Optical Device Light Shielding Body Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical devices face challenges in reducing the distance between lenses while minimizing shaping failures in light shielding bodies, which occur when through-holes are made closer together to reduce lens spacing.
Innovation Solution
An optical device with a light shielding body that has a base positioned offset from the lens optical axes and projecting portions between the lenses, which helps in reducing stray light and improving optical performance by narrowing the field angles and increasing focal depth without causing shaping failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the distance between through-holes in the light shielding body is reduced to decrease lens spacing, then the lens density increases, but shaping failure in the light shielding body occurs
Solution Approach 1:
The light shielding body is segmented into a base portion and multiple projecting portions that extend between adjacent lenses. This segmentation allows the light shielding function to be distributed across multiple structural elements rather than relying solely on through-holes, enabling reduced lens spacing without compromising manufacturing integrity.
Solution Approach 2:
The light shielding structure transitions from a two-dimensional array of through-holes to a three-dimensional configuration with projecting portions extending between lenses. This dimensional change provides additional space for light shielding while maintaining adequate wall thickness between features, eliminating shaping failures associated with closely spaced through-holes.
2Volume of moving object
If the distance between lenses is reduced, then the device size decreases, but stray light increases
Solution Approach 1:
The light shielding body is divided into a base portion and multiple projecting portions positioned between adjacent lenses. This segmentation creates multiple light blocking barriers that effectively suppress stray light even when lenses are closely spaced, allowing compact device design without compromising optical performance.
Solution Approach 2:
The projecting portions act as intermediary structures between adjacent lenses, providing light shielding in the spaces between lenses. These intermediary elements block stray light paths while maintaining the compact lens arrangement, solving the contradiction between device size and stray light suppression.
3Productivity
If through-holes are made closer together to reduce lens spacing, then the optical device becomes more compact, but the light shielding effectiveness decreases
Solution Approach 1:
The light shielding approach moves from relying on through-hole spacing in two dimensions to utilizing projecting portions extending in the third dimension between lenses. This dimensional transition provides effective light shielding even when lenses are closely spaced, as the projecting portions create physical barriers in the inter-lens spaces.
Solution Approach 2:
The light shielding function is segmented into multiple projecting portions distributed between adjacent lenses, rather than relying on a single through-hole pattern. This segmentation provides continuous light blocking coverage in the inter-lens regions, maintaining effectiveness regardless of lens spacing.
Data Source
AI summary
An optical device includes a lens body including plural lenses of which optical axes are arranged alongside each other, and a light shielding body that is disposed with respect to the lens body and shields a part of light passing through the plural lenses, in which the light shielding body has a base that is provided, at a position shifted from the optical axes of the plural lenses, along an arrangement direction in which the plural lenses are arranged, and plural projecting portions that are positioned between the plural lenses and project from the base in an intersection direction intersecting the arrangement direction.