Multi-Beam Optical Scanner Pre-Deflection System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light beam scanning devices face difficulties in adjusting the pitch, focal positions, and beam diameters of divergent light beams from multiple sources, making it challenging to achieve desired optical characteristics in multi-beam optical systems.
Innovation Solution
A pre-deflection optical system comprising a first optical system to weaken or convert divergent light beams into parallel or converging beams, a second optical system with a negative power lens, and a third optical system with a positive power lens, in conjunction with a rotary deflector, shapes and scans the light flux into a specified direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional light beam scanning device structure is used with multiple light sources, then the device can process multiple light beams, but it becomes difficult to adjust the pitch, focal positions, and beam diameters of all light fluxes to appropriate values
Solution Approach 1:
The pre-deflection optical system is divided into three distinct optical systems (first, second, and third) that can be independently adjusted. Each optical system handles specific aspects of beam shaping, allowing separate optimization of pitch, focal positions, and beam diameters for multiple light sources without mutual interference
Solution Approach 2:
The optical systems are designed with adjustable parameters that can be dynamically modified to optimize beam characteristics. The system allows for flexible adjustment of optical elements to accommodate different light sources and achieve desired beam properties for each light flux
2Device complexity
If only conventional optical systems are used to shape divergent light beams, then the structure remains simple, but the beam characteristics cannot be precisely controlled for multiple light sources
Solution Approach 1:
Each optical system within the pre-deflection assembly is designed to provide specific local optical functions: the first optical system for basic beam shaping, the second for pitch adjustment, and the third for focal position control. This localized functional differentiation enables precise control of beam characteristics while maintaining a modular structure
Solution Approach 2:
The pre-deflection optical system as a whole serves multiple functions simultaneously: it shapes divergent beams from multiple light sources, controls pitch between beams, adjusts focal positions, and optimizes beam diameters. The integrated multi-functional design achieves precise beam control without requiring entirely separate systems for each function
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 configuration allows for precise adjustment of beam characteristics, enabling scanning with desired optical properties and improving the overall performance of the light beam scanning device.
Implementation Method 1
a first optical system to weaken a degree of divergence of the divergent light beams from the plural light sources or to convert them into parallel light beams or converging light beams
Implementation Method 2
a second optical system including at least one lens having a negative power in a rotation axis direction of the rotary deflector
Implementation Method 3
a third optical system having a positive power in the rotation axis direction of the rotary deflector
Implementation Method 4
a rotary deflector that deflects the light flux shaped by the pre-deflection optical system and scans it in the specified direction
Data Source
AI summary
A technique is provided which can realize scanning by a light flux having a desired optical characteristic in a light beam scanning device adopting a multi-beam optical system. There are provided a pre-deflection optical system that shapes divergent light beams from plural light sources into a light flux having a cross-sectional shape long in a specified direction, and a rotary deflector that deflects the light flux shaped by the pre-deflection optical system and scans it in the specified direction, and the pre-deflection optical system includes a first optical system that weakens a degree of divergence of the divergent light beams from the plural light sources or converts them into parallel light beams or converging light beams, a second optical system including at least one lens having a negative power in a rotation axis direction of the rotary deflector, and a third optical system having a positive power in the rotation axis direction of the rotary deflector.