Camera Filter Unit Motor Integration for Miniaturization
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Solution Overview
Problem
The miniaturization of camera apparatuses with polarization filters is hindered by the need for multiple motors to manage the insertion, removal, and angle adjustment of polarization and infrared ray cut filters, due to limited space between the lens and imaging device.
Innovation Solution
A camera apparatus and filter unit design that uses a common mechanism for inserting and removing the polarization filter and infrared ray cut filter, where a first motor rotates the polarization filter through a first frame part, and a second motor reciprocates a filter frame supporting all filters, allowing stepless adjustment of the polarization angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple motors are used to manage insertion, removal, and angle adjustment of polarization and infrared ray cut filters, then filter positioning and operation are efficient, but device complexity increases and miniaturization is hindered
Solution Approach 1:
The patent combines the functions of multiple motors into a single motor unit. The first motor unit performs both the insertion/removal of the polarization filter and the angle adjustment, while the second motor unit handles both insertion/removal of the infrared ray cut filter and the polarization filter. This merging reduces the total number of motors from three to two, enabling miniaturization while maintaining efficient filter operation.
Solution Approach 2:
The motor units are designed to perform multiple functions. The first motor unit can both insert/remove the polarization filter and adjust its polarization angle. The second motor unit can insert/remove both the infrared ray cut filter and the polarization filter. This multi-functionality allows a reduced number of motors to control all filter operations, resolving the contradiction between operational efficiency and device complexity.
2Manufacturing precision
If three motors are used for polarization filter insertion, removal, and angle adjustment, then filter control is precise, but the apparatus cannot be miniaturized due to limited space
Solution Approach 1:
The patent merges the functions of three separate motors into two motor units. The first motor unit combines insertion/removal and angle adjustment functions, while the second motor unit combines insertion/removal functions for both filters. This reduction in motor count directly reduces the volume required in the limited space between the lens and imaging device, enabling miniaturization while maintaining precise filter control through the integrated mechanisms.
3Ease of operation
If separate mechanisms are used for insertion/removal and angle adjustment of polarization filter, then each function is optimized, but device complexity increases
Solution Approach 1:
The patent integrates the insertion/removal mechanism and angle adjustment mechanism into a single first motor unit for the polarization filter. The insertion/removal is achieved through linear movement of the motor unit along the optical axis, while angle adjustment is achieved through rotational movement. This merging maintains optimized individual functions while reducing overall device complexity by eliminating the need for separate mechanisms.
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 selective use of filters and stepless adjustment of the polarization angle, facilitating the miniaturization of the camera apparatus by integrating the insertion, removal, and angle adjustment mechanisms, while maintaining efficient filter positioning and operation.
Implementation Method 1
a polarization filter that transmits only light beams having a predetermined polarization component and removes unnecessary light beams
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A camera device comprising an imaging device (21) accommodated inside a camera body (20), a polarization filter (33) that transmits light beams having a predetermined polarization component among light beams incident on the imaging device (21) and an infrared cut filter. The polarization filter (33) is supported by a first frame part (36) and is rotated by a first motor (43). A second motor (37) is capable of inserting and removing any one of the polarization filter (33) and the infrared cut filter (34) with respect to an imaging region of the imaging device (21). Wherein, when the second motor (37) inserts the polarization filter (33) in the imaging region of the imaging device (212), the first motor (43) interlocks the first frame part (36) and the polarization filter (33) is rotated by the first motor (43). Therefore, it is possible to selectively use the filters and to steplessly adjust a polarization angle of the polarization filter (33).