Optical Apparatus Variable Transmittance Element Aperture Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical apparatuses fail to adequately adjust the clarity of the blur's outline when the aperture diameter of the stop is significantly changed, limiting their ability to produce both smooth and clear blur effects simultaneously.
Innovation Solution
The optical apparatus includes a mechanical stop and a distribution variable element capable of changing the aperture radius and transmittance distribution, respectively, with a control unit to manage these changes, allowing for a wide range of aperture adjustments and transmittance variations to achieve desired blur effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a stop aperture diameter is largely changed, then the light transmission and depth of field are adjusted, but the sharpness of the blur outline cannot be sufficiently adjusted
Solution Approach 1:
The patent applies local quality by introducing an optical element with a specific transmittance distribution that selectively modifies light transmission in different regions of the optical path. This element creates a localized effect on the blur outline sharpness while maintaining the overall aperture control, allowing independent adjustment of outline sharpness from the aperture size itself
Solution Approach 2:
The patent utilizes parameter changes by varying the transmittance distribution parameter (characterized by radius rv0.25) of the optical element. By changing this parameter, the system can adjust the sharpness of the blur outline independently from the aperture diameter, enabling sufficient adjustment even when aperture diameter is largely changed
2Manufacturing precision
If an optical element with fixed transmittance distribution is used, then the blur outline sharpness is adjusted near maximum aperture, but the adjustment becomes insufficient when aperture diameter is reduced
Solution Approach 1:
The patent applies dynamics by making the transmittance distribution of the optical element variable rather than fixed. The element can dynamically change its transmittance distribution parameter in response to different aperture settings, ensuring that blur outline sharpness adjustment remains effective across the entire aperture range from maximum to reduced apertures
Data Source
AI summary
An apparatus includes a system having an element capable of changing a radius at which a normalized transmittance becomes 0.25 by 20% or more of a maximum effective radius and a stop capable of changing an aperture radius, and a control unit for controlling a transmittance distribution of the element and the aperture radius.