the optical components and the electrical connection path, preventing light leakage at the connection interface.
Solution Approach 2:
The lens assembly is segmented into distinct functional zones: the optical path (front lens element, LC coded aperture, rear lens element) and the electrical connection path (flexible circuit board routed through the lens barrel). The flexible circuit board is pulled out through a dedicated opening in the rear lens element, separating the electrical function from the optical function and preventing light leakage.
3Volume of moving object
If the LC coded aperture is placed within the lens barrel, then the device becomes compact, but the flexible circuit board connection becomes complex
Solution Approach 1:
The flexible circuit board is extracted or pulled out through a dedicated opening in the rear lens element, allowing it to extend from the compact lens assembly to the external environment. This extraction approach maintains the compactness of the optical components while providing a straightforward routing path for the flexible circuit board.
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
Enables high-speed pattern switching and accurate distance measurement, facilitating the creation of clear 3D or full-focus images by effectively utilizing LC coded apertures in imaging devices.
Implementation Method 1
a liquid crystal coded aperture (LC coded aperture) integrated into a flexible circuit board system
Implementation Method 2
a front lens element having a first lens placed on a first surface of a liquid crystal coded aperture, and a rear lens element having a second lens placed on a second surface
Data Source
AI summary
The invention relates to a lens assembly using a LC coded aperture, and the configuration is as follows. A lens assembly including: a front lens element, having a first lens, placed on a first surface of a LC coded aperture; and a rear lens element having a second lens placed on a opposite surface of the LC coded aperture, the rear lens element being housed in a lens barrel, in which the rear lens element includes an upper surface and a side wall, the LC coded aperture is placed over an upper surface of the rear lens element, a flexible circuit board is connected to the LC coded aperture, a notch is formed in the wall of the rear lens element at a place corresponding to the flexible circuit board, which is pulled out to an outside through the notch from an upper part of the lens barrel.