Compact Scheimpflug Lens Adjustment Device with Beveled Rings
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Solution Overview
Problem
Existing camera adjustment devices fail to maintain optimal image quality by losing brightness and introducing optical aberrations when adjusting the optical lens for Scheimpflug type applications, especially with large sensors.
Innovation Solution
A compact adjustment device with two beveled rings and a translation mechanism, allowing precise angular adjustments and maintaining nominal back focus, enabling the application of the Scheimpflug principle without loss of brightness or optical aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the diaphragm is closed to increase depth of field for inclined planes, then the sharpness zone is improved, but the brightness is lost
Solution Approach 1:
The patent introduces a dynamic adjustment mechanism with two beveled rings that can be rotated to change the optical axis orientation relative to the sensor plane. This dynamic adjustment allows the system to achieve Scheimpflug effect for extended depth of field while maintaining full aperture for brightness, resolving the contradiction between sharpness zone and brightness.
2Measurement precision
If the optical lens is oriented at large angles to the sensor plane to achieve Scheimpflug effect, then the depth of sharpness is improved, but optical aberrations and vignetting increase
Solution Approach 1:
The patent divides the adjustment mechanism into two independent beveled rings that can be rotated separately. The first beveled ring adjusts the tilt angle, while the second beveled ring adjusts the azimuth angle. This segmentation allows precise control over the optical axis orientation to achieve Scheimpflug effect while minimizing optical aberrations and vignetting through optimized angle selection.
3Adaptability or versatility
If an adjustment device is added to enable lens orientation adjustment, then the Scheimpflug effect is achieved, but the device complexity increases
Solution Approach 1:
The patent merges the two beveled rings into a single integrated adjustment mechanism that can be mounted on existing camera bodies. The rings are designed to work together as a cohesive unit, allowing dual-angle adjustment while maintaining compact form factor and avoiding excessive complexity.
4Illumination intensity
If the adjustment device is made compact to maintain nominal optical back focus, then the brightness is maintained, but the adjustment range may be limited
Solution Approach 1:
The patent achieves compact design by utilizing angular adjustment in multiple dimensions through the two beveled rings. Instead of increasing linear travel distance, the mechanism uses rotational movement of the rings to achieve the full range of motion, maintaining compact back focus distance while providing adequate adjustment range for Scheimpflug applications.
Data Source
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AI summary
The invention relates to an adjustment device (100) for an optical lens (2) of a camera (3), comprising an adjustment device (100) according to the invention, and a method for adjusting said camera. According to the invention, the adjustment device (100) comprises an openwork fixing base (101) and two beveled rings, a first ring (102) of which is rotatably mounted on said base (101) and a second ring (103) of which is rotatably mounted on said first ring (102), said second ring (103) being intended to receive the optical lens (2) of the camera (3).