Light Beam Scanning Device Mirror Curve Tilt Correction
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Solution Overview
Problem
Existing light beam scanning devices face challenges in accurately correcting both the curve and tilt of scanning lines, which affects the precision and quality of images formed in image forming apparatuses like printers.
Innovation Solution
A light beam scanning device equipped with a set of mirrors, including a scanning line curve adjusting device to bend a first mirror and a scanning line tilt adjusting device to change the orientation of a second mirror, allowing for precise correction of the curve and tilt of scanning lines on the scanned surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If both curve and tilt correction are performed through a single optical element, then the scanning line accuracy is improved, but the adjustment precision deteriorates due to difficulty in finding the best configuration
Solution Approach 1:
The patent divides the correction function into two separate devices: a scanning line curve adjusting device that bends a first mirror to correct curve deviations, and a scanning line tilt adjusting device that changes the orientation of a second mirror to correct tilt deviations. This segmentation allows each device to specialize in one type of correction, thereby improving adjustment precision while maintaining scanning line accuracy.
2Device complexity
If a single optical element is used for both curve and tilt correction, then the device complexity is reduced, but the ease of operation deteriorates due to difficulty in independent adjustment
Solution Approach 1:
By separating curve correction and tilt correction into independent devices operating on different mirrors, the system allows operators to adjust each parameter independently without affecting the other. This significantly improves ease of operation despite increasing the number of components.
Solution Approach 2:
The patent employs adjustable mirrors that can be dynamically repositioned: the first mirror is bendable to adjust curve, and the second mirror is rotatable to adjust tilt. This dynamic capability enables flexible and independent adjustment of scanning line parameters.
3Manufacturing precision
If curve correction is performed by bending a mirror, then the curve accuracy is improved, but the device complexity increases due to additional adjusting mechanisms
Solution Approach 1:
The patent uses a bendable first mirror with an integrated curve adjusting device that can dynamically change the mirror's curvature to correct scanning line curve deviations. This dynamic adjustment mechanism provides precise curve correction while keeping the structure relatively compact.
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
This solution enables accurate adjustment of scanning lines, improving image quality by reducing banding, color unevenness, and density unevenness in the final image, enhancing the optical performance of the scanning optical system.
Implementation Method 1
an optical system to guide the deflected luminous flux to the scanned surface, the optical system having a set of mirrors
Implementation Method 2
an optical system to guide the deflected luminous flux to the scanned surface, the optical system having a set of mirrors
Data Source
AI summary
A light beam scanning device scans a luminous flux irradiated from a light source and deflected by a deflector to a scanned surface through an optical system having a set of mirrors. A apparatus, such as the light beam scanning device, further includes a scanning line curve adjusting device to bend a first mirror of the set of mirrors so as to correct a curve in a scanning line on the scanned surface, and a scanning line tilt adjusting device to change orientation of a second mirror of the set of mirrors so as to correct a tilt in the scanning line on the scanned surface. The light beam scanning device may be provided in an image forming apparatus.